High Temperature Walk-In Ovens
High Temperature Walk-In Ovens
For annealing, sintering, precipitation hardening, burn-off or any other high temperature processing of large or numerous parts. Constructed with an isolated inner oven to eliminate heat transfer and leakage at seams commonly found in standard panel construction. Designed and constructed for long, hard, continuous use with the temperature uniformity required for consistent results at elevated temperatures.
High Temperature Walk-In Ovens Model Specifications:
CAUTION: Ovens processing combustible material are required by National Fire Protection Association 86 Standard for Ovens and Furnaces (NFPA 86) to have a fire suppression system. If flammable solvents or vapors are present in an oven, OSHA requires conformance with NFPA 86 Class A Oven requirements. A powered forced exhauster and other non-standard safety equipment must be added. See Class A Oven Equipment for Solvent Processing resource page, reference our FAQs or contact us us for more information.
|Model||Workspace||Outside Dimensions*(WxDxH)||Max Temp||Blower||Heat Input||Insulation Thickness||Operating Characteristics†||Approx Shipping Weight|
|Dimensions(WxDxH)||VolumeCu Ft||CFM||HP||ElectricKW||GasBTU/HR||Control Accuracy||Temperature Uniformity||Rise Time (Electric)||Rise Time (Gas)|
|B1-900||48" x 48" x 72"||96||75" x 94" x 92"||900°F||4,200||3||60||400,000||9"||± 0.3%||± 10°F||60||45||8,300 lbs|
|B1-1050||48" x 48" x 72"||96||79" x 104" x 97"||1,050°F||6,400||5||80||550,000||10"||± 0.3%||± 12°F||70||45||9,280 lbs|
|B1-1200||48" x 48" x 72"||96||87" x 114" x 103"||1,200°F||10,000||7 ½||120||880,000||12"||± 0.3%||± 15°F||80||40||15,485 lbs|
|B2-900||54" x 72" x 72"||162||81" x 118" x 92"||900°F||5,000||5||80||600,000||9"||± 0.3%||± 10°F||80||50||9,220 lbs|
|B2-1050||54" x 72" x 72"||162||87" x 130" x 98"||1,050°F||7,800||5||100||880,000||10"||± 0.3%||± 12°F||80||50||10,625 lbs|
|B3-900||60" x 96" x 72"||240||91" x 152" x 95"||900°F||7,800||5||100||700,000||9"||± 0.3%||± 10°F||80||45||10,625 lbs|
|B3-1050||60" x 96" x 72"||240||97" x 158" x 98"||1,050°F||10,000||7 ½||120||880,000||10"||± 0.3%||± 12°F||90||50||12,405 lbs|
|B4-900||72" x 120" x 72"||360||109" x 178" x 96"||900°F||12,500||10||120||880,000||9"||± 0.3%||± 10°F||90||50||12,955 lbs|
|B1H-900||48" x 48" x 72"||96||75" x 108" x 88"||900°F||5,000||5||60||400,000||9"||± 0.3%||± 10°F||60||45||8,340 lbs|
|B1H-1050||48" x 48" x 72"||96||81" x 110" x 91"||1,050°F||7,800||5||80||550,000||10"||± 0.3%||± 12°F||60||45||9,285 lbs|
|B1H-1200||48" x 48" x 72"||96||95" x 114" x 94"||1,200°F||12,500||10||120||880,000||12"||± 0.3%||± 15°F||70||40||15,480 lbs|
|B2H-900||54" x 72" x 72"||162||85" x 132" x 88"||900°F||7,800||5||80||600,000||9"||± 0.3%||± 10°F||80||50||9,275 lbs|
|B2H-1050||54" x 72" x 72"||162||91" x 134" x 91"||1,050°F||10,000||7 ½||100||880,000||10"||± 0.3%||± 12°F||80||50||10,630 lbs|
|B3H-900||60" x 96" x 72"||240||93" x 156" x 88"||900°F||10,000||7 ½||100||700,000||9"||± 0.3%||± 10°F||80||45||10,615 lbs|
|B3H-1050||60" x 96" x 72"||240||101" x 158" x 91"||1,050°F||12,500||10||120||880,000||10"||± 0.3%||± 12°F||90||50||12,385 lbs|
|B4H-900||72" x 120" x 72"||360||119" x 180" x 88"||900°F||17,500||15||120||880,000||9"||± 0.3%||± 10°F||90||50||12,970 lbs|
* Outside Dimensions
- Control panel overhang 9″ right side.
