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3 CuFt Heat Treating Furnace
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General specifications:
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 3Cu Ft Heat treating furnace |
Our large heat treating furnace contains a usable zone of nearly 3 cubic feet and is capable of temperatures up to 2200C and can be equipped with many options.
With an 800lbs load limit, it features a high load capacity. The unit shown here features a 16" diffusion pumping system, and gas heat exchanger.
The hot zone features tungsten, molybdenum or tantalum mesh or wafer-rod heating elements, insuring excellent uniformity and product compatibility.
With it's high load capacity and large size, this furnace is aimed for production for processing large batches of product.
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The chamber is loaded from the front and contains a Hot Zone with a 12" x 12" x 28" usable zone
and a +/- 10C temperature gradient. The heating element is comprized of 6 identical mesh or rod heating panels, providing 4 sided heating. The elements feature excellent uniformity and longivity. The furnace chamber is
manufactured from doubled-walled stainless steel
welded together and polished for a clean finish and good vacuum integrity. Plenty of ports are incorporated for auxliary equipment and sensors. The hot zone shields are mounted in a chamber frame, allowing for the thermal growth of the zone during the heat cycling. The optional gas heat exchanger allows for quick-cooling down to room temperature.
The furnace load is placed on the load frame. The load frame supports are engineered to feature a high load capacity and a low thermal conductivity loss to the chamber walls.
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Power to the hot zone is supplied by a Three Phase SCR controlled power supply, including a circuit breaker, a contactor, an SCR to modulate the power to the hot zone, a main stepdown transformer matched to meet the heating element resistance, Volt and Amp Meters, and a set of water-cooled power cables to supply power to the furnace.
Two control options are available, a control panel with switches, lights, temperature controller and vacuum instrument, or a Computer Interface package with HMI software and Industrial touchpanel PC. Both offer full control of the furnace and are easy to operate. The Computer package adds data acquisition, alarms, recipe storage, security and networking.
| With the control panel option, you get panels, lights, and major brand controllers for the temperature, gas, and vacuum system. A silkscreen provides a graphical representation of the furnace and allows the user to quickly observ, follow, and control the condition of the furnace. |
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| If optioning for the computer package, the PLC is used to control temperature, and other system components such as vacuum and gas. Since the instrument reads and controls temperature and pressure, other instruments can be eliminated thus simplifying operation and configuration.The controller interfaces with the PC and transmits the temperature,power and vacuum readings. This instrument also controls all digital logic required to control the solenoid valves, motor starters, interlocks, gas system, and vacuum system. |
HMI Sample screen |
A type "C" sheathed and coated thermocouple is supplied and can be used to measure the furnace temperature up to 2300C. A safety over-temperature controller will shut of power to the hot zone if the maximum operating temperature is exceeded..
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Many differrent vacuum systems are available on this system, depending on the atmospheric requirements:
For more information on our vacuum systems, please visit our technical page.
An inert or Hydrogen gas system can be supplied to provide an inert or reducing environment for the work samples during the heat testing. The process Gas System (Argon): includes
solenoid-operated inlet valve, a Compound Gauge (30 P.S.I.G. x
30 in. Hg.), a gas flow meter, and a 2 P.S.I.G. outlet relief
valve to maintain a positive pressure. There is also a 5
P.S.I.G. over-pressure safety relief valve. For operation in Hydrogen, additional solenoids and sensors are supplied to provide safe and reliable operation. A burn-off kit will burn and monitor any flammable gas exiting the furnace, a safety blow-off port is provided to relieve any excessive chamber pressure. For a quick cool down to atmosphere in gas, a water cooled gas heat exchanger can be provided.
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The Furnace Water cooling manifold consists of multiple circuits to adequately cool all the furnace parts and includes a strainer, pressure regulator, pressure gauge, water inlet and outlet manifold,
a water flow switch as a visual water flow indicator
with a flow interlock to protect the furnace in the event of a
water flow failure. This switch turns off power to the hot zone
contactor if water flow is below recommended minimum for a certain amount of time. Each part of the furnace is supplied with a separate cooling circuit that can be regulated by independent manual ball valves.
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| Power: | 140 KVA, 380-480-575 V/3/50-60 Hz |
| Water: | 17 G.P.M. @ 60 o F and 50 P.S.I.G. |
| Process Gas: | Argon or Nitrogen, Hydrogen 80 L.P.M. @ 50 P.S.I.G. |
| Compressed Air: | 60-90 P.S.I.G. filtered. |
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