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FURNACES • OVENS • KILNS • QUENCH TANKS

A SPECIAL COMPANYL&L Special Furnace Company is the Leader in High Uniformity Batch FurnacesL&L SPECIALIZES IN● PRECISION FURNACES & OVENS● HIGH UNIFORMITY● BATCH SYSTEMS● ATMOSPHERE CONTROL● HEAT TREATING FURNACES● GAS & ELECTRIC FURNACES● CUSTOM DESIGNSSince 1946 L&L Special Furnace Co., Inc. hasdesigned special furnaces, ovens, kilns, quenchtanks, and heat treating systems. All manufacturingand engineering is done in-house fromone location just south of Philadelphia, PA.L&L sells and services its equipment all overthe world, offering start up service as well asrepair service. An extensive parts departmentoffers quick response. Great care andattention is given to instructions, wiringdiagrams, assembly drawings and supportinformation. L&L is continually updating itsproduct offerings and improving quality. Areputation for sophisticated engineering,quality workmanship and professional servicehas resulted in a large and growing base ofsatisfied customers, many of them larger andvery particular customers. Below is our18,000 square foot factory ten miles south ofPhiladelphia, PA.This 30 zone furnaceunder constructioncan achieve +/- 2°C,heat up a 5000pound load to 800°Cat 10°C per minute,cool down to 200°Cin 90 minutes andhold a positivepressure of nitrogen.The door closesautomatically andtightens with 14pneumatic clamps.VISIT OUR WEB SITEVisit www.hotfurnace.com and download PDFfiles of all our Product Bulletins for the modelslisted in this condensed line sheet plus on-lineRFQs and more technical information.SERVICE & INSTRUCTIONSWORLDWIDE SERVICEAlthough L&L designs for easy in-house startup and maintenance, worldwide factoryservice and start up assistance is alwaysavailable and sometimes recommended.INSTRUCTIONS AND MANUALSComplete manual includes start up andmaintenance instructions, theory of operation,parts list, trouble shooting guide, ladder logicdiagram, panel layout, interconnection diagram,atmosphere and pneumatic schematics, generaldimension, assembly and subassembly drawings.WARRANTYFurnaces are typically warranted for one year.Specific warranty period and terms are quoted.TESTINGControls are burnt in and calibrated atoperating temperatures in a test furnace. Allequipment is tested for proper operation.Complete in-house testing can include fullload test, uniformity test and certification toNIST standards such as in the furnace below.CUSTOM ENGINEERINGL&L has Engineered Special Furnaces and Ovens for Over 55 YearsPage 2www.hotfurnace.com

OPTIONSA Wide Range of Options Customize the Furnace or Oven for your Specific ApplicationHIGH UNIFORMITY OPTIONSHIGH TEMPERATURE FANSFans are one good way to increase thegradient uniformity in the furnace. Fans willnormally provide a gradient uniformity withinthe furnace chamber of +/-15°F (+/-8.3°C) orbetter with appropriate loading of the furnace.Recirculation muffles are used to direct airflow at lower temperatures. The maximumcontinuous temperature of the standard aircooled fan system is 1875°F (1025°C). Watercooled fans can be used to 2200°F (1200°C).MULTI-ZONINGMulti-zone control,either with manual biasing ofSCRs or with multiple PID loops, is anotherimportant tool that L&L has perfected over theyears. We were a beta test sight for Honeywell’sUMC800 multi-loop control and continue totake advantage of its capability. We have put upto 30 zones in a box furnace.ATMOSPHERE OPTIONSATMOSPHERE SEALED CASE WITHFLOWMETER/REGULATORThe furnace case is tightly sealed for use witha protective inert atmosphere. Argon, nitrogenand gases enriched with up to 4% combustiblegas can be used. No safety systems arerequired for inert gas.COMBUSTIBLE ATMOSPHERE OPTIONSSome furnaces are available with hydrogen orcarbon enriched neutral atmospheres. Automaticburn offs, gas mixing systems, automaticpurging and safety systems are available. NFPA-86C (National Fire Protection Agency) standardsfor special atmosphere furnaces are metor exceeded. See pages 16 & 30.ALLOY MUFFLES AND RETORTSAlloy muffles and retorts are designed forspecific temperature and atmosphere conditions.Alloy retorts have a much better dewpoint than the more commonly used atmospheresealed case. See pages 14-17 & 31.DOOR OPTIONSCOUNTERBALANCED VERTICAL DOORSThe furnace door rides in a guillotine typevertical track which pulls the door away fromthe furnace seal as soon as it begins to openvertically. The door is attached to thecounterbalance by heavy roller chain. Themost common lifting device is a pneumaticcylinder with hand or foot valve but handcranks and electric operators are also used.800.459.0750VENTURI SYSTEMSMOTOR DRIVEN VENTURI SYSTEMA motor driven venturi vent system isavailable. This system sucks air out of thefurnace and pulls in fresh air. Air inlets arelocated per customer requirements, typicallyon the bottom. This creates a draft whilecontrolling the cold air going into the furnaceto minimize heat shock. Capacity is 300, 600,1250 CFM or greater, depending on need.Programmable systems with pneumaticdampers as shown below are typical.HEARTHS & LOAD SYSTEMSSILICON CARBIDE HEARTHSThese are standard on higher temperaturefurnaces like the GLF and GF. They areavailable as an option on XLE furnaces. Theoptional hearths often feature molded sides.The silicon carbide hearths are normally1-1/2” thick and are typically fixed in placewith cemented firebrick. Silicon carbidefeatures high strength at high temperatures, anon-warping flat surface, and excellent heattransfer (which is especially important if thereare elements under the hearth).ALLOY HEARTHSFurnaces that operate below 2200°F (1200°C)are available with fabricated alloy hearths.These have welded sides (normally 1” high)and reinforced bottoms.The alloy is dependenton temperature and weight.ROLLER HEARTHS AND TRAYSCast alloy hearths with matching roller railsare often used for loading of heavy loads.External roller assemblies, either fixed ormovable on casters, are also available.SERPENTINE HEARTHSFabricated “serpentine” hearth trays can bedesigned for almost any size and loading. Theyare made from a series of corrugated strips ofalloy and heavy flatbars tied together withalloy rods. Serpentine hearths have goodresistance to warpage because they canexpand and contract with heating and cooling.CASTABLE PIERSCastable piers for forklift loading are available.They are cast in sections that are easy tohandle. They are fully cured for strength.Holes for lifting during maintenance are castinto the piers. See photos on page 8 & 18.LOADING RACKS & BASKETSAlloy loading racks can be quoted. These canhave several shelves which are removable orcan be positioned at different heights. Rackscan be made to roll into furnace on roller railsfor quick loading and unloading. Alloy loadingbaskets with mesh liners are also supplied.FORKLIFT LOADER SYSTEMSForklift type loaders are designed to lift a largetray or loading basket into the furnace and setit down on piers. A self contained hydrauliccylinder and hand pump do the lifting. Theloaders can work with swivel casters or ontracks with fixed wheels. These are available ina variety of capacities. Larger loaders can bemotorized and include deadman controls (seepage 9). Our smallest 500 pound loader isshown below with its included tracks.MISCELLANEOUS OPTIONSOUTER CASE HEAT SHIELDThe furnace is provided with a series of sheetmetal shields attached to the outside of theprimary furnace case. These shields keep thecase temperature below 120°F (50°C). Ventilatedshields with eductor fans are availablefor air conditioned rooms.PEEPHOLES, VENTS & SURVEY PORTSA variety of survey ports, vents, probe ports,peepholes and viewing windows are available.Page 3

XLB SERIES2350°F Premium Bench Mounted Box FurnacesAPPLICATIONSThe XLB Series Bench Mounted Furnacesachieve high precision by featuring highlyaccurate Honeywell digital PID controls,mercury contactors for fast cycle times, twozone control (top and bottom), and very evenspacing of elements. They reach 2350°F(1285°C) with the standard iron-aluminumchromeelements. The XLB Series is ourpremium bench furnace combining highuniformity, generous interior space, a springloaded vertical lift plug door, and industrialgraderuggedness. Many options are available tocustomize these for your specific application.FEATURESTWO ZONE CONTROL AND EVENELEMENT PLACEMENT FOR HIGHTEMPERATURE UNIFORMITYThe furnace is uniform to within +/-20°F(+/-11°C) at 1300°F (705°C) within 2/3 ofinside dimensions. Optional recirculatingsystems are available for tighter uniformity ofup to +/-10°F (+/-5.5°C). Elements are evenlyspaced around the top, bottom and sides. Onthe 13” wide models there are 12 elementsevenly divided on each of these surfaces.TheXL 894 has 5 elements on the top andbottom and 3 on each side. Elements are splitinto top and bottom zones.CERAMIC ELEMENT HOLDERSThe elements are supported in proprietaryceramic element holders. These provideperfect support for the coiled elements aswell as excellent radiating characteristics.Thesmooth surface prevents premature failure ofthe element as it expands and contracts. Theholders also protect the firebrick.FAST HEAT UP AND COOL DOWN TIMESAn empty XLB furnace will heat up to 2000°F(1095°C) in approximately one hour. Thehigh KW option will trim this. Cool down to500°F (260°C) is approximately10 hours.MULTILAYEREDINSULATIONThe furnace is insulatedwith 2-1/2” of low Kfactor refractory firebrickas the primary insulationbacked up by 2” of highlyinsulating mineral wool.HEAVY DUTY BENCHMOUNTED CASEThe case is constructed ofheavy gauge steel withstiffeners and lifting ringsand is painted with siliconeprimer and enamel.SPRING LOADEDVERTICAL PLUG DOORThe furnace door is aspring loaded swing upvertical door. The springholds the door tightlyclosed, counterbalances itwhile opening, and holdsit up while open. The hotface of the door is keptfrom the operator.DIGITAL PID CONTROLThe standard control is a Honeywell UDC2300 digital PID control. All fuses, transformers,contactors, and controls are located in aNEMA 1 panel. Mercury power contactorsare standard. The thermocouple is type K.Limit switches shut off furnace power if thedoor is opened or the power panel back isremoved. Control voltage is 120 volts. ANEMA 13 lighted on/off switch is included.The control circuit and each power branchcircuit is fully fused.CERAMIC HEARTH INCLUDEDCeramic standoffs maintain an air spacebetween the hearth and the bottom elements.OPTIONS● OVERTEMPERATURE SYSTEM● NEMA 12 PANEL OPTION: Includes a fuseddisconnect switch.● HIGH KW: See Specifications for amount.● INERT ATMOSPHERE CONTROL● RAMP/SOAK PROGRAM CONTROLS● TEMPERATURE RECORDERS● SCR POWER CONTROL● HIGH TEMPERATURE FANAn XL 124 withoptional high limitcontrol, siliconcarbide hearth,atmosphere controlpanel, strip chartrecorder and stand.● SPECIAL HEARTHS: Silicon Carbide or alloyhearth increases maximum load capacity.● ANGLE IRON FLOOR STANDXLB & HB SPECIFICATIONSMODEL INSIDE DIMENSIONS HEARTH OUTSIDE DIMENSIONS STANDARD HIGH AMPS MAX SHIPNUMBER IW IH ID DIMENSIONS OW OH OD KW KW AT 240/1ph LOAD LBS WEIGHTXL 112 13 12 12 11 x 11 50 38 28 6.1 8.0 22.1 75 290XL 124 13 12 24 11 x 22 50 38 40 9.8 13.0 35.3 150 350XL 126 13 12 36 11 x 33 50 38 52 13.0 17.0 31.2 225 450XL 894 18 9 24 16 x 22 55 35 40 12.0 16.0 32.5 250 600HB 9 12 8 12 11 x 11 45 38 28 4.0 6.0 16.7 75 270HB 29 12 8 24 11 x 22 45 38 40 8.0 12.0 33.4 150 400HB 39 12 8 36 11 x 33 45 38 52 12.0 18.0 50.1 225 550Dimensions are in inches. Weight is in pounds. Working dimensions should be approximately 2” less in each direction than inside dimensions. 240 or 480 volts arenormal. 208, 380 and 575 volts are optional. Both series available in single or three phase although HB series may have an unbalanced circuit.Page 4www.hotfurnace.com

GS 17142350°F Laboratory, Glass & Heat Treating Bench FurnaceAPPLICATIONSThe GS1714 Bench Furnace is an excellentgeneral purpose inexpensive laboratory gradebox furnace. The spring-loaded vertical doormakes loading and unloading effortless.Elements are located uniformly around thesides, top and bottom. A sophisticated programcontrol allows up to 6 programs to bestored. Standardized production makes theprice and value of this furnace remarkable.Use for heat treating, tempering, annealing,solution heat treating, glass fusing, glass andquartz annealing, ceramics, enameling andmany other applications.FEATURESELEMENT HOLDERSCeramic element holders provide easymaintenance and help prevent dusting.Elements won't fall out of roof.2350°F - 1285°C WITH FAST HEAT-UPHeats up to 2100°F (1150°C) in less than onehour at 240 volts, less than 2-1/2 hours at 208volts. Heats to Cone 10 for ceramics.MULTI-PROGRAM CONTROLThere are 6 programs with 8 segments each(2 programs can be linked for a total of 16segments). In addition there are four specialceramic firing programs that adjust final setpoint temperature to simulate heat-workmeasurement of ceramic cones.GS 1714 SPECIFICATIONSELEMENTS ON TOP, BOTTOM AND SIDESRESULTS IN TIGHT UNIFORMITYA nine point temperature uniformity surveydemonstrates better than +/- 7.5°F (a totalvariation of 15°F/8.3°C) from corner tocorner in the chamber from 500°F to 2000°F.COUNTERBALANCED VERTICAL DOORThe door is counterbalanced with a springand lifts easily with an air-cooled handle.SLOT IN DOORThere is a 1-1/2" wide by 2-1/2" high slot inthe bottom of the door. You can workthrough the slot while opening and closingthe door. Includes removable insulated plug.The slot is 3/4" above the hearth plate.BENCH MOUNTEDThe case is constructed of CNC precisionpunched and welded heavy gauge steel. Thecase is powder coated beige textured paint.FIREBRICK & BACK-UP INSULATION3” firebrick on top (for extra strength), 2-1/2”on other surfaces. Brick is backed up with 2”of mineral wool. It only takes about 850watts per hour to maintain temperature at2000°F. Back up insulation keeps caserelatively cool to touch. Firebrick is coatedwith a proprietary reflective ceramic coatingwhich penetrates, binds and hardens theinterior surface to reduce dusting.CERAMIC HEARTH PLATE INCLUDEDHearth is 16” wide by 13” deep by 5/8”.SHEATHED TYPE K THERMOCOUPLEFOUR LIFTING HANDLESON/OFF SWITCH AND CONTROL FUSEDOOR CUT OFF LIMIT SWITCHMULTI-VOLTAGE - EASY TO HOOK UPThe GS 1714 will operate on any single phasevoltage from 200 volts to 240 volts, 50 Hz or60 Hz. 30 amp 14-30P power cord included.OPTIONS● ANGLE IRON FLOOR STAND● MOTORIZED SIMPLE VENT SYSTEMMODEL INSIDE DIMENSIONS HEARTH OUTSIDE DIMENSIONS Door Height 240 Volt 240 Volt MAX SHIPNUMBER IW IH ID DIMENSIONS OW OH OD when open Watts Amps LOAD LBS WEIGHTGS 1714 17 12 14-1/2 16 x 13 26 32 34 45 6000 25.0 125 475Dimensions are in inches. Weight is in pounds. Working dimensions should be approximately 2” less in each direction than inside dimensions. Firing capacity isapproximately 1.7 cubic feet (.048 cubic meters). The GS1714 can operate on 200 to 240 volts single 50 Hz or 60 Hz. 3 phase is not available. At 240 Volts: 6000watts, 25.0 Amps. At 220 Volts: 5042 watts, 22.9 Amps. At 208 Volts: 4507 watts, 21.7 Amps. At 200 Volts: 4167 watts, 20.9 Amps. 30 Amp, Fuse 30 Amps, 14-30Pcord supplied (neutral not used). The furnace is inexpensively shipped by common carrier in a 44” x 44” x 40” high skidded carton (shipping class 85).HB SERIES2200°F Basic Bench Top Box FurnacesAPPLICATIONSThe HB Series furnaces are good generalpurpose industrial grade Bench Mounted BoxFurnaces. The door is an easy to operatespring loaded vertical plug door. They featurea Honeywell UDC2300 digital control forautomatic temperature control. They reach2200°F (1200°C). This series is recommendedover the GS 1714 when you need specialoptions and want a more industrial controlsystem but don’t need the features of theXLB Series.There are only elements on thesides so the uniformity is not as great as ineither the GS 1714 or the XLB Series. Thetemperature uniformity inside approximately2/3 of the furnace chamber is in the range of+/-25°F (+/-14°C) above 1300°F (705°C).Mechanical contactors are used althoughmercury contactors and SCRs are optional.Most of the options available for the XLBSeries are available on the HB Series.An HB 9 Furnace.800.459.0750Page 5

