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-304830-HT |
|---|---|
| MAXIMUM OPERATING TEMP | 2,200°F |
| AIR FLOW | Radiant |
| CONTROL ACCURACY | ± 0.3% |
| OVEN UNIFORMITY | ±27°F |
| RISE TIME - ELECTRIC | 165 mins |
| RISE TIME - GAS | 130mins |
| WORKS SPACE DIMENSIONS (WxDxH) | 30" x 48" x 30" |
| SHELVES INCLUDED | None |
| NUMBER OF SHELVES MAX | None |
| SHELF CAPACITY | None |
| MAX LOAD CAPACITY | Not Available |
| DOORS | Electric |
| LOADING METHOD | Floor |
| APPROXIMATE SHIP WEIGHT | 7300 lbs |
| OUTSIDE DIMENSIONS (WxDxH) | 71" x 94" x 89" |
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
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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
-
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 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.
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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.
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Supply Oven Without Controller
Supply without temperature controller. Supply cutout, thermocouple, and wires only. Customer to supply and install temperature controller.
-
Program Timer
Oven modification adding a programmable 24 hour, 7 day timer.
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"
