February 21, 2022

Lindberg/MPH Ships Two Electrically Heated Nitrogen Pit Furnaces to the Manufacturing Industry

Lindberg/MPH announced the shipment of two electrically heated nitrogen pit furnaces to the manufacturing industry. These furnaces are configured for process applications requiring a maximum furnace temperature of 1250°F in a nitrogen atmosphere.

The load space is 39 inches diameter and 49 inches deep, the chamber is larger and provides clearance for loading baskets and fixtures, and there is a maximum workload of 4,980 lbs.

The outer shell is constructed of heavy gauge steel and is reinforced with structural steel members. The entire shell is supported by heavy gauge steel legs and features refractory lining composed of thermal efficient ceramic fiber insulating modules.

A set of type “K” thermocouples will be installed on the furnace to measure the temperature of the atmosphere before entering the workload. One thermocouple is for the process temperature controller and the other for the high temperature controller.

“These furnaces feature a retort which is structured as a cylindrical shell with a solid bottom. It also includes a sealing trough at the top, that is lined with a gasket, which seals with the furnace cover lid. With this specific furnace, there is a fan that circulates heat and atmosphere evenly throughout the work chamber. The fan is an atmosphere tight sealed, alloy propeller type. We also provided an alloy work support structure that is positioned on the floor of the furnace to support the customer’s workload above the circulating fan.”

- Bill St. Thomas, Business Development Manager

Unique features of these pit furnaces include:

  • Steel construction

  • Helical coiled nichrome heating elements

  • Stainless steel permanent baffle

  • Standard Lindberg/MPH design

  • Manually adjustable flowmeter

  • Eurotherm 3500 series programable temperature controller 


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