CBH 124Atmosphere Controlled Neutral Hardening Tool Room FurnaceAPPLICATIONSThe CBH124 Atmosphere Box Furnace isspecifically designed for neutral hardeningwith virtually no decarburization or oxidation.The CBH124 incorporates many features likea compact control panel and stand, pneumaticvertical door, silicon carbide hearth, door heatshield, vent hood, peephole, heavy gauge lowvoltage elements, program control, high limitcontrol, and low mass ceramic fiber insulationthat are options on many other furnaces.Thismakes for a very complete and versatilefurnace. Gas levels and resulting carbon levelsobtained with the propane or natural gas areset by experience with the manual atmospherecontrols. The maximum temperatureof 2250°F (1230°C) allows this furnace to beused for high speed tool steels. The CBH 124is highly uniform in temperature gradient. Seepage 30 for larger neutral hardening andcarburizing furnaces.FEATURESAPM HEAVY ROD OVERBEND ELEMENTSHeavy duty low voltage Kanthal APM sinterediron-aluminum-chrome alloy rod/overbendelements are standard. This alloy is highlyresistant to carburizing and will take the hightemperatures as well. Elements are located onthe sides and bottom. These are particularlysuited for carbon rich atmospheres. Withregular burnout in air they will provideexcellent life.They rely on their protectionfrom the atmosphere by forming a thinaluminum oxide coating on the surface of theelement. Because they have a thick (6 mm)cross section, they are more resistant tobreakage, cracking and embrittlement thanthinner gauge wire coiled elements.CERAMIC FIBER INSULATION2-1/2” of 2600°F (1425°C) low iron ceramicfiber board backed up with 2” of 1900°F(1035°C) board and 4” of mineral wool. Thiscombination of insulation provides very efficientheat up characteristics and low heat loss.HARD BRICK VESTIBULEA refractory vestibule protects the elements,supports the hearth, minimizes the dooropening to promote temperature uniformityand allows for a very efficient interlocking doorseal. The door seal includes a fiber gasket.HEAVY DUTY ATMOSPHERE TIGHT CASEThe case is gas tight with full gasketing. Anintegrated heavy duty stand is included.Page 6DOOR HEAT SHIELDA heat shield is attached to the furnace door.This maintains an external door casetemperature of under 120°F (50°C).BUILT IN VENT HOODA vent hood is designed into the furnace tocollect products of combustion from theburn off and unspent gases when the dooropens. This vent hood terminates in a 4”diameter standard duct fitting.PNEUMATIC LIFT DOORA pneumatic cylinder lifts and tightly seals thevertical door. The door rides in guide tracks.Door operation is with a pneumatic handoperated valve which allows the door to beraised or lowered with one switch.SILICON CARBIDE HEARTHHearth is 1” thick silicon carbide with 1/2”high molded sides. Silicon carbide hasexcellent heat transfer characteristics, remainsflat at high temperatures and is strong.PEEPHOLEA 3/4” diameter peephole allows viewing insidethe furnace without disturbing the atmosphere.NITROGEN/CARBON ATMOSPHEREThe propane or natural gas cracks intohydrogen, carbon monoxide, nitrogen and freecarbon. This counteracts the decarburizingeffect of trace oxygen and water vapor at hightemperatures. The flow system consists of anitrogen and propane or natural gas line withflowmeters, regulators, gauges, pressure reliefvalves, solenoids and shut off valves in a selfcontained flow panel (mounted under thefurnace as shown or under the control panel onthe side of the unit). An audible alarm indicatesany alarm condition. A 1400°F (760°C) alarmshuts off flammable gas. A nitrogen low flowswitch prevents flammable gas from flowingunless a minimum flow is achieved. Emergencypurge is activated if there is a power failure. Thismeets NFPA-86C standards.HONEYWELL PROGRAM CONTROLThe standard control is a Honeywell UDC3300 digital program control with six rampsand six soaks. The power control is a mercurycontactor (SCR is optional). A power transformersupplies low voltage to the elements.All fuses, contactors, and controls are locatedin a NEMA 12 panel with a fused disconnectswitch which can be mounted under thefurnace or on the side. Thermocouples areheavy-wall inconel sheathed type K. Thecontrol voltage is 120 volts. A HoneywellUDC2300 FM approved high limit back upcontrol with manual reset is included withback up contactors and separate thermocoupleelement. Furnace includes door powercut off switch. Single point power connection.Meets National Electrical Code.OPTIONS● TEMPERATURE RECORDERS● FLOOR MOUNTED DOOR SWITCH● SCR POWER CONTROL● SIDE MOUNTED CONTROLS● INTEGRATED QUENCH TANK: With pneumaticelevator. (See photo on web site).CBH 124 SPECIFICATIONS● WORK DIMENSIONS: 12” W x 12” H x 24” D● INSIDE DIMENSIONS: 17” W x 18-1/2” H x 29” D● HEARTH HEIGHT: 48-1/2” from floor● OUTSIDE DIMENSIONS: 38” W x 112” H x 70” D● KW: 12.5● VOLTS: 208/1/60, 240/1/60 or 480/1/60● MAX TEMPERATURE: 2250 o F (1230°C)● UNIFORMITY: +/-15°F above 1400°F (760°C)● MAXIMUM LOAD WEIGHT: 150 Poundswww.hotfurnace.com

XLE SERIESFirebrick Lined 2350°F Electric Box FurnacesAPPLICATIONSThe XLE Series Electric Box Furnaces arehighly uniform and controllable and widelyadaptable to many applications. In the heattreating field these include hardening, neutralhardening, solution heat treating, stressrelieving, annealing, aging, precipitationhardening, and tempering. Ceramic applicationsinclude ceramic bisque firing, thin filmprocessing, glazing, and decorating. Otherapplications include brazing, calcining, drying,melting of glass and metals, glass annealing,fusing and bending, enameling, and sintering.Although standard configurations are made,each furnace is normally fitted with standardand special options to suit specific needs.These include vertical doors, fans, coolingventuris, vents, special hearths, racks, basketsand loading devices, quenching systems,various controlled atmospheres, retorts,viewing ports, special element alloys, specialthermocouples, various kinds of alarms,program controls and recorders.This XLE 3648 featuresa hand-crank operatedvertical door, NEMA 12control panel, hightemperature fan andstrip chart recorder.FEATURESFAST HEAT UP & COOL DOWNAn empty furnace will heat up to 2000°F(1095°C) in approximately 1-1/2 hours. Thehigh KW option will typically trim this to onehour. Cool down to 500°F (260°C) is approximatelyfive hours. Optional venturi will speedcooling dramatically.EXCELLENT UNIFORMITYThe furnace is uniform to within +/-20°F(+/-11°C) above 1400°F (760°C) within theuniform working dimensions (see specificationchart). Optional multi-zone controland fan systems are available for tighteruniformity of up to +/-5°F (+/-2.8°C) or better.EVEN ELEMENT PLACEMENTEach element is separately and evenly spacedon the bottom, sides, door and back in rowsof ceramic holders. This is the finest method ofdistributing radiant heat energy at hightemperatures and is unique to L&L furnaces.ZONE CONTROL FOR HIGH UNIFORMITYThe elements are divided into top andbottom zones. The control output is routedthrough two input switches to allowadjustment of the total time on to each zone.There are thermocouples mounted top andbottom with a selector switch to read thedifferential. Special designs with up to sixzones or more and SCR power controls onseparate PID loops can be used to promoteeven greater temperature uniformity.800.459.0750TEMPERATURES TO 2350°F (1285°C)Some options such as fans and other alloycomponents may limit this temperature.LOW WATT DENSITY FOR LONG LIFEThe standard elements are coiled from highgrade iron-aluminum-chrome alloy (KanthalA-1 or the equivalent). Nickel-chrome(80-20), Chromel AA, APM and other alloysare available for special atmospheres andapplications. A watt density normally below10 watts per square inch maximizes elementlife. (Watt density is the ratio of watts tosquare inches of radiating surface area).HEAVY DUTY CASE - INTEGRATED STANDThe furnace case is constructed of 10 gaugesteel with external bracing angles welded tothe entire case and base assembly. Levelingbolts, anchoring holes and lifting rings areincluded. The main seams are continuouslywelded for an attractive appearance. Theentire case is primed inside and out with ahigh temperature silicone based paint. Thefinal coat is a heat resistant machine blueenamel. Custom colors are available. Sealedcases with full gasketing for controlledatmosphere use are optional.Page 7

A WIDE VARIETY OF HEARTHSThe standard hearth is one or more ceramicplates elevated on ceramic blocks 1-1/2”above the bottom elements. This air spaceimproves uniformity. Silicon carbide plates,alloy plates, roller hearths, baskets, racks,loaders, castable piers, air cooling tables andmany other loading options are available.CERAMIC ELEMENT HOLDERSThe elements are supported in proprietaryhigh temperature ceramic element holders.These provide perfect support for the coiledelement and excellentradiatingcharacteristics.The smooth surfaceof the holderprevents prematurefailure of theelement as it expandsand contracts.Theseholders,coupled witha unique all ceramicelement terminal, make elementreplacement easy. Being recessed into thewall of the furnace these elements are not assusceptible to mechanical damage as someother types of element support systems.CERAMIC ELEMENT TERMINALS MAKEELEMENT CONNECTIONS EASY ANDTROUBLE FREEUnique all ceramic element terminal blocksdesigned by L&L allow the element ends to beclamped without twisting the whole endaround a terminal bolt, making it easy toremove an element. The connection wires canbe easily removedwithout disturbingthe element termination(which allowsyou to easily isolatean element for aresistance check).The heavy ceramicterminal block featuresunusually good electricalisolation andprotects the wires.DOUBLE PIVOTED PLUG DOOR KEEPSHEAT AWAY FROM OPERATOR ANDALLOWS FOR TIGHT DOOR SEALThe standard door is a double pivotedhorizontal plug door. The double pivotingallows the door to open like a parallelogramwhich keeps the hot face away from theoperator. There are two heavy duty clampsfor tight sealing. Because of the completelyhorizontal motion of the door as it is sealingthere is no wear on the seal face. The doorhas a 3/4” refractory plug which protrudesinto the furnace chamber and provides ahighly effective heat lock. There is a 3-1/2”refractory to refractory seal around thePage 8perimeter of the door. Counterbalancedvertical doors with hand crank, pneumatic orelectric actuator are options. Vertical doorslift away from the furnace seal before liftingup. Strong 3/16” thick reinforced door casingprevents door from warping from heat.PRESHAPED BRICK SECTIONS SAVE ONHEAT LOSS AND MAINTENANCE COSTSThe firebrick is cemented in sections on avery flat table. These sections are thenprecision cut and routed. All sections fittogether with engineered heat locks whichimprove the insulating integrity of the furnaceeven after many years of service. Bricksections can easily be installed by in-housemaintenance personnel saving on expensiveand hard-to-find specialized bricklayer labor.All refractory is coated with a special facingthat prolongs firebrick life and helps preventspalling and dusting.EFFICIENT MULTILAYERED INSULATIONThe furnace is insulated with 4-1/2” of low Kfactor refractory firebrick backed up by 2” ofmineral wool board on all surfaces except thebottom, which has 2” of hard calcium silicateback up for solid hearth support. This yieldsan excellent combination of strength, insulatingquality, and fast heat up and cool downtimes. The roof of all models which are 24”wide or wider is made from 2600°F (1425°C)ceramic fiber modules to prevent roof failure.SIDE MOUNTED CONTROL PANEL WITHHINGED DOOR HOLDS ALL COMPONENTSAll temperature controls, relays, contactors,power controls, switches, transformers andfuses are located in a side mounted NEMA 1control panel with a gasketed hinged door.An oil tight NEMA 13 lighted on/off pushbuttonswitch turns the furnace on. Controlsare mounted at eye level for easy visibility. ANEMA 12 panel with fused disconnect switchis optional. A panel cooling fan is includedwith SCR power controls.DIGITAL HONEYWELL UDC2300 PIDTEMPERATURE CONTROLA Honeywell UDC2300 microprocessorbased digital single set point control isstandard. Two full vacuum fluorescentdisplays include English language programminginformation for easy set up. This is one of theeasiest digital controls to operate. Accuracyis .25% of scale. All PID tuning constants(proportioning band, reset, rate) plusmaximum temperature, scale range, thermocoupletype and many other parameters areprogrammable. Ramp/Soak programming isoptional. Multi-zone UMC800 controls arealso used. Other controls are optional.DIGITAL HIGH LIMIT CONTROLA Honeywell UDC2300 digital high limitcontrol, complete with back up contactorsand separate thermocouple, shuts off furnaceif temperature or power control fail.MERCURY CONTACTORS FEATURE FASTCYCLE TIME FOR ACCURATE CONTROLOther benefits are long contactor life and quietoperation. SCR power controls are optional.TYPE K THERMOCOUPLES WITHSHIELDED EXTENSION WIREType S platinum thermocouples are optional.MANY SAFETY FEATURESThermocouple break protection is included.Limit switches shut off power to furnace ifthe door is opened or the power panel backis removed. Control voltage is transformedto 120 volts. The control and branch powercircuits are fully fused.This is a very typical XLE 246 with cast piers and a standard double pivoted horizontal door.www.hotfurnace.com

XLE OPTIONS● VERTICAL DOORS: Pneumatic, hand crankor electric gear drive operated. Door iscounterbalanced. Special safety latches can besupplied.● PROGRAM CONTROLS: Any make.Multi-program controls. Computer interfacedcontrols with communications.● MULTIPLE HEATING ZONES: For theutmost in temperature uniformity L&L couplesits unique even element design with multi-zoning(four to sixteen in an XLE furnace. Typically weuse a Honeywell UMC800 and SCR powercontrols to manage the control).● FANS: Various fans for temperatures up to2200°F for high uniformity and even atmospheredistribution. Motors are air cooled up to 1875°F.● TEMPERATURE RECORDERS: Roundchart, strip chart, paperless recorders as well asdataloggers (like the UMC800) are available.● SCR POWER CONTROLS: These makecontrol finer with less cycling.● ATMOSPHERE CONTROL: Case is sealed forinert atmospheres. Atmosphere panels withmanual or automatic shut off systems areavailable. Up to 4% hydrogen or othercombustible gas can be used.● NEMA 12 CONTROL PANEL: With fuseddisconnect switch.● VIEWING PORTS, SURVEY PORTS● VENTS AND VENTURIS: Manual orpneumatic dampers, 300, 600 and 1250 CFMventuris for fast cooling and/or venting.● SPECIAL HEARTHS AND LOADERS:Silicon Carbide and alloy, baskets, racks, rollerhearths, special loading devices. The one belowwill handle 2000 pounds. Also see page 3.This is a special 2000 pound loader with a motorizedmover for heavy loads. It runs on a railroad type track. Adeadman joystick control operates the drive system. The handleat the back is the hand pump for the hydraulic lift system.XLE SPECIFICATIONSACTUAL UNIFORM EXTERNAL OPTIONAL STAND APROXINSIDE WORK HEARTH DIMENSIONS VERTICAL KW RATINGS LOAD SHIPMODEL DIMENSIONS DIMENSIONS DIMENSIONS STAND DOOR DOOR STAND HIGH WEIGHT WEIGHTNUMBER W H D W H D W D W H D HEIGHT KW KW LBS LBSXLE 524 16 18 25 13 13 20 13 22 54 59 48 99 13.5 18.0 175 1600XLE 814 19 15 25 16 10 20 16 22 57 56 48 93 14.0 18.0 200 1700XLE 816 19 15 37 16 10 32 16 32 57 56 60 93 19.0 25.0 300 1900XLE 824 19 21 25 16 16 20 16 22 57 62 48 105 17.0 22.0 200 1800XLE 836 19 21 37 16 16 32 16 32 57 62 60 105 22.5 29.0 300 2100XLE 848 19 21 49 16 16 44 16 44 57 62 72 105 27.0 36.0 400 2500XLE 214 25 21 25 22 16 20 22 22 63 62 48 105 20.0 26.0 300 1900XLE 236 25 21 37 22 16 32 22 33 63 62 60 105 27.0 35.0 450 2200XLE 244 25 27 25 22 22 20 22 22 63 68 48 117 27.0 35.0 300 2100XLE 246 25 27 37 22 22 32 22 33 63 68 60 117 31.5 42.0 450 2400XLE 248 25 27 49 22 22 44 22 44 63 68 72 117 38.0 49.5 600 2800XLE 272 25 27 73 22 22 68 22 66 63 68 96 117 51.0 68.0 900 3500XLE 448 25 51 25 22 46 20 22 22 63 93 48 N/A 38.0 49.4 300 2900XLE 3248 31 27 49 28 22 44 28 44 69 68 72 117 48.0 64.0 700 3100XLE 3260 31 27 61 28 22 56 28 56 69 68 84 117 55.0 71.5 850 3500XLE 3272 31 27 73 28 22 68 28 66 69 68 96 117 59.0 78.5 1000 3900XLE 3348 31 33 49 28 28 44 28 44 69 74 72 129 48.5 65.0 700 3400XLE 3360 31 33 61 28 28 56 28 56 69 74 84 129 60.0 78.0 850 3800XLE 3372 31 33 73 28 28 68 28 66 69 74 96 129 66.5 88.5 1000 4200XLE 3436 37 27 37 34 22 32 32 32 75 68 60 117 40.0 52.0 600 2900XLE 3448 37 27 49 34 22 44 32 44 75 68 72 117 48.0 64.0 900 3400XLE 3472 37 27 73 34 22 68 32 66 75 68 96 117 66.0 88.0 1200 4200XLE 3636 37 39 37 34 34 32 32 32 75 80 60 141 51.0 61.3 600 3300XLE 3648 37 39 49 34 34 44 32 44 75 80 72 141 56.0 66.5 900 3900XLE 3672 37 39 73 34 34 68 32 66 75 80 96 141 82.0 109.0 1200 4800XLE 4060 42 39 61 39 34 56 36 56 79 80 84 141 70.0 91.0 1000 4600XLE 4080 42 39 81 39 34 76 36 76 79 80 104 141 96.0 125.0 1500 5400Dimensions are in inches. External dimensions include typical control panel mounted on right side. Standard voltages supplied are 480, 240, 208, 380 and 575. Threephase or single phase is available. Heavier loading weights are optional. Tighter uniformity can be achieved by using a smaller portion of the work space.800.459.0750Page 9

