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NEW EQUIPMENT | ATMOSPHERE DRAW/TEMPERING FURNACES

 

 

 

OVERVIEW

Park's Gas Fired or Electrically Heated Re-Circulating Air Tempering Furnaces are engineered and constructed for drawing/tempering operations to 1250°F or 1400°F max.

Uniform temperature throughout the furnace is achieved by utilizing an alloy fan and baffle arrangement, which directs airflow from the heating chamber, through the load and back to the heating area.

Gas fired units are designed to meet or exceed Technical Safety Standard Authority's (TSSA) specifications. Electric units incorporate coiled heating elements mounted on a removable plug.

A solid state indicating temperature controller is standard equipment, however cam or electronic programmer, recorder/controller, etc. can be incorporated in the temperature control package.

Whenever possible, ceramic fibre insulation is used which assures rapid heat up and cool down, keeping operation costs to a minimum. A furnace with this type of insulation is lightweight and repairs are easily performed when necessary.

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SPECIFICATIONS

 

SPECIFICATION TABLE DRAW | TEMPERING

TEMPERATURE RANGE

 

UNIFORMITY

UNLIMITED

DIMENSIONS (OVERALL)

UNLIMITED

DIMENSIONS (INTERIOR)

UNLIMITED

POWER

200V - 600V / 1pH 3pH/ 50-60hZ

CONTROL

120/1/50-60

INSTRUMENTATION

Temperature Controller

Over Temperature Controller

Chart Recorder (Optional)

SCR (Optional)

Transformer (Optional)

Disconnect Switch

All Park Thermal Furnaces and Ovens come factory tested and Hydro Approved.

 

FURNACE OUTER SHELL

The furnace shell is fabricated from heavy mild steel plate fully welded gas tight and suitable reinforced with structural steel and a robust channel base. The furnace exterior is finished with a heat resistance industrial enamel paint.

INSULATION

FURNACE INSULATION

The furnace insulation is a combination of ceramic fibre layers engineered to ensure excellent insulating properties to provide a safe outer shell cold face temperature and also allows for fast heat-up and cool down of the furnace.

FURNACE HEATING

The furnaces can be supplied with either an electric heating element package or a gas fired package.

Electric heating packages consist of coiled 80/20 Nickel/Chrome elements, custom manufactured in house and mounted on an alloy frame and the plug assembly is designed to be easily removed for maintenance.

Indirect gas fired package consists of a complete gas valve train, complete with burner and a serpintine alloy radiant tube assembly which can be accessed for maintenance by removing the back plate of the furnace. Gas furnaces meet all gas safety standards. An additional feature is the supply of a flow meter on gas fired furnaces, to ensure a full 'stoichiometric' condition is recognized.

AIR CIRCULATION

Air re-circulation is achieved by the use of a roof mounted high temperature plug fan discharging across the ceiling through a louver plenium down into the work chamber and returning into the heating chamber located at the back of the furnace.

CHARGE SUPPORT

The furnace is supplied with two or three alloy roller rails supported by alloy piers or flat rails for loading by a forklift truck. The charge support is designed to meet the customers weight requirements.

DOOR ASSEMBLY

The furnace door is robust and constructed with the same materials as the furnace shell and is a vertical rising door operated by a helical worm gear drive system which ensures a very positive seal when in the closed position.

PANELPANEL

CONTROL PANEL

The furnace is complete with a NEMA 12 control panel completely pre-wired and user friendly. Park Thermal engineers the control panels with 'state of the art' controls including temperature and over-temperature controllers, temperature recorder, SCR power controller, (optional PLC) and all necessary switches, push buttons, relays, fuses, alarms, etc. The control panel is completely Hydro approved.

ATMOSPHERE CONTROL

The furnace is equipped with a nitrogen flow meter to control the flow of nitrogen atmosphere entering the work chamber.

FACTORY TESTING & OPERATIONAL INSTRUCTIONS

Prior to delivery, Park Thermal factory tests each furnace to ensure the equipment is properly set up to meet our customer's requirements.

The furnace is complete with a maintenance and operational manual, which includes start up instructions and dry-out procedures. Park Thermal also offers on site training and technical support.

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TECHNICAL INFORMATION

Park Thermal's Re-Circulating Atmosphere Draw/Tempering Furnaces have been engineered and designed with our customers needs and demands in mind, which include:

  • A robust steel plate outer shell construction.
  • Properly engineered re-circulation fan system with an adjustable louvered plenum for optimum uniformity.
  • Robust door construction and helical worm gear driven operation to provide a positive seal.
  • Ceramic fibre lining for fast heat-up and cool down.
  • Easy access to the heating equipment with an easily removable plug located on the side wall for access to the heating elements.
  • A removeable furnace back plate.
  • User friendly NEMA 12 control panel assembly.
  • Nitrogen flow scope to monitor and adjust the Nitrogen atmosphere.

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