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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
Page 1 and 2: FURNACES • OVENS • KILNS • QU
Page 3 and 4: OPTIONSA Wide Range of Options Cust
Page 5 and 6: GS 17142350°F Laboratory, Glass &
Page 7 and 8: XLE SERIESFirebrick Lined 2350°F E
Page 9 and 10: XLE OPTIONS● VERTICAL DOORS: Pneu
Page 11 and 12: QDS SERIESSmall Premium Dual Chambe
Page 13 and 14: FB SPECIFICATIONSMODEL WORK DIMENSI
Page 15 and 16: XLC SPECIFICATIONSINSIDEOUTSIDEMODE
Page 17: TB & TBU SERIESCeramic Fiber Lined
Page 21 and 22: DV & DR OPTIONS● 1400°F (760°C)
Page 23 and 24: GF SERIES2800°F Silicon Carbide El
Page 25 and 26: GHH SPECIFICATIONSWORK INSIDE CHAMB
Page 27 and 28: FC SPECIFICATIONSACTUAL APPROX TYPI
Page 29 and 30: QT SERIESAgitated and Heated Heavy-
Page 31 and 32: JDR SERIESTop Loading Controlled At

ovens • kilns • quench tanks furnaces • ovens • kilns • quench tanks

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