- Blower motor overhang on rear:
- 19″ on 3 and 5 HP motors,
- 26″ on 7-1/2 and 10 HP motors, 28″ on 15 HP
- Gas Models: Burner overhang 15″ right side.
† Operating Characteristics
- Accuracy as percent of controller span.
- Uniformity at 100°F below maximum temperature.
- Rise Time in minutes to 100°F below maximum temperature.
- Tests run with empty oven and minimum exhaust.
- Performance will vary with load and application.
- See Control & Instrumentation Summary for additional details.
Specifications for High Temperature Walk-In Ovens
|MAXIMUM OPERATING TEMP||900°F|
|AIR FLOW||Bottom to Top, Forced Convection, Side to Side|
|CONTROL ACCURACY||± 0.3%|
|OVEN UNIFORMITY||± 10°F|
|RISE TIME - ELECTRIC||60 mins|
|RISE TIME - GAS||45mins|
|WORKS SPACE DIMENSIONS (WxDxH)||48" x 48" x 72"|
|NUMBER OF SHELVES MAX||None|
|MAX LOAD CAPACITY||Not Available|
|LOADING METHOD||Cart or Truck, Floor|
|APPROXIMATE SHIP WEIGHT||8300 lbs|
|OUTSIDE DIMENSIONS (WxDxH)||75" x 94" x 92"|
Standard Features for High Temperature Walk-In Ovens
- UL Listed Control Panel
- Meets the Requirements of the Following Standards:
- NFPA 86 (Standard for Ovens and Furnaces)
- NFPA 70 (National Electric Code)
- FM (Factory Mutual)
- When processing combustible material fire protection should be considered
- Processing flammable solvents or vapors requires forced exhaust to provide safety ventilation. For more information see Class A Solvent Processing page at this website
- Adjustable manual reset excess temperature interlock to turn off heat on malfunction of main temperature controller
- Recirculating blower air flow safety switch to turn off heat on loss of recirculated air flow
- Electrical interlock shuts off heat if power to recirculating blower is interrupted
- Electric Heat Includes
- Separate heating element control contactors to turn off heat on malfunction of main control contactors
- Gas Heat Includes
- Modulating burner for 1000 BTU per cubic foot natural gas at 6” water column pressure – propane available. Inlet 1” NPT (1-¼ “ NPT above 350,000 BTU/hr input)
- Automatic pre-ignition purge period to clear accumulated gas or fumes
- Push button electric ignition
- Microprocessor based electronic flame safeguard protection to continuously monitor flame and close gas valves if flame is not present
- 325 CFM (650 CFM at 800,000 BUT/hr input) powered forced exhauster to provide combustion venting
- Exhauster air flow safety switch to close gas valves on loss of venting
- Two pilot valves to guarantee gas flow to pilot can be stopped
- High and Low gas pressure switches to confirm safe operating pressure range
- Two main burner safety shut off valves with valve seat position indicator to assure gas flow to main burner can be stopped
- Proof of closure switch on one main valve to prevent igniting pilot unless main valve is closed
- Leak test station at each pilot and main burner valve to allow testing for leakage through valve
- Digital temperature controller
- Heat chamber temperature controller on 1250⁰F models to limit heating element temperature
- Motor control push buttons and on-off heat switch
- LED pilot lights
- 5 kA short circuit current rating (SCCR)
- Choice of
- Recirculating air flow patterns – Combination or Horizontal air flow
- Electric or Gas heat
- 208 volt, 230 volt or 460 volt, 3-phase, 60 HZ – other input power available
- All welded construction
- Durable, electrically isolated, Incoloy tubular heating elements
- Heat source located in heat chamber to prevent radiant heating
- High pressure stainless steel recirculating blower
- Full coverage supply and return duct work with adjustable opposed louvers
- Adjustable fresh air intake and 6” diameter exhaust outlet damper
- Isolated inner oven surrounded by 10 lbs per cubic foot density rockwool insulation to eliminate heat transfer due to through metal and hot air leakage at panel seams
- 2” of refractory ceramic fiber covers heat chamber walls on 1050°F models; covers all inner oven walls on 1200°F models
- 16 gauge aluminized steel interior with steel structural members at 900°F, 16 gauge stainless steel heat chamber on 1050°F models, entire 16 gauge stainless steel interior on 1200°F models
- Insulated floor covered with steel plate (stainless steel on 1200°F models) – 4” thick on 900°F model, 6” thick on 1050°F and 7”thick on 1200°F models
- Exclusive construction is far superior to commonly used panel construction
- Aluminized steel exterior with Trilite Green enamel finish
- Brushed stainless steel control panel face
- Exceptionally heavy duty doors, hinges and door frame with explosion venting latches
- Dual fiberglass door gasket with stainless steel spring insert; one gasket seals to inside door surface and second seals to outer oven face
- Expansion joints on inner door surfaces to guarantee uniform sealing at all temperatures
- Slip flashing at doorway to allow inner oven to expand without affecting door sealing
- 3/8” thick steel front plate around doors to provide rigid sealing surface
- Fully assembled and factory tested for temperature uniformity
- 1 year limited warranty
Modifications & Accessories for High Temperature Walk-In Ovens
Programmable Temperature Controller
Oven modification adding a programmable Temperature Controller. Microprocessor based, digital indicating, thermocouple actuated, in lieu of standard controller.
