High Temp Heavy Duty Box Furnace
High Temp Heavy Duty Box Furnace
These furnaces are used for a variety of heat treating applications such as tempering, hardening, sintering or firing, including those applications requiring higher temperatures. Precision microprocessor based temperature controls and energy-saving insulation maximize the performance of these rugged units.
High Temp Heavy Duty Box Furnace Model Specifications:
Not for use with flammable solvents, vapors, or gases.
| Model | Workspace | Outside Dimensions*(WxDxH) | Max Temp | Heat Input | Insulation Thickness | Operating Characteristics† | Door Type | Height w/ Door Open | Hearth Rating | Approx Shipping Weight | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dimensions(WxDxH) | VolumeCu Ft | ElectricKW | GasBTU/HR | Control Accuracy | Temperature Uniformity | Rise Time (Electric) | Rise Time (Gas) | ||||||||
| HD-183618-HT | 18" x 36" x 18" | 6.8 | 59" x 81" x 77" | 2,200°F | 40 | 425,000 | 11" | ± 0.3% | ±25°F | 180 | 140 | 100" | 300 | 4,500 lbs | |
| HD-243618-HT | 24" x 36" x 18" | 9 | 65" x 81" x 77" | 2,200°F | 48 | 450,000 | 11" | ± 0.3% | ±25°F | 165 | 125 | 100" | 360 | 4,800 lbs | |
| HD-243624-HT | 24" x 36" x 24" | 12 | 65" x 81" x 83" | 2,200°F | 56 | 520,000 | 11" | ± 0.3% | ±25°F | 155 | 120 | 110" | 360 | 5,700 lbs | |
| HD-244824-HT | 24" x 48" x 24" | 16 | 65" x 94" x 83" | 2,200°F | 65 | 600,000 | 11" | ± 0.3% | ±25°F | 150 | 130 | 110" | 480 | 6,500 lbs | |
| HD-304830-HT | 30" x 48" x 30" | 25 | 71" x 94" x 89" | 2,200°F | 72 | 700,000 | 11" | ± 0.3% | ±27°F | 165 | 130 | 118" | 600 | 7,300 lbs | |
| HD-306030-HT | 30" x 60" x 30" | 31.3 | 71" x 105" x 89" | 2,200°F | 78 | 725,000 | 11" | ± 0.3% | ±27°F | 180 | 140 | 118" | 700 | 8,400 lbs | |
| HD-364836-HT | 36" x 48" x 36" | 36 | 77" x 94" x 95" | 2,200°F | 78 | 800,000 | 11" | ± 0.3% | ±30°F | 180 | 140 | 135" | 750 | 8,600 lbs | |
| HD-366036-HT | 36" x 60" x 36" | 45 | 77" x 105" x 95" | 2,200°F | 88 | 850,000 | 11" | ± 0.3% | ±30°F | 180 | 150 | 135" | 850 | 9,800 lbs | |
| HD-367236-HT | 36" x 72" x 36" | 54 | 77" x 117" x 95" | 2,200°F | 100 | 1,000,000 | 11" | ± 0.3% | ±30°F | 180 | 150 | 135" | 1000 | 10,500 lbs | |
| HD-484836-HT | 48" x 48" x 36" | 48 | 89" x 94" x 95" | 2,200°F | 90 | 915,000 | 11" | ± 0.3% | ±30°F | 180 | 150 | 135" | 925 | 9,500 lbs | |
| HD-484848-HT | 48" x 48" x 48" | 64 | 89" x 94" x 107" | 2,200°F | 110 | 1,100,000 | 11" | ± 0.3% | ±33°F | 165 | 130 | 159" | 1100 | 10,500 lbs | |
| HD-487248-HT | 48" x 72" x 48" | 96 | 89" x 116" x 107" | 2,200°F | 158 | 1,500,000 | 11" | ± 0.3% | ±35°F | 140 | 120 | 159" | 1600 | 13,500 lbs | |
* Outside Dimensions
- All Models: Control panel overhang 9″ right side.
- Gas Models: Combustion blower overhang 36″ rear.
- Electric Models: Transformer overhang 24″ rear.