QD SERIESDual Chamber Hardening/Tempering FurnacesAPPLICATIONSThe QD Series Dual Chamber Heat TreatingFurnaces feature a 2350°F (1285°C) high heatchamber for hardening and a 1250°F (675°C)recirculating oven for tempering. Theover/under configuration saves floor space.The hardening furnace is mounted on topwith the tempering oven below. Agitated andheated quench tanks are optional. Thefurnaces achieve high precision by featuringhighly accurate controls, mercury contactorsfor fast cycle times, two zone control (topand bottom) on the hardening furnace, andvery even spacing of elements. The temperingoven features a powerful fan and recirculationmuffle for high uniformity. The furnaceconstruction is similar to the XLE Series.FEATURESHIGH TEMPERATURE UNIFORMITYThe hardening furnace is uniform to within+/-20°F (+/-11°C) above 1500°F (815°C).The tempering oven is uniform to within+/-10°F (+/-5.5°C) above 300°F (150°C).TWO ZONES AND EVEN ELEMENTSThe elements of each furnace are divided intotop and bottom zones. The elements of thehardening furnace are evenly spaced on thedoor, back, sides and bottom. The elementsare supported in proprietary ceramicelement holders. These provide perfect supportfor the coiled element as well asexcellent radiating characteristics. Thesmooth surface prevents premature failure ofthe element as it expands and contracts.Iron-aluminum-chrome alloy elements arestandard.EFFICIENT MULTILAYERED INSULATIONBoth chambers are insulated with 4-1/2” oflow K factor refractory firebrick as theprimary insulation.This is backed up by 2” ofvery low K factor mineral wool board on allsurfaces except the bottom which has 2” ofhard calcium silicate back up for solidhearth support. This yields an excellentcombination of strength, insulating qualityand fast heat up and cool down time. Allrefractory is coated with a special facingthat prolongs firebrick life and helpsprevent spalling and dusting. The refractorysections are available completely shapedfor easy replacement without cementing.HEAVY DUTY CASEBoth chambers are mounted in anintegrated 10 gauge steel case withstiffeners, leveling bolts and lifting rings.DOUBLE PIVOTED DOORSBoth doors are double pivotedhorizontal doors with insetrefractory plugs for a superbheat lock around the door seal.The double pivoting allows thedoor to be opened so that thehot face stays away from theoperator. Vertical door forhardening furnace (as shown inphotograph) is optional.FAN AND RECIRCULATIONMUFFLE IN TEMPERING OVENThe tempering oven features a back mountedalloy fan. It is belt driven with a 3/4 hp motor. Aheat dissipator protects the bearings. Theremovable recirculation muffle is constructed of304 stainless steel. This has a solid bottom for useas the hearth. The muffle protects the work fromdirect radiation of the elements and creates arecirculation pattern for the air. The hardeningfurnace comes with a ceramic hearth.DIGITAL HONEYWELL PID CONTROLSStandard controls are Honeywell UDC2300digital PID controls. All fuses, transformers,switches, contactors and controls are housedin a NEMA 1 panel. Quiet, long life mercurypower contactors are standard. Limit switchesshut off furnace power when doors areopened or the backs are removed. LightedNEMA 13 on/off switch is included.OPTIONS● NEMA 12 PANEL OPTION: Includes a fuseddisconnect switch.● HIGH LIMIT CONTROLS● HIGH KW: Available on hardening furnace.● SCR POWER CONTROL● INERT ATMOSPHERE CONTROL● RAMP/SOAK PROGRAM CONTROLS● TEMPERATURE RECORDERS● VERTICAL DOORS● SILICON CARBIDE HEARTHSThis QD 236 features apneumatic vertical door,atmosphere sealed caseon top, NEMA 12control panel and stripchart recorder.QD SPECIFICATIONSHARD CHAMBER HARD CHAMBER TEMP CHAMBERACTUAL UNIFORM INSIDE RECIRC OUTSIDE HARDEN TEMPER MAX APROXMODEL INSIDE DIMENSIONS INSIDE DIMENSIONS MUFFLE DIMENSIONS DIMENSIONS CHAMBER CHAMBER LOAD SHIPNUMBER IW IH ID W H D IW IH ID OW OH OD KW KW WEIGHT WEIGHTQD 524 16 18 25 12 11 20 11 11 20 54 75 56 13.5 10.0 110 2000QD 814 19 15 25 15 9 20 14 8 20 57 72 57 14.0 10.0 125 2300QD 824 19 21 25 15 15 20 14 14 20 57 84 57 17.0 12.0 150 2700QD 836 19 21 37 15 15 32 14 14 32 57 84 69 22.5 17.5 200 3300QD 236 25 21 37 21 15 32 20 14 32 63 84 73 27.0 21.0 300 3500Dimensions are in inches. Weight is in pounds. Standard voltages supplied are 480, 240, 208, 380 and 575. Three phase or single phase is available. Inside temperingchamber dimensions are also working dimensions for that chamber.Page 10www.hotfurnace.com

QDS SERIESSmall Premium Dual Chamber Hardening/Tempering FurnacesAPPLICATIONSThe QDS Series Dual Chamber Heat Treatingfurnaces feature a 2350°F (1285°C) high heatchamber for hardening and a 1250°F (675°C)recirculating oven for tempering. Theover/under configuration saves floor space.The hardening furnace is mounted on topwith the tempering oven below. Agitated andheated quench tanks are optional (See pages28 & 31). The furnaces achieve high precisionby featuring highly accurate controls, mercurycontactors for fast cycle times, two zonecontrol (top and bottom) on the hardeningfurnace, and very even spacing of elements.The tempering oven features a fan andrecirculation muffle for high uniformity. TheQDS 124 is our most popular dual chamberfurnace. The furnace chamber construction issimilar to the XLB Series.FEATURESSIMILAR TO QD & XLB SERIESThe QDS furnaces are similar to the QDSeries except that they are smaller and thebrick is 2-1/2” thick instead of 4-1/2” thick(like XLB Series on page 4). There are alsoelements in the top of the hardeningchamber. The fan is belt driven with a 1/6 hpmotor. The hardening furnace door is aspring loaded swing up vertical door.The spring holds the door tightlyclosed, counterbalances it whileopening, and holds it up while open.The hot face of the door is kept awayfrom the operator. It has most of thesame options as the QD Series.HIGH TEMPERATURE UNIFORMITYThe hardening furnace is uniform to within+/-20°F(+/-11°C) above 1500°F (815°C). Thetempering oven is uniform to within +/-10°F(+/-5.5°C) above 300°F (150°C).QD 29Small Economical Dual Chamber Hardening/Tempering FurnaceA QDS 124 -our mostpopular dualchamber heattreatingfurnace.APPLICATIONSThe QD 29 Dual Chamber Heat Treatingfurnace features a 2275°F (1245°C) high heatchamber for hardening and a 1250°F (675°C)recirculating oven for tempering. Theover/under configuration saves floor space.The hardening furnace is mounted on topwith the tempering oven below. A roll awayquench tank is optional. Controls are digital.The tempering oven features a fan andrecirculation muffle for high uniformity. Thisis the most economical dual chamber furnacein the QD line. It is a good basic all purposeheat treating system. The furnace chamberconstruction is similar to the HB Series.FEATURESSIDE MOUNTED ELEMENTSThe QD 29 furnace has side mountedelements, 2-1/2” brick with 2” back upinsulation.The fan is belt driven with a 1/6hp motor. The hardening furnace door isa spring loaded swing up vertical door.The spring holds the doortightly closed, counterbalancesit while opening, and holds it upwhile open. The hot face of thedoor is kept away from theoperator. It has most of thesame options as the QD Series.GOOD TEMPERATURE UNIFORMITYThe hardening furnace is uniform to within+/-25°F (+/-14°C) above 1500°F (815°C).Thetempering oven is uniform to within +/-10°F(+/-5.5°C) above 300°F (150°C).A simple rollaway quenchtank fitsunder theQD 29.QDS & QD29 SPECIFICATIONSHARDEN CHAMBER HARDEN CHAMBER TEMPER CHAMBERACTUAL UNIFORM INSIDE RECIRC OUTSIDE HARDEN TEMPER MAX APROXMODEL INSIDE DIMENSIONS INSIDE DIMENSIONS MUFFLE DIMENSIONS DIMENSIONS CHAMBER CHAMBER LOAD SHIPNUMBER IW IH ID W H D IW IH ID OW OH OD KW KW WEIGHT WEIGHTQDS 124 13 12 25 10 10 20 10 12 22 55 78 56 9.8 8.0 125 1300QDS 126 13 12 37 10 10 32 10 12 34 55 78 68 13.0 12.0 175 1600QD 29 12 8 24 9 6 20 10 8 20 55 70 56 8.0 8.0 100 1200Dimensions are in inches. Weight is in pounds. Standard voltages supplied are 480, 240, 208, 380 and 575. Single phase is normal; 3 phase is available although phaseswill be unbalanced. Inside tempering chamber dimensions are also working dimensions for that chamber.800.459.0750Page 11

FB SERIESLarge Ceramic Fiber 2200°F Electric Box FurnacesAPPLICATIONSThe FB Series Electric Box Furnaces are largegeneral purpose ceramic fiber lined furnaces.They achieve high precision by featuringhighly accurate digital controls, mercurycontactors for fast cycle times, two zonecontrol (top and bottom) and even spacing ofelements. They reach temperatures up to2200°F (1200°C) with 2600°F (1425°C) fiberand up to 2000°F (1095°C) with 2300°F(1260°C) fiber. Insulation is all ceramic fiberexcept for hearth and hearth support. Theyare available is standard sizes up to eight feetcubed and even larger in custom sizes.This is a custom size FB 4410which is 4 feet wide by 4 feet highby 10 feet deep. It includes bottomelements and a pneumatic verticaldoor. Bottom elements are unusualin these big furnaces but can beuseful for uniformity and/or addingmore KW to the system.FEATURESHIGH TEMPERATURE UNIFORMITYThe furnace is uniform to within +/-25°F(+/-14°C) above 1500°F (815°C). Optionaltop mounted recirculating fans and multizonepower controls are available foruniformity of up to +/-10°F (+/-5.5°C).EVEN ELEMENT PLACEMENTEach element is separately and evenly spacedon the bottom, sides, door and back in rowsof ceramic holders. This is the finest method ofdistributing radiant heat energy at hightemperatures and is unique to L&L furnaces.ZONE CONTROL FOR HIGH UNIFORMITYThe elements are divided into top andbottom zones. The control output is routedthrough two input switches to allowadjustment of the total time on to each zone.There are thermocouples mounted top andbottom with a selector switch to read thedifferential. Special designs with up to sixzones or more can be used to promote evengreater temperature uniformity.CERAMIC ELEMENT HOLDERSThe elements are supported in proprietaryceramic element holders. These provideperfect support for the coiled elements aswell as excellent radiating characteristics. Thesmooth surface prevents premature failure ofthe element as it expands and contracts. Theholders are kept in place on the insulationwalls with specially designed ceramic clampsand screws. These fasten to a stainless steelmesh screen which is an integral part of theinsulation modules. See web site for details.CERAMIC FIBER INSULATION FEATURESFAST HEAT UP AND COOL DOWNThe sides of the furnace are insulated with 8”of low density ceramic fiber and mineral woolboard. The top is insulated with 10 pounddensity 8” ceramic fiber modules.Page 12HEARTHS AND LOADING SYSTEMSThe hearth is typically insulated with ceramicfiber, firebrick sections or light weight buttough insulating castable refractory slabs. Thestandard hearth is a flat castable floor.Castable piers for forklift loading areoptional. An option for a convenient loadingsystem is a serpentine alloy hearth tray whichis loaded into the furnace with a hydraulicallyoperated loader (see page 13). Other hearthssuch as alloy rollers are available.DOOR AND SEALThe door seal is a folded pad of ceramic fiberblanket which seals against a rigid ceramicfiber board attached to the case front. Thestandard furnace door is horizontally openingwith a double-pivoted hinge which allowsparallelogram opening of the door. This keepsthe hot face of the door away from theoperator and allows tight sealing of the door.Four hand wheels clamp the door tightlyagainst the front seal. Pneumatic or electricallyoperated vertical doors are optional (theseare particularly useful when loading andunloading the furnace hot).DIGITAL PID CONTROL AND HIGH LIMITStandard controls include a Honeywell UDC2300 digital control and separate high limitback up control. Mercury contactors arestandard; SCR power controls optional.OPTIONS● NEMA 12 PANEL OPTION: Includes a fuseddisconnect switch.● RAMP/SOAK PROGRAM CONTROLS● TEMPERATURE RECORDERS● SCR POWER CONTROLS● MULTI-ZONE CONTROL: with a UMC800.● HIGH TEMPERATURE FANS● ATMOSPHERE CONTROL● POWERED VENTURI FOR COOLING● PNEUMATIC VERTICAL DOOR● LOADERS: See pages 3, 9 & 13.● HEAT SHIELD: For 120°F (20°C) case temperatures.● BOTTOM ELEMENTS● ALSO SEE XLE OPTIONS: See page 9www.hotfurnace.com

