Tempering Furnace
Tempering Furnace
These furnaces are used for a variety of heat treating applications including those requiring inert atmospheres. Recirculating blower provides high velocity vertical down air flow for excellent heat transfer. Precision microprocessor based temperature controls and energy-saving insulation maximize the performance of these rugged units.
Tempering 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) | ||||||||
| TF-183618 | 18" x 36" x 18" | 6.8 | 35" x 87" x 74" | 1,400°F | 30 | 190,000 | 7" | ± 0.3% | ±12°F | 95 | 85 | 78" | 400 | 3,100 lbs | |
| TF-243624 | 24" x 36" x 24" | 12 | 47" x 92" x 80" | 1,400°F | 42 | 285,000 | 7" | ± 0.3% | ±14°F | 95 | 85 | 90" | 600 | 4,000 lbs | |
| TF-304830 | 30" x 48" x 30" | 25 | 53" x 106" x 86" | 1,400°F | 52 | 355,000 | 7" | ± 0.3% | ±14°F | 90 | 80 | 102" | 900 | 5,200 lbs | |
| TF-364836 | 36" x 48" x 36" | 36 | 59" x 111" x 126" | 1,400°F | 65 | 450,000 | 7" | ± 0.3% | ±20°F | 90 | 80 | 126" | 1100 | 6,400 lbs | |
| TF-366036 | 36" x 60" x 36" | 45 | 59" x 121" x 126" | 1,400°F | 74 | 510,000 | 7" | ± 0.3% | ±20°F | 90 | 80 | 126" | 1300 | 6,800 lbs | |
| TF-484848 | 48" x 48" x 48" | 64 | 71" x 114" x 150" | 1,400°F | 100 | 660,000 | 7" | ± 0.3% | ±22°F | 80 | 70 | 150" | 1500 | 8,700 lbs | |
| TF-487248 | 48" x 72" x 48" | 96 | 71" x 152" x 150" | 1,400°F | 120 | 800,000 | 7" | ± 0.3% | ±22°F | 80 | 70 | 150" | 2200 | 9,950 lbs | |
* Outside Dimensions
- All Models:
- Control panel overhang 9″ right side.
- Blower motor overhang 18″ rear except 20″ on 15 HP.
- Gas Models:
- Burner overhang 18″ right side.
- 325 CFM exhauster to 510,000 BTU/HR, 650 CFM above.
† 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 Tempering Furnace
| MODEL | TF-487248 |
|---|---|
| MAXIMUM OPERATING TEMP | 1,400°F |
| AIR FLOW | Bottom to Top, Forced Convection |
| CONTROL ACCURACY | ± 0.3% |
| OVEN UNIFORMITY | ±22°F |
| RISE TIME - ELECTRIC | 80 mins |
| RISE TIME - GAS | 70mins |
| WORKS SPACE DIMENSIONS (WxDxH) | 48" x 72" 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 | 9950 lbs |
| OUTSIDE DIMENSIONS (WxDxH) | 71" x 152" x 150" |
Standard Features for Tempering 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
- Recirculating blower air flow safety switch to turn off heat on loss of recirculated air flow
- Electric Heat Includes
- SCR Power Controller
- Separate heating element control contactors to turn off heat on malfunction of main control contactors
- Gas Heat Includes
- 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 510,000 BTU/hr input) stainless steel 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
- 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 alloy coiled wire heating elements supported in alloy rack
- Modulating burner for 1000 BTU per cubic foot natural gas at 2 psig pressure – propane available – propane available. Inlet 1” NPT
- Heat source located in heat chamber to prevent radiant heating
- High pressure, air cooled, 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
- 16 gauge 304 stainless steel work space interior
- Refractory fiber and fire brick heat chamber
- Insulated with 2” of rockwool and 5”of light weight, energy saving refractory ceramic fiber
- Load supporting floor insulated with 2” of 18-½ lbs per cubic foot density 1900⁰F block and 4-½” 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
o Electric door: Electromechanical operator pivots door, supported by structural steel arms and bearings, upward above furnace
o 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
- Stainless steel grate at bottom of work space for loading
- Fully assembled and factory tested
- 1 year limited warranty
Modifications & Accessories for Tempering Furnace
-
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
-
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.
-
Program Timer
Oven modification adding a programmable 24 hour, 7 day timer.
-
Automatic Door Switch
Oven modification adding an Automatic Door Switch. Turns off blower and heat when door is opened, restores blower and heat on electric models. Restores blower-only on gas models when door is closed.
-
Equipment Shut Down Via Event Output
Modification adding a Equipment Shut Down Via Event Output. Shuts down oven via event output on programmable controller.