† 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 Temp Heavy Duty Box Furnace
| MODEL | HD-484848-HT |
|---|---|
| MAXIMUM OPERATING TEMP | 2,200°F |
| AIR FLOW | Radiant |
| CONTROL ACCURACY | ± 0.3% |
| OVEN UNIFORMITY | ±33°F |
| RISE TIME - ELECTRIC | 165 mins |
| RISE TIME - GAS | 130mins |
| WORKS SPACE DIMENSIONS (WxDxH) | 48" x 48" x 48" |
| SHELVES INCLUDED | None |
| NUMBER OF SHELVES MAX | None |
| SHELF CAPACITY | None |
| MAX LOAD CAPACITY | Not Available |
| DOORS | Air |
| LOADING METHOD | Floor |
| APPROXIMATE SHIP WEIGHT | 10500 lbs |
| OUTSIDE DIMENSIONS (WxDxH) | 89" x 94" x 107" |
Standard Features for High Temp Heavy Duty Box Furnace
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
- Not for use with flammable solvents or vapors. Other models available for these applications. For more information see Class A Solvent Processing page at this website
Safety Equipment
- Adjustable manual reset excess temperature interlock to turn off heat on malfunction of main temperature controller
- Electric Heat Includes
- Separate heating element control contactors to turn off heat on malfunction of main control contactors
- Door interlock turns off power to heating elements when door is opened to protect operator from line voltage at heating elements
- Gas Heat Includes
- Multiple modulating burners fired under hearth from opposing sides to circulate heated air
- Automatic pre-ignition purge period to clear accumulated gas or fumes from furnace
- Push button electric ignition
- Microprocessor based electronic flame safeguard protection for each burner to continuously monitor flame and close gas valves if flame is not present
- Combustion air blower
- Combustion Blower air flow safety switch to close gas valves on loss of combustion air flow
- High and Low gas pressure switches to confirm safe operating pressure range
- Two pilot valves for each pilot to guarantee gas flow to pilot can be stopped
- Two main safety shut off valves for each burner with valve seat position indicator to assure gas flow to each main burner can be stopped
- Proof of closure switch on one main valve at each burner 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
- Door interlock drives main burners to low fire as door is opened to protect operator from flames
Controls
- Digital temperature controller
- LED pilot lights
- On-off heat switch
- 5 kA short circuit current rating (SCCR)
Construction
- Choice of
- Air or Inert Atmosphere construction
- Electric or Gas heat (Air construction only)
- 208 volt, 230 volt or 460 volt, 3-phase, 60 HZ – other input power available
- All welded construction
- High temperature Kanthal AF rod overbend heating elements beneath hearth and hanging from J-hooks on vertical walls
- Rear mounted power transformer provides low voltage for heating elements
- 1000 BTU per cubic foot natural gas at 2 psig pressure – propane available. Inlet 1” NPT up to 800,000 BTU/hr, 1-¼ “ NPT to 1,000,000 BTU/hr, 1-½” NPT above 1,000,000 BTU/hr
- Insulated with 4” of light weight, energy saving refractory ceramic fiber and 7” of firebrick (roof insulation 10” of Refractory Ceramic Fiber)
- Load supporting floor insulated with 4” of 18-½ lbs per cubic foot density 1900⁰F block and 7” of firebrick
- 3/16” steel plate reinforced furnace shell with Trilite Green enamel finish
- ½” thick steel front plate around door
- Fire brick throat and doorsill to protect furnace during loading
- Brushed stainless steel control panel face
- Powered vertical lift door
- Electric door: Electromechanical operator pivots door, supported by structural steel arms and bearings, upward above furnace
- Air door: Air cylinder lifts door hanging from heavy duty roller chain supported by sprockets, shaft and pillow block bearings
- Door hot side faces away from operator
- Soft insulation on door hot face seals against throat brick and steel front plate
- 2” thick , heavy duty ceramic hearth plates supported by fire brick piers
- Fully assembled and factory tested
- 1 year limited warranty
Modifications & Accessories for High Temp Heavy Duty Box Furnace
-
Alloy Hearth Tray
Furnace accessory adding a Alloy Hearth Tray – 253MA to 2000 F, 330 to 2200 F. Alloy protects ceramic hearth plates from impact and heavy loading.
-
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
- Also Available:
- Up to four (4) control channels of temperature, relative humidity or vacuum
- Monitor up to16 sensors
- Math and logic functions
- Digital inputs and outputs
- Data logging
- Graphic Trending
-
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
-
Recording Thermometer
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 insure 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.
Custom Furnaces
-
Model HD-244824-ATM Inert Atmosphere High Temperature Furnace
Serial #: 700036Brick interior with rod overbend heaters
- MAX TEMP: 2200ºF
- WORKSPACE DIMS (WxDxH): 24" x 48" x 24"