FB SPECIFICATIONSMODEL WORK DIMENSIONS INSIDE DIMENSIONS OUTSIDE DIMENSIONS WORK LOAD SHIPNUMBER W H D W H D W H D CU FEET KW WEIGHT WEIGHTFB 333 36 36 36 42 42 42 84 88 69 27 64 675 4200FB 334 36 36 48 42 42 54 84 88 81 36 76 900 4900FB 336 36 36 72 42 42 78 84 88 105 54 100 1350 6300FB 444 48 48 48 54 54 54 96 100 81 64 105 1200 5900FB 446 48 48 72 54 54 78 104 92 102 96 136 1800 7300FB 555 60 60 60 66 66 66 116 104 90 125 157 1875 7700FB 666 72 72 72 78 78 78 128 116 102 216 219 2700 10000FB 888 96 96 96 102 102 102 152 140 126 512 375 4800 15800Dimension are in inches (except for Working Cubic Feet). Weight is in pounds. Standard voltages supplied are 480, 240, 208, 380 and 575. Three phase or single phaseis available. Special sizes are commonly made - the above sizes are only representative. Heavier load weights are possible. Outside dimensions are for a horizontal doorand include the side mounted control panel. Fans reduce inside working height by 12”.FN SERIESAtmosphere Box Furnaces with Certifiable Uniformity of ± 5°F from 300°F to 2200°FAPPLICATIONSThe FN Series Ultra Uniform Electric BoxFurnaces feature extremely uniform temperaturegradients over a wide temperature range.The other essential feature is very tightatmosphere construction. Uniform distributionof elements, fan circulation of furnaceatmosphere, ceramic fiber insulation, six ormore zones of element control, SCR powercontrol, generous extra area inside the furnaceto keep direct radiation of elements at aminimum and a very tight gasketed andinterlocked door seal make the FN Seriesunique. Atmospheres may be air, inert orcombustible. The uniformity specification isguaranteed from 300°F (150°C) to themaximum temperature of the furnace. Themaximum temperature rating depends on thetype of fan used, type of elements and grade ofinsulation. Three temperature ranges areoffered: 1800°F (980°C), 2000°F (1095°C), and2200°F (1200°C).These furnaces are ideal foraviation work or any critical heat treating thatrequires certifiable uniformity. The designdetails are carefully thought out for convenienceof use, service and flexibility.FN SPECIFICATIONSFEATURESINSULATION & ELEMENTS LIKE FB SERIESHEAVY DUTY ATMOSPHERE TIGHT CASEEVENLY DISTRIBUTED ALLOY ELEMENTSSIX ZONES OR MORE OF CONTROLThe element circuits are broken into six ormore separate zones. +/-5°F (+/-2.8°C) modelsare controlled with six separate SCR powercontrols with a UMC800 multi-loop control.CIRCULATING FANSOne or more fans circulate the furnaceatmosphere and promote uniformity.ELECTRIC VERTICAL DOOR WITH FOURPOWERFUL PNEUMATIC CLAMPSThe standard door is a counterbalancedvertical door driven by an electric brakemotor. When the door is in the full downposition, four powerful pneumatic clamps pullthe door horizontally closed tight against thetwo independent gasket seals and into theheat interlock.The main gasket is a wide padof ceramic fiber. This is augmented by atadpole gasket and a precision interlockinghard fiber plug that protrudes from the doorinto a matching notch in the furnace case seal.This is anFN 545with aloader andserpentinehearth.The photo on the frontcover is an FN Series furnace.This three way seal ensures both theatmosphere and heat seal. Silicone rubberseals are also available for even tighteratmosphere control.WORK INSIDE OUTSIDE MAXMODEL DIMENSIONS DIMENSIONS DIMENSIONS STANDARD HIGH LOAD SHIPNUMBER W H D IW IH ID OW OH OD KW KW WEIGHT WEIGHTFN 222 24 24 24 36 48 36 72 185 65 40 60 400 5,500FN 223 24 24 36 36 48 48 72 185 77 55 80 600 6,000FN 324 36 24 48 48 48 60 84 185 89 90 125 1200 7,500FN 326 36 24 72 48 48 84 84 185 113 125 175 1800 9,000FN 434 48 36 48 60 60 60 96 226 89 120 165 1600 9,000FN 436 48 36 72 60 60 84 96 226 113 150 225 2400 10,000FN 545 60 48 60 72 72 72 108 238 101 155 225 2500 10,000FN 546 60 48 72 72 72 84 108 238 113 180 265 3000 11,000FN 555 60 60 60 72 84 72 108 240 101 160 225 2500 11,000FN 646 72 48 72 84 72 84 120 240 113 225 300 3600 13,000FN 666 72 72 72 84 96 84 120 240 113 240 315 3600 15,000Dimensions are in inches. Weight is in pounds. Add another 30” to width for control panel and 30” for atmosphere panel. Hearth height is typically 42”. Special sizesare available. Standard voltages supplied are 480, 240, 208, 380 and 575. Three phase or single phase is available. Higher KW is available. Special sizes are available.800.459.0750Page 13

XLC SERIESAlloy Retort Furnaces (for Hydrogen and Low Dew Point Inert Atmospheres)APPLICATIONSThe XLC Series Atmosphere Retort Furnacesrepresent an advanced design whichemphasizes process quality and control as wellas operator safety. The control system, alloyretort and flow system are completelyintegrated as one unified system. Any applicationrequiring 100% hydrogen or a mix ofhydrogen,carbon monoxide,natural gas orany other combustible atmosphere (aswell as any purely inert atmospheres) maybe used in the XLC Series. Hydrogenbrazing, magnetic steel processing, specialcoatings and stainless steel annealing aretypical examples. Any batch process thatcannot tolerate oxygen or that requires a highdegree of atmosphere reliability, repeatabilityand low dew point is a candidate for thisfurnace. Maximum temperature is 2200°F(1200°C) with Inconel retorts. Dependingon the purity of the gas used thesefurnaces can maintain a dew point aslow as -60°F (-50°C).FEATURESThis XLC 3348 shows the typical door cart and hydrogen control panel. The retort is“D” shaped corrugated inconel for the highest possible strength. A venturi cooler is also shown.FURNACE IS BASED ON XLE SERIESThe furnace system is a modified XLE Serieselectric furnace. (See pages 7-9).ALLOY RETORT FOR LOW DEW POINTThe XLC furnaces features an alloy retort totightly contain the atmosphere.This preventsoxygen infiltration, providing a very low dewpoint for clean processing and safe operation.Depending on the size and temperature,retorts are “D” shaped and/or corrugated forextra strength. The alloy normally used is 330alloy, Inconel 600 or 601, or may be otheralloys selected for specific applications.PLUG RETORT DOOR WITH SILICONERUBBER “O” RING WATER COOLED SEALRetort door is a deep plug (typically 12”deep) that protrudes into the retort cavity.The inside of the plug is insulated withceramic fiber. The door plug is made of thesame alloy as the retort and is completelysurrounded with the alloy rather thanexposing the refractory to the atmosphere asin some competitive designs. This insures thatno oxygen gets trapped in the insulation andlater reenters the chamber at high temperatures.There is a silicone rubber “O” ringseal around the perimeter of the machinedflange of the retort. This is cooled by waterwhich runs in an enclosed channel. Acomplete water cooling system includes aflow switch which interrupts power to thePage 14elements if there is no water flow. The dooris closed with quick release turn down latches.This forms an extremely tight seal and allowsvery low dew point operation. These sealswill withstand high pressures. Most doors(except the smallest ones) feature a cart thatholds the retort door (as shown above).Smaller doors are removed by hand.ATMOSPHERE SAMPLE PORTA sample port with a shut-off valve is provided.This is used to sample the atmosphere foroxygen, hydrogen and dew point.ATMOSPHERE CONTROLA variety of atmosphere control systems canbe provided. See page 16 for informationabout hydrogen systems. In addition, simpleregulators and flowmeters can be providedfor inert gas use. A pressure relief valve andretort pressure gauge are included.UMC800 CONTROL WITH PLC LOGICThe standard control for hydrogen systems isa Honeywell UMC800 program control withPLC logic control of the safety system. Inertsystems use a UDC2300 digital control. Allfuses, transformers, contactors and controlsare housed in a NEMA 1 panel. If hydrogen isused then a purged NEMA 12 control panel isstandard. Quiet, long life mercury powercontactors are standard, but the SCR powercontrol option is recommended for longerretort life. The thermocouple is a sheathedtype K inserted into the retort. Limit switchesshut off furnace power if the door is openedor the power panel back is removed.UDC2300 digital high limit back up controlwith manual reset, back up contactors andseparate thermocouple included.The thermocouplefor the high limit control is locatedbetween the retort and the elements.OPTIONS● REMOVABLE RETORT SYSTEM: Removableretorts allow faster cool down under atmosphere.However, retort life is reduced because of heatshock. This option is available only on the smallerretorts (10” & 12” wide retorts). Includesintegrated cart and track.● UMC800 DATALOGGER: The UMC800 caninclude a data recorder with up to 64 points of datainput.● POWERED VENTURI VENT: A 300, 600 or1250 CFH motor powered venturi will shorten thecool down rate of the furnace, especially in thelower temperature ranges. The venturi pulls cool airaround the outside of the retort without disturbingthe atmosphere inside. This is highly recommendedfor quicker turn-around, higher production ratesand lower atmosphere consumption. See page 3 andabove photograph.www.hotfurnace.com

XLC SPECIFICATIONSINSIDEOUTSIDEMODEL RETORT DIMENSIONS FURNACE DIMENSIONS STANDARD HIGH MAX LOAD MAX LOAD SHIPNUMBER IW IH ID OW OH OD KW KW LBS @ 2000°F LBS @ 2200°F WEIGHTXLC 524 10 10 22 34 57 64 13.5 18.0 50 25 1500XLC 824 12 12 22 37 60 64 17.0 22.0 75 35 1800XLC 836 12 12 34 37 60 76 22.5 29.0 100 50 2100XLC 848 12 12 46 37 60 88 27.0 36.0 150 75 2400XLC 244 18 18 22 43 66 64 27.0 35.0 100 50 2600XLC 246 18 18 34 43 66 76 31.5 41.0 175 85 3000XLC 248 18 18 46 43 66 88 38.0 49.5 225 110 3500XLC 272 18 18 70 43 66 112 51.0 68.0 350 175 4000XLC 3348 24 24 46 49 68 88 48.5 65.0 275 135 3800XLC 3372 24 24 70 49 68 112 66.5 88.5 400 200 5500XLC 3448 30 18 46 55 62 88 48.0 64.0 350 175 4000XLC 3472 30 18 70 55 62 112 66.0 88.0 550 275 6000XLC 3648 30 30 46 55 74 88 56.0 66.5 350 175 4800XLC 3672 30 30 70 55 74 112 82.0 109.0 550 275 7000Other sizes are available. Dimensions are in inches. Weight is in pounds. Working dimensions should be approximately 1” less in each direction than inside retortdimensions depending on uniformity requirements. The front 6” tends to be cooler and hence less uniform in temperature because of heat loss at door. Standard voltagessupplied are 480, 240, 208, 380 and 575. Three phase or single phase is available. Add 72” to Outside Furnace Dimension width for required floor space for controlpanels. Hearth height is approximately 32” from floor.JSC SERIESVertical Lift Bell Shuttle Retort FurnacesAPPLICATIONS & FEATURESThe JSC Series is an Electric Vertical Lift BellShuttle Retort Furnace for use with low dewpoint atmospheres (like the XLC Series). Atypical system includes one plug insulatedbase, one bell shaped round alloy retort, onevertical lift bell furnace, one separateinsulated “parking” base, and an overheadhoist and shuttle system. However, it can havemultiple retorts and bases as shown in thephotograph. The control system, alloy retortand flow system are completely integrated asone unified system. Any application requiring100% hydrogen, a mix of hydrogen or anyother combustible atmosphere (as well as anypurely inert atmospheres) may be used in theJSC Series. Hydrogen brazing, special coatings(such as on turbine blades), magnetic steelprocessing, stainless steel annealing andsolution treating are typical examples. Anybatch process that cannot tolerate oxygen orthat requires a low dew point is a candidatefor this furnace. Maximum temperature is2200°F (1200°C) although lower maximumtemperatures are recommended for longretort life. The system is ideal for quick cooldown under controlled atmosphere conditions.The round retort holds up well to thestress of heating and cooling and is nevermoved while hot. The type of alloy used isdependent on the temperature and application.Inlet, outlet and thermocouples aremounted through the bottom base assembly.The base features an insulation plug which is800.459.0750completely covered with alloy so that nowater vapor can get trapped in the insulationand outgas to the work chamber. There is asilicone rubber “O” ring seal around theperimeter of the retort. This is cooled bywater which runs in an enclosed channelThis is a model JSC 2436 with two retort bases,two hydrogen atmosphere panels and a resting base in the center.around the perimeter of the base. The retortis secured with quick release bolt downlatches. This forms an extremely tight sealand allows very low dew point operation (upto -60°F / -50°C).The most popular size of theretort is 24” diameter by 36” high.Page 15

H2 SERIESHydrogen Control Panels and Safety Systems for Alloy Retort FurnacesAPPLICATIONSThe H2 Series Flow Control System isdesigned for introducing and controllinghydrogen in a closed retort batch furnace likethe XLC and JSC Series. The safety systemexceed the NFPA-86C (National Fire ProtectionAssociation) standards for controlledatmosphere furnaces. With this system hydrogenmay be introduced into a furnaceretort at any temperature. Hydrogen is usedfor bright annealing of stainless steel andcopper alloys, chemical reductions, magneticsteels, coatings, brazing and many otherprocesses. Flow rates and ranges areengineered for specific systems althoughtypical flow rates are three to ten volumechanges per hour.FEATURESATMOSPHERE FLOW CONTROLThere are three separate flow systems, onefor hydrogen, one for purge gas and one foremergency purge. All three lines includeseparate shut off valve, pressure regulator,relief valve, pressure gauge, solenoid forautomatic shut off, flowmeter with regulatingvalve and check valve. In addition thehydrogen line includes a low flow switchwhich will shut off hydrogen if flow is notsufficient to maintain positive retort pressure.A delay timer temporarily bypasses theswitch for hydrogen introduction. A flamearrestor is also on the hydrogen line. The twopurge lines include pressure switches tomonitor the ability of the purge gas to flow incase of an alarm condition. Low pressureopens solenoids from both lines. Purge gasmay be nitrogen, argon or helium - althoughargon needs special engineering to workproperly. A totally separate emergency inertgas purge line includes a normally opensolenoid for automatic actuation. Emergencypurge is activated in case of a power failure.INERT PURGE IN ELEMENT CHAMBERThe furnace has a separate inert atmospherepurge between the outside of the retort andthe elements. This has its own flowmeterwith regulating valve and branches off theinert process gas purge. This protects thesystem in case of a leak in the retort. It isespecially important when operating withhydrogen below 1400°F (760°C). A low flowswitch will initiate emergency purge if there isa low flow of purge gas around the retort.Page 16ELECTRIC BURN OFF IGNITORAn electric ignitor maintains a positiveignition source at the gas exit. The systemsignals an alarm to shut off hydrogen if theignition source is lost.WATER COOLING SYSTEM & ALARMOn retorts that have water cooled seals amanual ball valve shut off, flowmeter andregulating valve, relief valve and low flowswitch are included plus hook ups for theinlet and outlet. The low flow alarm turns offelement power and hydrogen flow and theninitiates a purge. Self-contained circulatingwater cooling systems are also available.VISUAL AND AUDIBLE ALARMSAn audible buzzer with silencer is provided toindicate any alarm condition. In addition,control indicators or pilot lights indicateprecisely which alarm conditions areactivated and what gasses are flowing. Thesilencer does not turn off indicators.PURGED CONTROL PANELThe main electrical control panel is purgedwith instrument air or nitrogen. A differentialswitch must be activated for the controlsystem to operate. All electrical componentsthat are in the hydrogen flow area are eitherexplosion proof, intrinsically safe or renderedsafe per N.E.C. (National Electrical Code)articles 500 and 501.LOW TEMPERATURE ALARMA temperature based alarm can be set at anytemperature (normally 1400°F / 760°C) belowwhich hydrogen shuts off. This is not strictlynecessary when using the purge in, purge outmethod of hydrogen introduction or removal;however, it is an extra level of safety that canbe used when desired.LOSS OF EXHAUST VENTILATIONA differential pressure switch installed in theventilation system initiates purge and shuts offall power in the case of low ventilation flow.SAFETY REGULATIONSThis atmosphere system meets or exceedsthe standards of the National Fire ProtectionAgency for controlled atmosphere furnaces(NFPA-86C). L&L will provide all necessaryinformation to customer’s insurance carrieror other authorities for approval purposes.ATMOSPHERE INSTRUCTIONSA very complete instruction manual includestheory of operation, full maintenanceinstructions and schedules, component lists,component instructions, data sheets, emergencyprocedures, cautions, start up and shutdown procedures and a complete flowschematic of the atmosphere system.INTRODUCTION OF HYDROGENThe hydrogen must be introduced into thefurnace manually by activating a switch on thecontrol panel. This is according to theNFPA-86C standards. An automatic purgecycle with automatic introduction ofhydrogen is not allowed. Using the “purge in”method the operator must twice confirmthat the oxygen content inside the furnace isbelow 1% before introducing hydrogen.OTHER GASSES AND PANELSOther gasses such as ammonia, carbondioxide, carbon monoxide, oxygen, etc. can beintegrated into the gas mixing panel withappropriate safety systems. In addition wemake nitrogen/methanol panels (see page 30)and nitrogen/propane or natural gas panels(see page 6). We only make atmospherepanels for our own furnaces.OPTIONS● OXYGEN/HYDROGEN ANALYZER: Nova340 Portable combination oxygen and hydrogenanalyzer is commonly supplied. This meets the NFPArequirements for gas analysis when doing the purgein, purge out method of hydrogen introduction andremoval. Includes power supply and pump.● DELTA F OXYGEN ANALYZER: Model PA31525 A-Plus. An alarm prevents hydrogen fromflowing and initiating a nitrogen purge at any timeif oxygen level rises above 1%.● HYDROGEN LEAK MONITOR: Monitorsroom air. Calibrated for 1/4 of the LEL (1%hydrogen). An alarm output from this sensor shutsoff hydrogen and activates audible alarm.● BUBBLER FOR WET HYDROGEN: A manualor event driven bypass allows the hydrogen to bepiped through a bubbler to make wet hydrogen.Automatic PID control is also optional.● MASS FLOWMETERS: One or more of theatmosphere lines can have a mass flowmeter tocontrol the flow rates very precisely. This can berecorded with an output to a datalogger.● HYDROGEN HIGH FLOW SWITCH: A highflow switch shall initiate purge when 150% ofprocess requirements are exceeded.● STAINLESS PIPING FOR HYDROGEN: Allflow components in the hydrogen line and allpiping and fittings can be made of stainless steel.Compression fittings or all welded connections canbe used. Also piping and components can becleaned for oxygen service.● INSTRUMENT AIR FILTERS FOR PANELPURGE: Two special Balston filters convertcompressed air into instrument quality air for thepanel purge.● START UP & TRAINING SERVICE: Two tothree days is typical.www.hotfurnace.com

