High Temperature Cabinet Ovens
- Grieve - HA-1050 ,HA-1250, HX-1050, HX-1250 and more
- Heat chamber temperature controller on 1250⁰F models to limit heating element temperature
- Motor control push buttons and on-off heat switch
- LED pilot lights
High temperature cabinet ovens are ruggedly built for long hard usage at elevated temperatures, offering a choice of two air flow patterns.
Outside Dimensions
- Control panel overhang 9″ right side
- Blower motor overhang 17″ (26″ HC Series); H Series right side, V Series rear
- Electric model HX, HB, HZ, HY, HC—Heater terminal overhang 5″ rear and left side
- Gas Model—Burner overhang 15″; H Series left side, V Series 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
Certifications
- 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)
- OSHA
Caution:
- When processing combustible material fire protection should be considered
- Processing flammable solvents or vapors requires forced exhaust to provide safety ventilation
Safety Equipment
- 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
- 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 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
Controls
- 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)
Construction
- Choice of
* Recirculating air flow patterns – Horizontal or Vertical 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 4” diameter (6” on Gas Heat) exhaust outlet damper
- Channel shelf supports prevent shelves tipping
- Insulated with 2” of refractory ceramic fiber and 10 lbs per cubic foot density rockwool insulation
- 16 gauge 304 stainless steel interior with stainless hardware
- 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
- Slip flashing at doorway to allow inner oven to expand without affecting door sealing
- Dual fiberglass door gasket with stainless steel spring insert; one gasket seals to inside door surface and second seals to outer oven face
- Fully assembled and factory tested for temperature uniformity
READ ON OUR BLOG:
Standard & custom-made Grieve ovens in action
*** 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.
| 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) | |||||
| HA-1050 | 20" x 20" x 20" | 4.6 | 48" x 45" x 60" | 1,050°F | 700 | ½ | 15 | 132,000 | 10" | ±0.3% | ±8°F | 58 | 35 | 1,885 lbs |
| HA-1250 | 20" x 20" x 20" | 4.6 | 52" x 49" x 64" | 1,250°F | 1,000 | ¾ | 20 | 200,000 | 12" | ±0.3% | ±11°F | 66 | 46 | 2,195 lbs |
| HX-1050 | 38" x 20" x 26" | 11.4 | 66" x 45" x 66" | 1,050°F | 1,000 | ¾ | 20 | 200,000 | 10" | ±0.3% | ±8°F | 66 | 36 | 2,965 lbs |
| HX-1250 | 38" x 20" x 26" | 11.4 | 70" x 49" x 74" | 1,250°F | 1,200 | 1 | 30 | 200,000 | 12" | ±0.3% | ±11°F | 67 | 46 | 3,570 lbs |
| HB-1050 | 38" x 26" x 38" | 21.7 | 68" x 51" x 82" | 1,050°F | 1,600 | 1 ½ | 30 | 200,000 | 10" | ±0.3% | ±8°F | 51 | 36 | 3,590 lbs |
| HB-1250 | 38" x 26" x 38" | 21.7 | 72" x 55" x 86" | 1,250°F | 1,600 | 1 ½ | 40 | 200,000 | 12" | ±0.3% | ±11°F | 69 | 50 | 4,325 lbs |
| HZ-1050 | 38" x 26" x 50" | 28.6 | 68" x 51" x 94" | 1,050°F | 2,000 | 2 | 40 | 200,000 | 10" | ±0.3% | ±8°F | 52 | 39 | 3,740 lbs |
| HZ-1250 | 38" x 26" x 50" | 28.6 | 72" x 55" x 98" | 1,250°F | 2,000 | 2 | 60 | 350,000 | 12" | ±0.3% | ±11°F | 65 | 49 | 4,410 lbs |
| HY-1050 | 38" x 38" x 38" | 31.8 | 68" x 63" x 82" | 1,050°F | 2,000 | 2 | 40 | 200,000 | 10" | ±0.3% | ±8°F | 54 | 46 | 4,130 lbs |
| HY-1250 | 38" x 38" x 38" | 31.8 | 72" x 67" x 86" | 1,250°F | 2,000 | 2 | 60 | 350,000 | 12" | ±0.3% | ±11°F | 60 | 48 | 4,870 lbs |
| HC-1050 | 50" x 50" x 50" | 72.3 | 100" x 77" x 106" | 1,050°F | 3,750 | 3 | 80 | 500,000 | 10" | ±0.3% | ±8°F | 75 | 46 | 7,590 lbs |
| HC-1250 | 50" x 50" x 50" | 72.3 | 104" x 81" x 110" | 1,250°F | 4,200 | 5 | 120 | 700,000 | 12" | ±0.3% | ±11°F | 90 | 48 | 9,140 lbs |
| VA-1050 | 26" x 26" x 38" | 14.9 | 46" x 66" x 73" | 1,050°F | 1,600 | 1 ½ | 24 | 132,000 | 10" | ±0.3% | ±9°F | 91 | 66 | 3,245 lbs |
| VA-1250 | 26" x 26" x 38" | 14.9 | 50" x 70" x 77" | 1,250°F | 1,600 | 1 ½ | 30 | 200,000 | 12" | ±0.3% | ±12°F | 101 | 73 | 4,010 lbs |
| VB-1050 | 26" x 38" x 50" | 28.6 | 46" x 78" x 85" | 1,050°F | 1,600 | 1 ½ | 30 | 200,000 | 10" | ±0.3% | ±9°F | 76 | 53 | 3,810 lbs |
| VB-1250 | 26" x 38" x 50" | 28.6 | 50" x 82" x 89" | 1,250°F | 1,600 | 1 ½ | 40 | 350,000 | 12" | ±0.3% | ±12°F | 85 | 65 | 4,650 lbs |
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