July 28, 2023

Lindberg/MPH Ships Three RO Pit Furnaces with Nitrogen Atmosphere

Lindberg/MPH, a leading manufacturer of heat treat furnaces and nonferrous melting and holding equipment, announced the shipment of three (3) electrically heated, RO pit furnaces with air-cooled fans. The furnaces will be used for heat treating various steel components in a Nitrogen atmosphere.

These heat treating pit furnaces have a maximum temperature rating of 2,000°F and are designed to handle a wide range of part sizes. Two (2) of the units have work chamber dimensions of 28" diameter x 36" depth and a maximum gross workload of 2,000 lbs each. The third furnace has work chamber dimensions of 60” diameter x 109” depth and a maximum gross workload of 20,000 lbs.

All of the pit furnaces have pneumatically operated lids with 3-way hand control valves and limit switches that disconnect power to the heating elements when the covers are open. The pit furnaces are electrically heated with heavy duty rod overbend heating elements.

The control systems include Allen Bradley programmable logic controllers with an easy to use touch screen operator interface. Eurotherm high limit controllers are installed on each unit that trigger visual and audible alerts in the event the furnace temperature exceeds the setpoint as well as disconnect the power to the heating elements. 

“These pit furnaces are designed for a nitrogen atmosphere and have the combined capacity to process a workload of 24,000 lbs. They have been designed to utilize three independent heating zones for optimal temperature uniformity and meet AMS 2750G Class 3”

-Kelley Shreve, General Manager

Unique features of these RO pit furnaces include:

  • Pneumatically operated lid with 3-way hand control valve

  • Nitrogen atmosphere capability

  • Vacuum formed ceramic fiber modules with low heat storage for rapid heat up rates

  • Designed for pit style installation when required

  • Heated by heavy gauge rod overbend heating elements

  • Programmable temperature controller with easy to us touch screen operator interface

  • High limit controller with visual and audible alarms if temperature exceeds setpoint




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