TB & TBU SERIESCeramic Fiber Lined Tube Furnaces for 2100°FAPPLICATIONSThe TB Series Electric Tube Furnaces and TBUSeries High Uniformity Three Zone TubeFurnaces are sold as highly customized specialfurnaces. They feature even heating aroundthe perimeter of the tube, ceramic fiberinsulation, and split tube construction for easymaintenance. A variety of tubes may be usedor supplied by L&L depending on the application.The TB and TBU Series are normallylimited to 2100°F (1150°C). Elements arerated for 2200°F (1200°C). Completeatmosphere systems are typically supplied. Afew examples of L&L’s special work areshown below. The TBU Series feature at leastthree zones of heating and sometimes moredepending on the uniformity requirements.Complete specifications of standard sizes areavailable in separate technical bulletins.Custom sizes are available.FEATURESA WIDE VARIETY OF SIZESElement diameters from 1” to 16” and evenlarger can be made. Almost any length can bemade. See our web site for more information.LOW MASS INSULATIONThe furnace is typically insulated with 6” ofceramic fiber and mineral wool insulation. Theinsulation has a very low thermal mass andhence heats up and cools down very quickly.CERAMIC FIBER MOLDED ELEMENTSElements are embedded in ceramic fiber andare made of iron-aluminum-chrome alloy.Element sections are replaced easily. Theelements are evenly spaced along the entiresurface of the interior and hence will providethe maximum in temperature uniformity byuniformly radiating along the entire surface ofthe tube.The insulation is fitted with moldedvestibules at both ends. These protect theelements and hold the tube in place.OPTIONS● MORE THAN THREE ZONES● MULTI-ZONE UMC800 CONTROL● OVERTEMPERATURE SYSTEM● PUSHERS● COOLING CHAMBERS● NEMA 12 PANEL OPTION: Includes a fuseddisconnect switch.● ATMOSPHERE CONTROL: Inert atmosphereand combustible atmosphere systems are bothavailable (See pages 16 & 30).● TUBES AND RETORTS: Alloy retorts made of304, 330 or 601 alloys, typically with water cooled“O” ring seals, as well as ceramic and quartz tubesare available.● TEMPERATURE RECORDERS● ANGLE IRON STANDS● HEAT SHIELDSThis is a special tube furnace with ahydrogen and oxygen controlsystem and acooling chamberwith a heater. It isused for modelingsteel processingcycles.This is a simple TB 224with a ceramic tubeopen on both ends.This is a TBU 1424 with a hydrogen retort and H2 Atmosphere panel.Thishydrogentube furnaceis used forprocessingmonochromaticglass. It is uniformto within +/- 2°F.800.459.0750Page 17

XLG SERIESMulti-Burner High Velocity Gas Fired Box FurnacesAPPLICATIONSThe XLG Series Furnaces aremulti-purpose Gas Fired BoxFurnaces.They are highly uniformin temperature and feature accuratedigital controls and multiplemedium or high velocityEclipse “Thermjet” proportionallycontrolled burnerswith an independent combustionblower. The XLG furnacescan be rated as high as 2400°F(1315°C) although the typicalrating is 2000°F (1095°C).Connected gas pressure canbe as low as one psi. Thecirculation of the hot gases,especially with multiple velocityburners, promotes good temperatureuniformity without the useof high temperature fans.The burners can beadjusted to run lean to provide a slightlyreducing atmosphere (although this cannotbe precisely controlled). These furnaces areexcellent for ceramics processing and mostmetallurgical work where precise atmospherecontrol is not required. Systems can bedesigned with excess air for high uniformityat low temperatures.FEATURESECLIPSE THERMJET VELOCITY BURNERSThe furnace is heated with two or more“Thermjet” medium or high velocity burners.These typically fire over the load with burnerplacement balanced to maximize circulation ofthe combustion gasses. In larger units theymay be configured to fire over and under theload. These are sized for the proper BTUrequirements for your load and fuel type. Inaddition the choice of high or medium velocityis an engineering choice dependent on loadconfiguration and furnace size. The burnersfeature low NOX emissions, integral gas andair orifice plates (for precise gas and airbalancing), high velocity for good temperatureuniformity in the furnace and excellent turndownratio of 50:1 for a wide range of control.The burners are direct ignition whicheliminates the need for a bypass pilot.FM GAS TRAIN & COMBUSTION BLOWERThe gas system includes two hydraulicmechanicalshut off valves, manual shut offvalve, pressure regulator and pressure gauges.Each burner has gas and air adjustments andshut off valves. A proportionating valve,controlled by the combustion air, maintainsPage 18This is model XLG 666 with fiveThermJet 1,000,000 BTU burners.stoichiometric air/gas ratio. Systems can bedesigned to fire with excess air for highuniformity at low temperatures. Combustionair is provided by a centrifugal blower. An airpressure gauge and switch monitor performance.IRI rated gas train is optional.ELECTRONIC FLAME SAFETY SYSTEM,SPARK IGNITOR AND PURGE TIMEREach burner is ignited with a spark plugautomatically actuated from the Eclipse Multi-Flame Series 6000 flame safety system. UV(ultra violet) sensors monitor each burner.Before ignition the system goes through atimed purge with the combustion air. Safetyinterlocks include a combustion air pressureswitch and high/low gas pressure switch.Thedigital Eclipse Multi-Flame 6000 flamemonitoring system indicates the status of theburners and gas train. It includes runningtime along with voltage signal from each UVsensor. It will alert the operator of anyproblem with the burners, air flow or gaspressure and will provide “first out” informationto actually pinpoint a problem. Theoperator only needs to press the RESET keyto restart the burner firing sequence.HIGH TEMPERATURE UNIFORMITYThe furnace uniformity is +/-15°F (+/-8.3°C)above 1200°F (650°C) within the workingdimensions. High uniformity at lowertemperatures can be achieved with excess air.EFFICIENT CERAMIC FIBER INSULATIONThe sides, back, door and top surfaces aretypically insulated with 2300°F (1260°C) ceramicfiber modules, 8” thick, 10 LB density, althoughthis is easily modified for different temperatureranges and applications.The bottom is insulatedwith a combination of castable and firebrick.Loads can be directly placed on this strongbottom. Optional castable piers (as shownabove),ceramic,silicon carbide,serpentine or flatalloy hearth plates are available.HEAVY DUTY CASEThe furnace case is constructed of heavygauge steel with structural stiffeners, liftingrings and leveling bolts.COUNTERBALANCED VERTICAL DOORThe standard furnace door is a counterbalancedvertical door with a pneumaticopener and hand or foot operated valve. (Seepage 12). Double pivoted horizontal doorsare optional (standard on 6 and 8 foot highmodels as shown above).DIGITAL CONTROL WITH HIGH LIMITThe standard control is a Honeywell UDC2300 digital PID tuning control. A UDC2300high limit control is also included. All fusesand controls are located in a NEMA 12 panel.The thermocouples are type K with inconelprotection tubes. A limit switch turns downthe burners when the door is opened.Control voltage is 120 volts.MEETS NEC, NFPA, OSHA AND FM CODESThe furnace is designed to NFPA 86standards.The wiring meets the NationalElectrical Code. The combustion systemmeets FM standards. IRI standards are available.Furnace drawings can be submitted toFM or IRI for approval.www.hotfurnace.com

XLG OPTIONS● BLOWER FILTERS● RAMP/SOAK PROGRAM CONTROLS● TEMPERATURE RECORDERS● SPECIAL HEARTHS AND LOADERS:Castable piers, silicon carbide, alloy hearths, loadbaskets and serpentine alloy hearths are available.Hydraulic lift fork type loaders are available.● SPECIAL DESIGNS: Car Bottoms, ShuttleTypes, Elevator Types, Tip Up Types.● PULSE FIRED SYSTEMSBurner blocks are along the top side; flues are at top.The gas and air train is all neatly hard piped.XLG SPECIFICATIONSMODEL WORK DIMENSIONS INSIDE DIMENSIONS OUTSIDE DIMENSIONS TYPICAL MAX SHIPNUMBER W H D W H D OW OH OD BTUS LOAD WEIGHT WEIGHTXLG 324 36 24 48 48 48 48 120 148 112 1,200,000 1800 5400XLG 334 36 36 48 48 60 60 120 172 112 1,200,000 1800 5800XLG 336 36 36 72 48 60 84 120 172 136 1,500,000 2700 7300XLG 444 48 48 48 60 72 60 132 196 112 1,500,000 2400 6800XLG 446 48 48 72 60 72 84 132 196 136 2,500,000 3600 8200XLG 556 60 60 72 72 84 84 144 220 136 3,500,000 4500 9600XLG 666 72 72 72 84 96 84 156 150* 136 4,000,000 5400 11,000XLG 668 72 72 96 84 96 108 156 150* 160 5,000,000 7200 13200XLG 888 96 96 96 108 120 108 180 174* 160 6,000,000 9600 16,600XLG 8810 96 96 120 108 120 132 180 174* 184 7,000,000 12000 19300The models with 72” and 96” inside height must have horizontal doors. Dimensions are in inches. Weight is in pounds. BTUS are sized for a particular application.Standard voltages supplied are 480, 240, 208, 380 and 575. Three phase or single phase is available. Larger sizes are available; however, loading is best accomplished witha car bottom or other special design version of this furnace. Heavier loading is available. Special sizes are available.XLM SERIESSingle Burner 2100°F Gas Fired Box FurnacesAPPLICATIONSThe XLM Series are multi-purpose Gas FiredBox Furnaces. They are uniform in temperatureand feature accurate Honeywell digitalcontrols and a single proportionally controlledburner with a 50:1 turn down ratio for accuratecontrol. The burner maintains stoichiometricgas/air ratios. The XLM furnaces reach2100°F (1135°C). Connected gas pressurecan be as low as 4” W.C. Electrical requirementsare 15 amps at 120 volts. The circulationof the hot gases promotes good temperatureuniformity without the use of hightemperature fans. The furnace is uniform towithin +/ 25°F (+/-14°C) above 1200°F (650°C)within the working dimensions. The burnercan be adjusted to run lean to provide aslightly reducing atmosphere (although thiscan not be precisely controlled). Thesefurnaces are excellent for ceramics processingand most metallurgical work where preciseatmosphere control is not required. They areparticularly useful where fumes need to bevented from the furnace, such as in wax burnout work. The single “package” type burnermakes them an economical choice in a small800.459.0750to medium size furnace. The furnace is heatedwith one Eclipse Model 50 MMB Minimaticburner with integral air and gas butterflyvalves. The burner is mounted in the furnacewith a special 2100°F (1150°C) burner blockand holder. The burner is located in the backof the furnace at the top, firing over the load.There is one flue at the back bottom on theopposite side as the burner. This location vsthe location of the burner makes the burnerflame circulate all the way around the inside ofthe chamber for maximum efficiency. Theburner can deliver up to 500,000 total Btu/Hrwith a minimum of 10,000 Btu/hr.WORK DIMENSIONS BTU/ MAX LOADMODEL W H D HOUR LBSXLM 244 24 22 24 500,000 500XLM 246 24 22 36 500,000 750XLM 248 24 22 48 500,000 1000XLM 272 24 22 72 500,000 1500XLM 3336 30 28 36 500,000 900XLM 3348 30 28 48 500,000 1200XLM 3372 30 28 72 500,000 1800XLM 3636 36 34 36 500,000 1100XLM 3648 36 34 48 500,000 1500XLM 3672 36 34 72 500,000 2200Dimensions are working dimensions. Inside dimensions are greater.This is amodel XLM 3672.Page 19

DV & DR SERIES1300°F Floor Standing Batch Tempering & Annealing Ovens (Gas or Electric)APPLICATIONSThe DV and DR Series Floor StandingRecirculating Heat Treating Ovens featurehigh volume air recirculation for high temperatureuniformity, a stainless steel interiorand plenum chamber, and a precision digitalcontrol system. They are designed for heavyduty production heat treating applicationssuch as tempering, annealing and solutionheat treating, although they find many otheruses. They are rated to 1300°F (700°C).1400°F (760°C) is optional. Horizontal doors(DV Series) or vertical doors (DR Series) areavailable. They are available in electric or gasfired versions.FEATURESRECIRCULATION FOR GRADIENTUNIFORMITY OF +/-10°F (+/-5.5°C)A heavy duty, high volume, high velocity, aircooled alloy fan is mounted in the top with afull recirculation duct (plenum chamber). Theduct features adjustable vents to control therecirculation pattern of the air. A minimum of40 volume changes per minute of the entireinterior is achieved. The fan is dynamicallybalanced and engineered for long life at hightemperatures. The fan is manufactured byIndustrial Gas Engineering and is very reliable.HEAVY GAUGE STAINLESS STEEL INTERIORThe entire interior is made of stainless steelfor heat and corrosion resistance. Thebottom is 10 gauge while the liners andbaffles are 18 gauge. They are designed toexpand and contract with the heat. Eachpiece of the liner is anchored in one place andthen allowed to expand without restriction.This unique construction differentiates thisoven from the typical construction found inlower temperature cabinet and walk in ovens.HEAVY DUTY CASE CONSTRUCTIONThe oven case is constructed of reinforced 10gauge steel with an integrated floor standwith leveling bolts and mounting holes.SEVEN INCHES OF INSULATION1” of 2300°F (1260°C) ceramic fiber insulationis backed up with 6” of mineral woolsandwiched between the interior andexterior of the oven. The bottom insulationis non-compressible firebrick and calciumsilicate.HORIZONTAL OR VERTICAL DOORSThe DV Series doors are deep plug horizontaldoors. The models that are 36” wide (orwider for custom sizes) feature two doorsthat meet in the middle. The horizontalPage 20doors feature woven fiber tadpoleseals. Pneumatic and electricvertical doors are also available(DR Series). The DR Seriesfeature a front vestibule ofreinforced castable refractoryand ceramic fiber lined doorswhich seal against this rigidvestibule.The DR Series can besupplied with rollers that travelon the vertical doors to matchroller hearths inside the oven.Special hydraulic forklift loadersare also available forloading heavy loads.(See pages 3, 9 & 13).INCOLOYELEMENTS FORELECTRIC OVENSElectric ovens featureelements located inthe recirculatingplenum chamberaway fromthe work zone.These areincoloy sheathedelementswhich are ratedfor 1600°F.ECLIPSETHERMJETBURNER FORGAS OVENSThe gas fired ovensfeature an Eclipse gasburner with a highturn-down ratioof 50:1. The gassystem includes aproportional motorcontrol which adjustsboth gas and air to maintainstoichio-metric firing (proper ratioof gas to air), a gas regulator, lubricatedgas cock, combustion air pressure switch,high/low gas pressure switch, pilot solenoid,pilot regulator, two main shut off solenoids,UV flame safety, air purge system (4 volumechanges) and integrated combustion blower.The system meets NFPA and FM standards.The gas burner fires into the plenumchamber, avoiding flame impingement on theload. These may be specified for natural gasor propane.DIGITAL PID CONTROL AND HIGH LIMITThe standard control is a Honeywell UDC2300 digital control. All fuses, transformers,contactors and controls are located in aAbove is a DR 3648 with a vertical door and rollerhearth system You can see the recirculation muffleinside with adjustable air louvers. These allow youto adjust the pattern of high velocity air inside theoven to achieve maximum temperature uniformity.NEMA 1 panel. Quiet, long life mercurypower contactors are standard on electricovens (SCRs are optional). The thermocouplesare inconel sheathed type K. Thecontrol voltage is transformed to 120 volts. AUDC2300 digital high limit back up controlwith manual reset, back up contactors andseparate thermocouple is included.www.hotfurnace.com