-Program Parameters: 40 profiles of up to 50 steps each, a real-time clock with battery backup to allow starting profile at any time of day
-Digital Display, 4.3” color touch screen
-Accuracy, ±0.1% of span plus 1 degree display error
-Connectivity, Relay output for alarm or other notification, two (2) USB ports, Ethernet compatible
-Up to four (4) control channels of temperature, relative humidity or vacuum
-Monitor up to16 sensors
-Math and logic functions
-Digital inputs and outputs
Digital Timing Temperature Controller
Modification adding a Digital Timing Temperature Controller. Microprocessor based, incorporates 99 hour 59 minute timer, starts timing temperature reaches set point and shuts down oven at end of set time.
- Digital Display, two LED, alphanumeric, 4 digit displays; 0.875″ high for temperature display and 0.500″ high for set point display
- Accuracy, ±0.1% of span plus 1 degree display error
Accessory adding a Recording Thermometer. Thermocouple actuated.
- Record: 10″ diameter circular chart 24 hour chart rotation
- Digital Display: 0.56″ high, LED, alphanumeric, 4 digit display; LED status display
- Accuracy: ±0.25%of span plus 1 degree display error
SCR Power Controller
Electrical modification adding an SCR Power Controller. Features:
•Silicon controlled rectifier power controllers are completely solid state industrial controllers that ensure precise proportioning of electric power to the heating elements.
•Oven temperature is maintained smoothly and evenly over the entire temperature range of the unit.
•SCR power controllers minimize maintenance, as there are no moving parts or electrical contacts to wear out.
•Heating element fatigue is reduced since the elements do not cool between releases of electric power.
•Zero voltage firing, including the first one half cycle of voltage, minimizes radio frequency and electromagnetic interference.
•Transient voltage suppressor networks are included, and the units are provided with protective fusing.
Digital Shut Down Timer
Accessory adding a Digital Shut Down Timer. Shuts down oven, selectable range, continuous “hold” feature.
Install Customer Supplied Temperature Controller
Modification installing a customer supplied temperature controller in lieu of standard controller.
Digital Batch Timer
Oven modification adding a Digital Batch Timer. Uniformly timing batch operations, continuous alarm with door interlock, alarm sounds at end of preset time until door is opened or timer reset.
Supply Oven Without Controller
Supply without temperature controller. Supply cutout, thermocouple, and wires only. Customer to supply and install temperature controller.
Oven modification adding a programmable 24 hour, 7 day timer.
Modified Model B3-900 High Temperature Walk-In OvenSerial #: 420077
Heat treating parts on three 400 lbs. capacity roll out shelves
- MAX TEMP: 850ºF
- WORKSPACE DIMS (WxDxH): 72" x 78" x 78"
Modified Model B3-1050 High Temperature Walk-In OvenSerial #: 420079
Top mounted heat chamber, 8000 lbs. capacity flatbed loading truck for heat cleaning of large valve bodies
- MAX TEMP: 1000ºF
- WORKSPACE DIMS (WxDxH): 60" x 120" x 78"
1000◦F Walk-In OvenSerial #: 660505
Heating titanium screens. Vertical downward air flow, removable top mount heat chamber and 360 kW heat input.
- MAX TEMP: 1000ºF
- WORKSPACE DIMS (WxDxH): 72" x 156" x 96"
High Temperature Walk-In OvenSerial #: 113176A1014
For preheating weldments. 30,000 CFM, 30 HP recirculating blower providing front to rear air flow.
- MAX TEMP: 900ºF
- WORKSPACE DIMS (WxDxH): 108" x 120" x 115"