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

More documents

Recommendations

Info

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
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 and 18: TB & TBU SERIESCeramic Fiber Lined
Page 19 and 20: XLG OPTIONS● BLOWER FILTERS● RA
Page 21 and 22: DV & DR OPTIONS● 1400°F (760°C)
Page 23: GF SERIES2800°F Silicon Carbide El
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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?