DV & DR OPTIONS● 1400°F (760°C) OPERATION: Interior is 316Stainless Steel.● NEMA 12 PANEL OPTION: Includes a fuseddisconnect switch.● INERT ATMOSPHERE BLANKETING: Onelectric units only.● RAMP/SOAK PROGRAM CONTROLS● TEMPERATURE RECORDERS● SCR POWER CONTROL: For electric units.● MANUAL OR POWERED VENTURI VENT:A manual vent or motor powered venturi can beprovided for venting the oven.● SHELVES AND SPECIAL HEARTHS:Perforated stainless steel shelves, roller hearths,piers, etc.A DV 3648 with doublehorizontal doors is shownto the right. DV ovensthat are 36” or wider(custom sizes) havedouble doors like this.Models that are 24” widehave a single door.DV & DR SPECIFICATIONSMODEL MODEL WORK OUTSIDE DR MAXNUMBER NUMBER DIMENSIONS DIMENSIONS MODEL STANDARD MAX FAN LOAD SHIPHOR DOOR VERT DOOR W H D OW OH OD HEIGHT KW KW HP WEIGHT WEIGHTDV 244 DR 244 24 24 24 70 91 50 148 21.6 48.0 3 400 1600DV 246 DR 246 24 24 36 70 91 62 148 24.0 48.0 3 600 1800DV 248 DR 248 24 24 48 70 91 74 148 32.4 72.0 3 800 2200DV 272 DR 272 24 24 72 70 91 98 148 43.2 96.0 5 1200 2600DV 3636 DR 3636 36 36 36 84 103 62 172 43.2 96.0 7.5 900 2500DV 3648 DR 3648 36 36 48 84 103 74 172 48.0 144.0 7.5 1200 2800DV 3672 DR 3672 36 36 72 84 103 98 172 72.0 144.0 10 1800 3200Dimensions are in inches. Weight is in pounds. Working dimensions have clearances of a minimum of 3” extra in each dimension. Add about 12” to the outside depthfor gas fired ovens. Special sizes and load weights are available. Standard voltages supplied are 480, 240, 208, 380 and 575. Three phase or single phase is available. Gasovens typically have one 500,000 BTU burner which will yield between 250,000 to 300,000 BTU/Hour net (higher BTU ratings are available). Gas fired ovens must beflued to the outside.VB SERIES1300°F Bench Model Electric OvensAPPLICATIONS & FEATURESThe VB Series Bench Mounted ElectricRecirculating Heat Treating Ovens feature airrecirculation for high temperature uniformity,simple, clean, electric operation, a stainlesssteel interior and a precision digital controlsystem. These are ideal for laboratory orsmall production use such as tempering orannealing in heat treating applications. Theyare rated to 1300°F (700°C) with an optionfor 1400°F (760°C) operation. An alloy fan ismounted in the top. The motor is 1/6 hp. Theentire interior is made of stainless steel forheat and corrosion resistance. Theliner is designed to expand andcontract with the heat. The ovencase is constructed of heavy gaugesteel with an integrated benchstand. There is 7” of insulation, agasketed door, digital HoneywellUDC2300 controls and mercurycontactors. Options include stand,SCR power controls, recorders,atmosphere controls, and a NEMA12 control panel.This is a modelVB 124.A NEMA 12panel, roundchart recorderand optionalstand areshown.VB SPECIFICATIONSMODEL WORK DIMENSIONS OUTSIDE DIMENSIONS STANDARD HIGH MAX SHIPNUMBER W H D OW OH OD KW KW LOAD WEIGHT WEIGHTVB 124 12 12 24 52 44 40 4.0 7.2 150 425VB 126 12 12 36 52 44 52 6.0 10.8 225 675Dimensions are in inches. Weight is in pounds. Working dimensions have an extra 1” clearance for all dimensions. 240 or 460 volts are normal. 208 volts will reducepower by 25%. Other voltages are optional. Single phase is normal, although 3 phase is available.800.459.0750Page 21

GLF SERIES2500°F Silicon Carbide Element Box FurnacesAPPLICATIONSThe GLF Series Electric Silicon CarbideElement Floor Standing Box Furnaces featurecontinuous 2500°F (1370°C) operation. Theseare ideally suited for applications where temperaturesbetween 2000°F (1095°C) and 2500°F(1370°C) need to be reached under normaloperating conditions or for very long highheat cycles. The silicon carbide elements alsohave important advantages with certainatmospheres such as carbon rich atmospheres.Model GLF 814 with pneumatic verticaldoor, heat shield for lowering casetemperature and NEMA 12 panel. The taptransformer is not visible but typically sitsbehind the control panel or the furnace.FEATURESSILICON CARBIDE HEATING ELEMENTSSilicon carbide heating elements are mountedover and under the hearth for even heating.All element connections are on the sides.They permit the 2500°F (1370°C) maximumtemperature under continuous operatingconditions. Watt density is between 27 and39 watts per square inch. Elements are ratedfor 3000°F (1650°C).GOOD TEMPERATURE UNIFORMITYTemperature uniformity of +/-25°F (+/-14°C)is normal above 1600°F (870°C) within 2/3 ofthe working dimensions.TIGHT PLUG DOOR WITH A VESTIBULEThe double pivoted hinge allows parallelogramopening of the plug door which keepsthe hot face away from the operator andallows tight sealing of the door. The doorfeatures a 1” deep plug with heat locks. Avestibule around the perimeter of the doorreduces heat loss when the door is opened.This also aids temperature uniformity whileprotecting the elements from physicaldamage. Vertical doors are optional.FLOOR STANDING CASE CONSTRUCTIONThe case is reinforced 10 gauge and 3/16”steel with an integrated floor stand, liftingrings and leveling bolts.1-1/2” THICK SILICON CARBIDE HEARTHThis hearth plate is strong with excellent heattransfer. Hearth is typically 30” from floor.MULTILAYERED INSULATIONWITH CERAMIC FIBER ROOFThere is 4-1/2” of 2800°F (1535°C) insulatingfirebrick backed up with 4” of ceramic fiber.The roof is made from 2600°F (1425°C)ceramic fiber modules. Completely shapedfirebrick sections install easily for replacement.As an option, the entire insulationexcept for the door vestibule can be fibermodules for fast heat up and cool down.Page 22DIGITAL CONTROL AND HIGH LIMITThe standard control is a Honeywell UDC2300 digital control. All fuses, contactors andcontrols are located in a NEMA 1 panel. Thethermocouples are type S. The controlvoltage is transformed to 120 volts. A NEMA13 lighted on/off switch and NEMA 13 doorpower cut off switch are included. A UDC2300 digital high limit back up control withmanual reset, back up contactors andseparate thermocouple is included.SCR POWER CONTROL AND TAPTRANSFORMERThe power control has a 6 position taptransformer with taps that are changed insidethe control panel and a phase angle fired SCR.The SCR adjusts for most voltage changesautomatically as needed, eliminating the needto manually change taps while operating thefurnace. The resistance of silicon carbideelements changes with temperature and soneeds this voltage adjustment. The taps areused occasionally to raise voltage as elementsage.OPTIONS● NEMA 12 PANEL OPTION: Includes a fuseddisconnect switch.● INERT ATMOSPHERE CONTROL: Thesefurnaces can be fitted for use with inert orcombustible atmospheres. Inlet of the atmosphereis through the element connection chamber tomaintain cool element connections. This systemincludes special all aluminum element hardwareinside the sealed boxes. The door features a specialtadpole gasket.● HIGH DENSITY ELEMENTS: These willprovide greater element life than the standardsilicon carbide elements, especially inatmosphere applications. Check with factory forspecific atmosphere limitations with these elements.● RAMP/SOAK PROGRAM CONTROLS● TEMPERATURE RECORDERS● HIGH KW: See specifications.● VENTURI VENT● VERTICAL DOORS: Available with pneumaticor electric operator.www.hotfurnace.com

GF SERIES2800°F Silicon Carbide Element Box FurnacesAPPLICATIONSThe GF Series Electric Silicon CarbideElement Floor Standing Box Furnaces feature2800°F (1535°C) operation. Silicon carbideelements are controlled with a phase anglefired SCR and tap transformer. The doorfeatures a deep plug for minimal heat lossaround the door. Because this door must beopened horizontally the furnace can not beloaded and unloaded easily at high temperatures.These furnaces are excellent for longhigh temperature cycles.They are used mostlyin ceramics but find application in chemicalprocessing and other fields.FEATURESMOST FEATURES ARE THE SAME AS GLFInsulation is a higher grade. Power supply ismore robust but is a similar 6 position taptransformer and phase angle fired SCR. TheGF Series furnaces have higher KW ratingsthan the GLF Series. Most GLF Series options,except for vertical doors, are available on theGF Series.MULTILAYERED INSULATION; CERAMICFIBER ROOF AND DOOR PLUGThere is 4-1/2” of 3000°F (1650°C) insulatingfirebrick backed up with 4” of 2300°F(1260°C) ceramic fiber. The roof and doorare made from 2850°F (1565°C) ceramicfiber modules. The door plug is 2” deep.Model GF 3648 withatmosphere sealed case.SILICON CARBIDEHEATING ELEMENTSSilicon carbide heatingelements are mountedover and under the hearthfor even heating. All elementconnections are onthe sides. Watt density isbetween 30 and 39. Elementsare rated for3000°F (1650°C).The GL9, GL29, GL39 are all bench mountedversions of the GLF Series. Elements run on linevoltage (without a tap transformer) and use spiral typesilicon carbide elements. The popular GL29 is shownbelow.GL, GLF & GF SPECIFICATIONSMODEL WORK DIMENSIONS INSIDE DIMENSIONS OUTSIDE DIMENSIONS GL/GLF GF GLF MAX GF MAX SHIPNUMBER W H D IW IH ID OW OH OD KW KW LOAD LBS LOAD LBS WEIGHTGL 9 11 8 10 13 16 13 42 42 30 10 - 75 - 900GL 29 11 8 20 13 16 23 42 42 40 20 - 150 - 1400GL 39 11 8 30 13 16 33 42 42 50 30 - 225 - 1900GF 9 12 8 10 14 15-1/2 11-1/2 36 62 28 - 10 - 50 1400GF 29 12 8 20 14 15-1/2 21-1/2 36 62 38 - 20 - 100 1800GF 39 12 8 30 14 15-1/2 31-1/2 36 62 48 - 30 - 150 2200GLF 524 GF 524 15 15 24 17 26-1/2 26 70 61 50 30 33 175 125 2000GLF 814 GF 814 18 12 24 21 23-1/2 26 73 58 50 30 34 225 150 2200GLF 824 GF 824 18 18 24 21 29-1/2 26 73 64 50 37 41 225 150 2700GLF 836 GF 836 18 18 36 21 29-1/2 38 73 64 62 47 52 325 225 3400GLF 236 GF 236 24 18 36 27 29-1/2 38 79 64 62 54 60 450 300 4100GLF 244 GF 244 24 24 24 27 35-1/2 26 79 70 50 50 54 300 200 3900GLF 246 GF 246 24 24 36 27 35-1/2 38 79 70 62 65 66 450 300 4900GLF 248 GF 248 24 24 48 27 35-1/2 26 79 70 74 80 86 600 400 5900GLF 3636 GF3636 36 36 36 39 47-1/2 38 91 82 62 95 106 675 450 7400GLF 3648 GF 3648 36 36 48 39 47-1/2 50 91 82 74 114 127 900 600 8600GLF 3672 GF 3672 36 36 72 39 47-1/2 74 91 82 98 150 164 1350 900 10,000All dimensions are in inches. Weight is in pounds. Hearth height is 30” on floor mounted units (all but GL9, GL29, GL39 which are bench mounted furnaces). Hearthdimensions are the same as working width and depth. Typical floor standing control panel is 24” wide by 66” high by 36” deep. Standard voltages supplied are 480, 240,208, 380 and 575. Three phase or single phase is available. Larger sizes are available by special quote. The same KW rating used on the GF furnaces can be obtained inthe GLF line as an option.800.459.0750Page 23

GHH SERIES1700°C Ceramic Fiber Lined Front Loading Box FurnacesAPPLICATIONSThe GHH Series Ultra High TemperatureFront Loading Box Furnacesfeature a unique lightweight ultrahigh temperature ceramic fiber insulationsystem for fast heat up andlow BTU input requirements. TheGHH series achieves 1700°C (3100°F)under continuous operation. Theinsulation system, which is the mostfragile and difficult aspect of this typeof furnace, is uncompromised inquality and construction detail. It isguaranteed for one full year - animportant consideration with thistype of furnace.FEATURESMULTILAYERED FIBER INSULATIONThe furnace is insulated with multi-layeredhigh alumina and alumina-silicate ceramicfiber board. The hot face is prefired highalumina board made by Zircar or Rath. Theinsulation is segmented and supported by aseries of splines, alumina rods and sapphireclips. This is the most critical part of thefurnace design in terms of longevity. Tripleheat locks are designed into the system forextra protection at high temperatures. Avestibule protects the molybdenum disilicideelements and prevents excessive heat losswhen the front door is opened.MOLYBDENUM DISILICIDE ELEMENTSThe elements are Kanthal Super 33 U-shapedmolybdenum disilicide elements. These willwithstand 1800°C (3275°F) in air. Allelectrical connections are at the top, and theelements are suspended from the roof. Theelectrical resistivity of these elementsremains constant over time with little aging.This allows replacement of one elementwithout changing all elements, a distinctadvantage over silicon carbide elements. Lowwatt density is designed into the elements formaximum element life. All aluminum elementconnection hardware is used to preventgalvanic corrosion.DOUBLE WALL CASE CONSTRUCTIONThe insulation module has its own rigid nonwarpingrefractory board exterior. Thisinsulation module is inserted into a ventilatedsteel casing leaving an air space between theexterior case and the insulation module. Thisallows for cooling of the insulation, importantin long insulation life, and helps maintain acool external case temperature. LargerPage 24Model GHH 36.furnaces feature integral cooling fans toinsure good cold face strength of theinsulation. The GHH 5 and GHH 8 are benchmounted while all others are floor mountedwith an integrated stand.DEEP PLUG DOOR CONSTRUCTIONThe horizontally opening door features adeep plug type seal with triple heat locks.Two pivots, one on the left and one in thecenter of the door, insure very tight sealing. Avestibule around the door opening furtherreduces heat loss and helps protect theelements.GOOD TEMPERATURE UNIFORMITYUniformity of +/-10°C (+/-18°F) is normalabove 1200°C (2200°F) within 2/3 of theworking dimensions.ALUMINA HEARTHThe hearth is a flat alumina plate (or series ofplates) supported by a series of insulatingalumina posts which transfer the weight ofthe hearth all the way to the bottom of thecold face of the bottom insulation.FAST HEAT UP AND COOL DOWNThe all fiber insulation and Kanthal Super 33elements provide extremely fast heating andcooling response.PID DIGITAL CONTROL, HIGH LIMITCONTROL AND SCR POWER CONTROLThe standard control used is a HoneywellUDC2300 digital PID tuning control. Amatched transformer and phase angle firedSCR controls power to the elements. Thethermocouples are type B. Included is aUDC2300 digital high limit back up controlwith manual reset, back up contactors andseparate type B thermocouple.OPTIONS● NEMA 12 PANEL OPTION: Includes a fuseddisconnect switch.● ATMOSPHERE CONTROL: The GHHfurnaces can be fitted for use with inertatmospheres. This is accomplished by having asecondary atmosphere casing that contains theinsulation module. This casing has its own gasketeddoor. Inlet of the atmosphere is through theelement connection chamber to maintain coolelement connections. A completely pipedflowmeter and regulator with ball valve, pressuregauge and pressure relief valve is included.Maximum furnace use temperature is limited to1600°C (2910°F) in nitrogen, argon or helium.Combustible atmospheres are not allowed.● RAMP/SOAK PROGRAM CONTROLS● TEMPERATURE RECORDERS● STANDS FOR BENCH MOUNTED UNITSwww.hotfurnace.com

