Gas Fired/Electric Pit Type Furnace by Therelek

Our pit furnaces are designed and manufactured for very small to very large workpieces. Pit furnace is available with or without retorts in customized dimensions and variations to carry out the complete heat-treatment process.

Pit furnaces are used in various applications like gears of wind power generation and bearings in the railway industry for gas carburizing and nitriding.

Features & Specifications

Title Description
Temperature range Up to 600°C (for low temperature) & Up to 1100°C (for high temperature)
Retort MOC AISI 304/AISI 310/AISI 316/AISI 330/Inconel 600
Insulation Vacuum Formed Ceramic Fibre Modules/Ceramic Fibre Blanket & Module/Refractory Brick Lining
Heating media options Electric/Gas Fired/Oil Fired
Heating elements Nichrome Wire/Special Alloy Resistance Heating Wire
Furnace classification Class 2/Class 3
Instrumentation options Process Automation Equipment, Thyristor, Programmable Temperature Controller, Temperature Recorder, PLC, SCADA, HMI
Standard applications Stress Relieving, Tempering


Types of Pit Type Furnace

Low Temperature Pit Type Furnace

Pit type air circulation furnaces are installed with the opening at ground level or just above it. These are low-temperature furnaces with operating temperatures up to 650°C.

More about Pit Type Low Temperature Furnace

High Temperature Pit Type Furnace

Pit type sealed retort furnaces are of a cylindrical design vertically erected with a positive sealing mechanism on top in order to contain and preserve heat and atmosphere during a process cycle.

More about Pit Type High Temperature Furnace

More about Pit Furnace


  • Stress relieving
  • Tempering
  • Annealing/Annealing under protective atmosphere
  • Isothermal Annealing
  • Carbonitriding
  • Carburizing
  • Decarb annealing
  • Gas Nitriding
  • Hardening
  • Stress Relieving
  • Wire annealing
  • Ferritic Nitro Carburizing
  • Normalizing
  • Case Hardening

Interested to know more?

Click on Get Quote, share your details and we will get back to you.

Get Quote