GHH SPECIFICATIONSWORK INSIDE CHAMBER OUTSIDE ELEMENT MAXMODEL DIMENSIONS DIMENSIONS DIMENSIONS (NO) & LOAD SHIPNUMBER W H D IW IH ID OW OH OD SIZE KW WEIGHT WEIGHTGHH 5* 5 5 5-1/2 7-1/2 6-1/4 6-1/2 18 28 18 (6) 3/6 3.5 10 350GHH 8* 8 8 10 13 9 12 26 36 30 (10) 3/6 4.5 30 650GHH 12 12 12 14 16 14 16 36 51 60 (8) 6/12 8.0 60 1100GHH 14 14 10 20 18 11-1/4 23 38 48 66 (12) 6/12 12.7 100 1400GHH 24 24 20 23 28 22 26 47 72 46 (18) 6/12 40.0 200 2100GHH 36 30 30 46 35 33 48 51 86 66 (21) 9/18 80.0 500 2900*Bench models. Weight is in pounds. All dimensions are in inches except size of elements which are in millimeters (i.e. 3/6 means 3mm for main body of element and6mm for terminal end). Outside dimensions shown do not include control panels. On bench models height to hearth is 10” from bench. Other models are 30” fromfloor to hearth. Control panel for bench models is 17” wide by 48” high by 30” long. Control panel for floor standing models is 17” wide by 60” high by 36” long.Standard voltages supplied are 480, 240, 208, 380 and 575. Three phase or single phase is available except for GHH5 and GHH8. Load weight must be evenlydistributed.GHE SERIES1700°C Ceramic Fiber Lined Elevator FurnacesAPPLICATIONSThe GHE Series Ultra High TemperatureBottom Loading Elevator Furnaces feature lightweightceramic fiber insulation system for fastheat up and low BTU input requirements. Theload is placed on a motorized elevator thatmoves up into the bottom of the fixed furnace.Elements on all four sides provide superior uniformity.The GHE series achieves 1700°C(3100°F) under continuous operation. The insulationsystem, which is the most fragile and difficultaspect of this type of furnace, is uncompromisedin quality and detail. It is guaranteed forone full year - an important consideration withthis type of furnace. It is hard to damage theinsulation or elements when loading one ofthese furnaces.FEATURESHIGH ALUMINA FIBER INSULATIONThe insulation is made of high alumina fibermade by Zircar or Rath. The hotface isconstructed with an edge mounted butcherblockmethod with spline support rods.DOUBLE WALL CASE CONSTRUCTIONThe insulation module has its own rigidrefractory board exterior. This module is insertedinto a ventilated steelcasing leaving an air spacebetween the exterior caseand itself. This allows forcooling of the insulation,important in long insulationlife, and helps maintain acool external case .ELEMENTSElements are Kanthal Super33 U-shaped molybdenumdisilicide elements.DEEP PLUG BOTTOMCONSTRUCTIONThe bottom features adeep plug type seal withtriple heat locks. A vestibulearound the bottomopening reduces heat lossand helps protect theelements. The floor is1785°C (3250°F) firebrick.ELECTRIC ELEVATORThe bottom rises into thefurnace by means of an electric gear motor.A foot switch is optional.CONTROL ARE THE SAME AS GHH SERIESTap transformer, SCR and UDC2300.Model GHE 24. Taptransformer is visiblebehind the NEMA 12control panel.TEMPERATURE UNIFORMITYUniformity of +/-10°C (+/-18°F) is normalabove 1200°C (2200°F) within 2/3 of thework dimensions. The fact that the elementsare on all four sides makes the gradientuniformity particularly good.GHE SPECIFICATIONSWORK INSIDE CHAMBER OUTSIDE ELEMENT MAXMODEL DIMENSIONS DIMENSIONS DIMENSIONS (NO) & LOAD SHIPNUMBER W H D IW IH ID OW OH OD SIZE KW WEIGHT WEIGHTGHE 12 12 12 12 16 14 16 33 90 39 (8) 6/12 8 60 1500GHE 15 15 15 15 19 17 19 36 96 42 (12) 6/12 16 100 2000GHE 24 24 24 24 28 26 28 45 114 51 (16) 6/12 40 200 3000GHE 36 36 36 36 40 38 40 57 138 63 (24) 6/12 80 500 5000Weight is in pounds. All dimensions are in inches. Outside dimensions shown do not include control panels. Hearth height is 42” from floor. Control panel is 17” wideby 60” high by 36” long. 6/12 means 6 mm for main body of element and 12 mm for terminal end. Standard voltages supplied are 480, 240, 208, 380 and 575. Threephase or single phase is available. Load weight must be evenly distributed.800.459.0750Page 25

FC SERIESCeramic Fiber Lined Car Bottom FurnacesAPPLICATIONSThe FC Series Car Bottom Furnaces featuretight pneumatic car seals, electric car drivesand a wide range of custom options includingvertical doors, program controls and customhearths. The car bottom makes thesefurnaces extremely easy to load. They achievehigh precision by featuring highly accuratecontrols, mercury contactors or SCR powercontrols, fans, multi-zoning, and very evenspacing of elements for uniformity. Theyreach 2200°F (1200°C) with iron-aluminumchromeelements. Insulation is all ceramicfiber except for hearth and hearth support.These furnaces can be designed for extremelyheavy loads. Gas fired units are also available.This is a modelFC 8820 withsix fans and aload capacity of40,000pounds.FEATURESEVEN ELEMENT PLACEMENT AND ZONECONTROL FOR HIGH UNIFORMITYThe elements are normally divided into topand bottom zones. The control output isrouted through two percentage timers whichallow adjustment of the total time on to eachzone. If SCR power controls are used thesecan be zoned using digital biasing switches orcan have separate PID loops to control them.Coiled alloy elements are evenly spaced alongthe sides, back and door creating an even wallof radiation. The standard furnace is uniformto within +/-25°F (+/-14°C) or better at1500°F (815°C). Optional fan systems andmultiple control zones are available foruniformity of up to +/-10°F (+/-5.5°C).CERAMIC ELEMENT HOLDERSThe elements are supported in proprietaryceramic element holders. These provideperfect support for the coiled elements aswell as excellent radiating characteristics. Thesmooth surface prevents premature failure ofthe element as it expands and contracts. Theholders are kept in place on the insulationwalls with specially designed ceramic clampsand screws which fasten to a stainless steelmesh screen, which is an integral componentof the insulation module.LOW DENSITY FIBER INSULATIONThe furnace, except for the car, is insulatedwith low density, highly insulating ceramicfiber and mineral wool for fast heat up andcool down. The total insulation thickness istypically 8”. 2600°F (1425°C) fiber is usedfor 2200°F (1200°C) furnaces and 2300°F(1260°C) fiber is used for 2000°F (1095°C)or below.HEAVY DUTY CASEThe case is made of strongly reinforced 3/16”thick steel with an integrated base fabricatedof heavy square tube and angle sections. Verylarge models can be made in several sections.CAR BOTTOM FEATURES ELECTRIC DRIVEThe car bottom is made with heavy platesteel and structural members.The perimeterof the car is cast with a reinforced andanchored castable suitable for heat shock.Inside this perimeter, the car is insulated withinsulating firebrick and surfaced with 2” castslabs of castable for heavy duty wear resistance.Alternately, cast piers for easy forkliftloading can be provided. Low mass cars arealso available depending on the load configurationand weight. The car is driven in andout of the furnace with a car mounted ACbrake motor drive. A cable reel feeds powerto the car. Railroad type rails are providedwith mounting plates. Rails can be mounted introughs in the floor or on top of the floor.Detailed installation drawings are provided.TIGHT PNEUMATIC CAR SEALSThe car seals feature a wide pad of ceramicfiber blanket. These are pushed by pneumaticcylinders against the castable edge of the car.They retract when the car is about to bemoved. Limit switches prevent car movementunless the seals are fully retracted. This sealis extremely tight and features low wearbecause there is no rubbing on the seal.DOOR AND SEALThe door seal is also a wide pad of ceramicfiber, which seals against a rigid ceramic fiberboard attached to the case front. Carmounted doors and double pivotedhorizontal doors are available.DIGITAL PID CONTROL AND HIGH LIMITStandard controls include a Honeywell UDC2300 digital control and high limit back up.Mercury contactors are standard; SCRs optional.OPTIONS● RAMP/SOAK PROGRAM CONTROLS● TEMPERATURE RECORDERS● SCR POWER CONTROLS● MULTI-ZONE UMC800 CONTROL● HIGH TEMPERATURE FANS● VENTURI COOLING & VENT SYSTEMS● GAS FIRED UNITS: (See XLG on page 18).Page 26www.hotfurnace.com

FC SPECIFICATIONSACTUAL APPROX TYPICAL TYPICAL MAXMODEL WORK DIMENSIONS INSIDE DIMENSIONS OUTSIDE DIMENSIONS STAND HIGH LOAD SHIPNUMBER W H D IW IH ID OW OH OD KW KW LBS WEIGHTFC 444 48 48 48 54 60 55 90 108 82 76 114 2,400 10,500FC 448 48 48 96 54 60 103 90 108 130 120 180 4,800 15,000FC 556 60 60 72 66 72 79 102 120 106 125 188 4,500 15,000FC 5512 60 60 144 66 72 151 102 120 178 205 307 9,000 21,000FC 5524 60 60 288 66 72 295 102 120 322 364 546 18,000 35,000FC 666 72 72 72 78 84 79 114 132 106 155 232 5,400 17,000FC 6612 72 72 144 78 84 151 114 132 178 248 372 10,800 24,000FC 6624 72 72 288 78 84 295 114 132 322 435 652 21,600 40,000FC 8812 96 96 144 102 108 151 138 156 178 342 513 14,400 31,000FC 8824 96 96 288 102 108 295 138 156 322 584 876 28,800 50,000Dimensions are in inches. Weight is in pounds. Add another 30” to width for control panel. Hearth height is 28”. OH dimension is with horizontal door. Add IHdimension to OH for approximate height with vertical door. Special load weights for extremely heavy loads can be designed. Special sizes are common. Standard voltagessupplied are 480, 240, 208, 380 and 575. Three phase or single phase is available. Gas furnaces’ BTUs are designed per application (see the XLG specifications on page19 for approximate guidelines on BTU ratings of gas furnaces).FS SERIESCeramic Fiber Lined Shuttle - Envelope FurnacesAPPLICATIONSThe FS Series Shuttle - Envelope Kilns areprimarily designed for the firing of ceramic wareor other loads that one wouldn’t want to moveon a car bottom. Each furnace system typicallyincludes two or three fixed stationary bases anda moving furnace that “shuttles” between thetwo bases. The stationary bases provide a stableplatform for loading delicate loads. The base iseasy to load because it can be loaded from allfour sides. Normally the furnace is removedfrom the fired load at a fairly high temperaturefor a fast cool down in the slowest part of thecooling curve. This greatly adds to the efficiencyof the whole system. We have made these foruse with atmosphere retorts which are quick tocool down and easy to load. Typical temperaturesreached are 2200°F (1200°C).This is a custom designedFS 234 which was designedto process very delicatesatellite battery materials.FEATURESMOST FEATURES ARE SIMILAR TO THE FCSERIES CAR BOTTOM FURNACESKILN MOVERElectric or manual kiln movers are offered.SHUTTLE CASE DESIGNOne to three bases are included along withtracks above or below floor level.HORIZONTAL OR VERTICAL DOORSThere are one or two doors which can bevertical or horizontal.FS SPECIFICATIONSWORKMODEL WORK DIMENSIONS INSIDE DIMENSIONS OUTSIDE DIMENSIONS TOTAL CUBIC TYPICAL LOAD SHIPNUMBER W H D W H D W H D LENGTH FEET KW WEIGHT WEIGHTFS 224 30 48 48 38 54 56 88 92 80 196 40 86 750 7,400FS 246 30 48 72 38 54 80 88 92 104 244 60 113 1,125 9,300FS 2412 30 48 144 38 54 152 88 92 176 388 120 192 2,250 15,300FS 2424 30 48 288 38 54 296 88 92 320 676 240 351 4,500 27,200FS 4512 48 60 144 56 66 152 106 104 176 388 240 267 3,600 19,600FS 4524 48 60 288 56 66 296 106 104 320 676 480 478 7,200 34,800Dimensions are in inches. Weight is in pounds. Custom sizes are available. Total length is for one kiln with two bases. Gas fired units are available. Inside dimensionsincrease for the same load size. Standard voltages supplied are 480, 240, 208, 380 and 575. Three phase or single phase is available. Hearth height is 24” from the floor.800.459.0750Page 27

WB & WQ SERIESBell-Lift Annealing & Preheat Ovens for Glass, Quartz and Steel (Up to 2200°F)APPLICATIONSThe WB Series Glass Annealing Oven isdesigned for the purpose of annealing borosilicateglass although it may be used for otherapplications such as metal annealing and weldpre-heating. The heated oven portion is acounterbalanced rectangular "bell" that liftsentirely out of the way when loading theoven. The oven features proprietary ceramicelement holders for easy low cost replacementof elements and maximum element life,low density ceramic fiber and mineral woolinsulation and a digital programmable temperaturecontrol for automated cycling.Maximum temperature is 1500°F (815°C).The WQ Series are similar but rated tohigher temperatures 2200°F (1200°C) forannealing quartz, firing ceramics and otherhigh temperature applications.FEATURES FOR BOTHCERAMIC ELEMENT HOLDERSThe elements are supported in proprietaryceramic element holders located on all foursides of the oven. Element replacement iseasy; elements just lift out of the holderswithout affecting the fiber hot face.COUNTERBALANCED BELL LIFT CASEThe oven is a rectangular bell that liftsvertically from the rigid base. The bell issupported by two heavy channels from theback, leaving the entire hearth area exposedwithout obstruction for easy loading. Theoven section is counterbalanced in the rear.Roller bearings insure smooth operation. Ahand crank is included as standard for easyraising and lowering. An optional power liftingdrive system is available as an option.Theentire case is designed to fit through a 32”wide doorway.CERAMIC FIBER HEARTHCeramic fiber blanket providesa soft surface for glassor quartz annealing. Brickhearth is optional forheavier loads.EASY TO VIEW SLIDE-OUT CONTROL PANELAll controls are located in aNEMA 1 panel mountedunder the furnace to savefloor space. This slides outon tracks for maintenance.PROGRAM CONTROLHoneywell UDC3300 features6 ramps and 6 soaks.FEATURES FOR WB SERIESEFFICIENT MULTILAYERED INSULATION1-1/2” of ceramic fiber board is backed up by2” of mineral wool board on the sides and 4”on top. This extremely efficient insulation willheat up and cool down quickly. The fiber boardsections are available completely shaped foreasy replacement without cementing.NICHROME ELEMENTSTYPE K SHEATHED THERMOCOUPLESFEATURES FOR WQ SERIESEFFICIENT MULTILAYERED INSULATION1-1/2” of ceramic fiber board is backed up by2” of 2300°F (1260°C) ceramic fiber blanketand 1” of mineral wool board. The fiber boardsections are available completely shaped foreasy replacement without cementing.IRON-ALUMINUM-CHROME ELEMENTSTYPE S SHEATHED THERMOCOUPLESSCR POWER CONTROLModel WB 10OPTIONS● OVERTEMPERATURE SYSTEM● BRICK BOTTOM: The bottom can be madefrom 4-1/2" thick firebrick for heavier hearthloading.● POWER LIFT: A gear motor lifts the furnace upand down. Limit switches are included.● MERCURY POWER CONTACTORS ORSCR POWER CONTROL FOR WB SERIES● ATMOSPHERE SEALED CASE: See gasket onthe bottom of the WB2 case shown in photo below.WB & WQ SPECIFICATIONSMODEL INSIDE DIMENSIONS OUTSIDE DIMENSIONS LOAD WEIGHT WITH MAX SHIPNUMBER IL IH IW OL OH OW KW BRICK BOTTOM TEMP WEIGHTWB 2 24 24 19 37-1/2 92-3/4 35-1/4 3.5 300 1500°F 1100WB 5 60 24 19 73-1/2 92-3/4 35-1/4 7.0 750 1500°F 1800WB 6 72 24 19 85-1/2 92-3/4 35-1/4 8.0 900 1500°F 2000WB 8 96 24 19 109-1/2 92-3/4 35-1/4 10.5 1200 1500°F 2500WB 10 120 24 19 133-1/2 92-3/4 35-1/4 11.0 1500 1500°F 2900WQ 2 20 24 17 37-1/2 92-3/4 35-1/4 8.0 300 2200°F 1100WQ 5 56 24 17 73-1/2 92-3/4 35-1/4 17.0 750 2200°F 1800WQ 6 68 24 17 85-1/2 92-3/4 35-1/4 18.0 900 2200°F 2000WQ 8 92 24 17 109-1/2 92-3/4 35-1/4 22.0 1200 2200°F 2500WQ 10 116 24 17 133-1/2 92-3/4 35-1/4 28.0 1500 2200°F 2900Dimensions are in inches. Weight is in pounds. Hearth height is 31”. Standard voltages supplied are 480, 240, 208, 380 and 575. Three phase or single phase is available.Page 28www.hotfurnace.com

QT SERIESAgitated and Heated Heavy-Duty Quench TanksAPPLICATIONSThe QT Series Quench Tanks are used for theuniform quenching of hot steels. They may beused with water, light weight polymer or oil.They are not designed for use with brine.Water or polymer must have rust inhibitors(or tank must be stainless steel). They featureproper agitation which insures uniformquench temperatures and disperses thebubbles of vaporized quenchant that form onthe surface of the hot parts being quenched.These bubbles, if not dispersed, can causeuneven quenching times which would result ina unevenly and poorly quenched part. Theagitation also prevents localized overheatingwhich, in the case of oil quench media, couldcause a fire. The QT Series Quench Tanks alsofeature integrated controlled heaters andlarge inlet and outlet taps for optional coolingsystems. An optional hinged lid provides ameans to extinguish any potential quench oilfires and to keep quench media clean.FEATURESDOUBLE WELDED CONSTRUCTIONThe tank is made from 3/16” steel (1/4” onModel QT 3648 and larger) and is completelyreinforced. All seams are welded on bothsides. The tank includes lifting provisions. Abase coat of zinc chromate primer is coveredwith heavy duty two-part epoxy paint thatresists mechanical and chemical attack.HIGH WORK CAPACITYWithout optional external cooling thesequench tanks are capable of quenching as manypounds per hour as there are gallons capacity inthe tank. There are 6” extra in height above thenominal fill level to allow for fluid rise whenparts are added.There are 3”above, below and to each sideof the work dimensions toallow for good agitation.STANDARD AGITATORMOTOR IS TEFCThe standard agitator motoris a TEFC motor. This isspecified for water or polymerquench media. Oilquench media requires theoptional explosion proofmotor.CONTROLLED HEATERA removable heater isincluded to heat the quenchmedia to proper quenchingtemperatures. Typically thisis in the 120°F (50°C) to140°F (60°C) range. Thethermostat is integral to theheater.Model QT 2436shown with optionallid held in place byfusible link for fireprotection.COOLING INLET AND OUTLET; DRAINAn NPT fitting (with pipe cap) is welded nearthe bottom to drain and clean the tank. LargeNPT fittings are welded at opposite cornersfor potential attachment of a quench cooler.IMPELLER TYPE AGITATIONAn impeller type agitator insures properagitation of the quench media. The horsepowerand impeller of the agitator aregenerously sized for vigorous agitation.SEPARATE CHAMBER FOR IMPELLERTEMPERATURE GAUGENEMA 4 ELECTRICAL CONNECTION BOXIncludes on/off switch, fuses, contactors forheater, motor control for agitator and controltransformer. Control circuit is 120 volts.OPTIONS● STAINLESS STEEL CONSTRUCTION● NEMA 12 PANEL OPTION: Includes a fuseddisconnect switch.● EXPLOSION PROOF MOTOR: Specified if thequench tank is going to be used with oil.● HINGED SAFETY LID: Includes a fusible linkfor automatic closing in event of fire.● OVERTEMPEPATURE CONTROL: This shutsoff heater. Preset for 175°F (80°C).● QUENCH MEDIA COOLERS: A cooler allowsgreater work load through-put per hour.● ELEVATORS: The quench tanks can be fitted witha pneumatically operated elevator for lowering thework into the tank. The elevator platform can haverollers to accept cast alloy trays directly from a furnace.There is a photograph of this on the front cover.QT SPECIFICATIONSTANKMODEL WORK DIMENSIONS INSIDE DIMENSIONS OUTSIDE DIMENSIONS TOTAL HEATER AGITATOR SHIPNUMBER D H W ID IH IW OD OH OW GALLONS KW HP WEIGHTQT 1224 24 12 12 30 24 28 44 44 31 65 4.5 1/2 400QT 1824 24 18 18 30 30 34 44 50 37 100 7.9 1/2 450QT 2424 24 24 24 30 36 40 44 64 44 150 10.5 3/4 600QT 2436 36 24 24 42 36 41 56 64 44 220 15.0 3/4 750QT 2448 48 24 24 54 36 40 72 64 44 280 18.0 1 1000QT 3648 48 36 36 54 48 56 72 72 61 475 30.0 2 1600QT 3672 72 36 36 78 48 60 96 72 67 730 50.0 3 2600QT 4848 48 48 48 54 60 72 72 84 79 810 50.0 3 2600QT 4872 72 48 48 78 60 72 96 84 79 1170 64.0 5 3300QT 7272 72 72 72 78 84 96 96 108 105 2340 140.0 10 5100Working dimensions have clearances approximately 3” extra in width and depth. Inside tank dimensions include the separate agitation/heating chamber. Outsidedimensions include control panel and agitator motor but does not include the height of the raised lid. Tank is 6” deeper than fluid level to allow for work displacement.Special sizes are available. 240 or 460 volts are normal. 208, 380 and 575 volts are optional. 208 volts reduces KW to 75% of rated power. 3 phase is normal althoughsingle phase is available.800.459.0750 Page 29

FW SERIES2400°F Gas Fired ForgingFurnacesThe FW Series feature a unique vertical doorthat allows the furnace to be used as ageneral purpose box furnace or a slot forgingfurnace. Single or multiple burners.MODEL W H D BTU/HR MAX LOADFW 222 24 24 24 200,000 600FW 224 24 24 48 400,000 1200FW 333 36 36 36 600,000 1350FW 334 36 36 48 700,000 1800FW 336 36 36 72 800,000 2700FW 444 48 48 48 900,000 2400FW 446 48 48 72 1,250,000 3600Dimensions are working dimensions.PT SERIESTop Loading Pit FurnacesThe PT Series are round furnaces typicallyinstalled in pits for processing of longparts that must be kept vertical. They oftenhave powerful bottom mounted fans andrecirculation baffles for high uniformity. Theymay be designed for annealing, neutralhardening, carburizing, carbonitriding or avariety of other applications. Electric or gasradiant tube fired. Sizes, temperature rangeand design are customized for the application.CP SERIESContinuous Batch TemperOvensThe CP Series Continuous Batch ProductionOvens feature automatic batch loading, singleor multiple zones, optional air and/or watercooling. Each station’s load is independentand does not require another tray to move it.The CP ovens are typically used for temperingin post induction hardening operations.Gas or electric.IQV 1224Vertical Integral QuenchFurnaceThe IQV 1224 is a Vertical Loading IntegralQuench Furnace. It features virtually “instanton” capability because of its unique retortdesign. Operation is automated. Workingdimensions are 12” diameter by 24” high.200 pound load. Total KW: 28. 1800°F(980°C) maximum temperature. Useful forcarburizing, carbonitriding and neutralhardening where case finish is critical.Page 30NM SERIESNitrogen/MethanolAtmosphere SystemsThe NM Series Nitrogen/Methanol FlowControl System uses nitrogen and methanol toprovide a highly protective atmosphere forcarburizing, neutral hardening and otherprocesses. Optional ammonia flow systemprovides carbonitriding capability. The methanoldissociates into 67% hydrogen and 33% carbonmonoxide. Along with 40% added nitrogen thisprovides the base atmosphere (very similar toendothermic gas but more uniform and with alower dew point). Natural gas or propane isadded to increase carbon potential. Optionalcompressed air is used to lower carbonpotential when necessary and for carbon burnout. Nitrogen is also used as an emergencypurge. The percentage of methanol vs nitrogencan be varied to adjust for varying conditions.The combustible portion of the atmosphere isintroduced above 1400°F (760°C). Flow ratesand ranges are engineered for specific systems.The methanol and nitrogen are injected intothe furnace through an alloy sparger which islocated inside the furnace. This spargeratomizes and dissociates the methanol before itactually enters the furnace interior.Atmosphereis controlled with an oxygen probe and digitalcarbon control.CB SERIESCarburizing & NeutralHardening FurnacesThe CB Series is designed for carburizing,carbonitriding and neutral hardening. Thesefurnaces feature endothermic or nitrogen/methanol atmospheres, automatic carboncontrol, fan, and heavy gauge low voltage rodoverbend elements or gas fired radiant tubes.The maximum temperature is 2000°F (1095°C).MODEL W H D KW MAX LOADCBS 124 12 12 24 12.5 150CB 222 24 24 24 51 400CB 223 24 24 36 63 600CB 224 24 24 48 74 800CB 324 36 24 48 89 1200CB 326 36 24 72 115 1800Dimensions are working dimensions.www.hotfurnace.com

JDR SERIESTop Loading Controlled Atmosphere Retort FurnaceThe JDR Series is an Electric Top LoadingAtmosphere Retort Furnace with someunique characteristics. It was developed forsintering for rapid prototyping but has manyother applications where a clean inertatmosphere is required at a relatively lowcost. It also features fast cool down withoutany special fans. The three zone controlsystem and bottom elements make thefurnace highly uniform. There is an alloyround atmosphere tight retort designed forinert atmospheres. The round retort withwith no water cooling resists many of thestresses that can shorten retort life. The typeof alloy used is dependent on the temperatureand application (Inconel 601 is usedfor 2200°F/ 1200°C). Inlet and outlet aremounted through the bottom. There is a 3”deep trough for a sand seal made of zirconiasand. The loading hoist and fixture shown areoptions.CERAMIC KILNSTop Loading Kilns forCeramicsOur sister company, L&L Kiln Mfg., Inc. has anextensive line of inexpensive top loading andBell-Lift kilns for the institutional, professionaland industrial ceramic field.These have alsobeen adapted to many other industrial uses.Sizes range from2.6 cubic feet to34.5 cubic feet.Ask for theseparate kilncatalog or visitwww.hotkilns.com.QTS 124Small Agitated QuenchTankThe QTS 124 Quench Tank is used for theuniform quenching of hot steels. The QTS 124features proper agitation which insuresuniform quenching and disperses the bubblesof vaporized quenchant that form on thesurface of the hot parts being quenched. Anoptional hinged lid provides a means toextinguish any potential quench oil fires and tokeep quench media clean. Casters are includedto make the tank easily portable. 25 Gallons.Work dimensions of 12” Wide x 12” High x24” Long. Voltage:120/1/60. 1/2 hp. 7.6 Amps.AQ TABLESAir Quench TablesAQ Series Air Quench Tables are made forrapid air quenching of air hardening toolsteel. They feature a cooling fan underneaththe work surface. Typically they are integratedinto the furnace design for quickunloading and often have rollers to minimizefriction. These are designed to suit.PFT 412Small Atmosphere PusherFurnaceThe Model PFT 412 Straight Through ManualPusher Furnace is designed for protectiveatmosphere brazing, soldering, annealing andother operations that require heating to1400°F (760°C) or optional 2000°F (1095°C)and quick subsequent cool down underatmosphere. The furnace is electricallyheated and features a water jacketed cooldown section. The standard furnace can beused with air, nitrogen, argon, premixedforming gas (4% hydrogen, balance nitrogenor argon) or dissociated ammonia for scalefree results.800.459.0750Page 31

CUSTOMERS OF L&L SPECIAL FURNACE CO, INC.Some of the Special Customers L&L Special Furnace Co, Inc. is Proud to ServeAEROSPACEAllied Bendix AerospaceAllied Signal AerospaceAmerican AirlinesBell AerospaceBoeing Commercial AirplanesBoeing Support Services(Helicopters)Continental AirlineCurtiss Wright Flight SystemsFederal Aviation AdministrationGE Aircraft Engine DivisionGeneral Dynamics Inc/Space Sys.Grimes AerospaceHoneywell-Avionics DivisionHoneywell-Sperry Defense Sys.Lockheed Martin Aircraft CenterLucas Aerospace Cargo SystemsNational AirmotiveNorthrop Grumman Corp.Northwest AirlinesPhilippine AirlinesPratt & WhitneyPropulsion TechnologySikorsky AircraftStanley AviationTWAUS AirAUTOMOTIVEAllison Gas TurbineBuick Oldsmobile Cadillac GroupCaterpillarCentral Manufacturing Co(Toyoto Tsusho Parent Company)ChryslerDelphi Engineering & ContractDetroit Diesel AllisonEaton CorporationFederal MogulFisher BodyFord Motor Co/Dearborn EngineGeneral Motors Truck GroupITT AutomotiveJohn DeerSteel Parts Corp.CERAMICSBenchmark Structural CeramicsCarborundum Structural CeramicsCarpenter Advanced CeramicsCentury Engineered MaterialsCeramics Process SystemsCeramics to Metal SealsCeres CorporationCoors CeramicsCridge, Inc.Engineered CeramicsFranklin MintSmart CeramicsSuperior Technical CeramicsVesuvius McDanelVesuvius ResearchCOATINGSDiamant Boart AmericaHowmet/Thermatech CoatingsRichter PrecisionUnion Carbide/Coatings Service Corp.Wendt DunningtonCOMMERCIAL HEATTREATINGAtlantic Quality Heat TreatAutomated Heat TreatingCentury Specialties Inc.Marada IndustriesMetal Treating Inc.Purdy CorporationSimmons Heat TreatingSolar AtmospheresVac HydeCONSUMER PRODUCTSBriggs & StrattonMaytag CompanyMilwaukee Electric Tool Corp.Thomson Consumer ElectronicsTimex CorporationDEFENSEAberdeen Proving GroundsAmerican Ordnance (GeneralDynamics)AVCO Textron Defense SystemsCanadian Forces Fleet SchoolChamberlain Mfg CorpDFAS/Columbus CenterLetterkenny Army DepotMilan Army Ammunition PlantNorfolk Naval ShipyardRaytheonRed River Army DepotSperry Defense System DivisionUS Army Dugway Proving GroundsVandenburg Air Force BaseELECTRICAL &ELECTRONICAllen-Bradley CoAmerican ElectricalTerminal/American EyeletCarborundum Co/ElectronicMaterials GroupDeutsch Relays Inc.Magnetics (Spang)Pass & Seymour LegrandTelemecaniqueThin Film TechnologyENVIRONMENTALWeston, Roy F. Inc.FASTENERSMicroAssembly Systems, Inc.Southco, Inc.SPS TechnologyFOUNDRY & FORGINGSAir Foil Forging TextronAlloy Steel Castings Co.BarroncastBescastCasting Coatings Corp.Casting Technology CompanyElyria FoundryInvestment Castings/Sealed PowerMartin FoundryPenn. Precision Cast PartsQuality Investment CastingsSeneca FoundrySpecialty Ring ProductsHEAVY INDUSTRYDeLaval Turbine, Division DemagDresser/Worthington PumpEmerson Electric CompanyFlowserve Corp.MEDICAL & DENTALAmerican OrthodonticsCam Implants B.V.Codman and ShurtleffJohnson and Johnson OrthopedicsMerck & Company Inc.Merit Medical Systems, IncOsteonicsSurgical Design CorpSynthesThree M Dental ProductsNUCLEARDupont - Savannah River PlantKnolls Atomic Power Lab (GE)Lockheed Martin Energy SystemsMason & Hanger /Pantex PlantSandia National LaboratoriesTennessee Valley AuthorityWestinghouse -Nuclear FuelOPTICS, QUARTZ &GLASSSola OpticalAmerican Scientific Glass, Inc.Consolidated FiberglassCorning GlassEG&G Electro Optics Div.Elcan Optical TechnologiesH.J.F. Optical LensesHughes Danbury Optical SystemsKollmorgen Corp/Electro-OpticalEastman KodakLibby Owens /LOF Glass Inc.Osram Sylvania Products Inc.Owens Corning FiberglassPPG Industries/AZDELSchott Fiber OpticsUnimin Quartz OperationsPRECIOUS METALSEnglehardHeraeus EngelhardSpecial Metals Corp.Johnson MatheyRESEARCH & SPACEArmy Materials Technical LabConcurrent Technologies Corp.Cornell UniversityFERMILABGeorgia Institute of Tech.Mass Institute of Tech.NASA Goddard Space Flight Ctr.NASA Langley Research CenterNational Inst of Standards & Tech.Naval Air DevelopmentSandia National LaboratoriesTexas A&M UniversitySPECIALTY HEATTREATINGBank of FranceGov of Zimbabwe/Dept ofMetalurgySTEEL & ALUMINUMAlcoaAlcoa PermatechCrucible Specialty MetalsKennametalLone Star Steel CompanyManitoba Rolling MillsNational Steel CorporationNiagara Specialty MetalsNucor SteelReynolds Metals Co.Timken ResearchUS SteelUSX CorporationSUPERCONDUCTORSAmerican SuperconductorTOOLINGAccurate Tool Co., Inc.Elizabeth Carbide Die Co.Unipunch Inc.REFRACTORIESBaker RefractoriesCoastal RefractoriesGunning RefractoriesHarbison Walker RefractoriesJohns ManvilleKeystone CarbonNational Electric CarbonNorth American RefractoriesNorton CompanyOhio Carbon CompanyRobert J Jenkins & Co.Zircar ProductsUTILITYGPU Generation, Inc.GE Power Systems CompositsWIRE & CABLECamden Wire and CableCanada Wire & CableTitanium Wire Co.Wire Works Inc.L&L SPECIAL FURNACE CO, INC. • 20 KENT ROAD • P.O. BOX 2129 • ASTON, PA 19014-1494PHONE: 800.459.0750 or 610.459.9216 • FAX: 610.459.3689 • WEB: hotfurnace.com EMAIL: sales@hotfurnace.comCopyright 2003. Specifications subject to change without notice.Bulletin: LS-1-03