E-JIN Heating System Co., Ltd.

Business Field

Pit Type Heat Treatment Furnace


Pit Type Heat Treatment Furnace is for putting atmosphere gas in and installing inside subsidiary facilities for particular purposes, various kinds of heat treatment functions that you can add include: carburizing, nitriding, quenching, tempering, normalizing, annealing, stress relief heat treatment, etc.
Heating part is divided into several parts depending on the inner pot length and each part is controlled by a digital network system to actualize the best optimal temperature departure.
Always considering safety first, it includes a digital sensor and digitalized each gas input. This is the newest equipment that can be able to operate semi-driving and recording at the same time.


  • Carburizing Heat Treatment : Tempering Furnace
  • Carburizing Heat Treatment : Water Tank / Oil Tank / Carburizing Furnace
  • Carburizing Heat Treatment : Tempering Furnace / Oil Furnace / Carburizing Furnace
  • Carburizing Furnace
  • Tempering Uurnace
  • Oil Tank (Oil Quenching)
  • Alkali Washing Equipment (Patent Pending)
  • Methanol Storage Tank
  • C.P. Control Panel
  • N2 / Methanol Control Panel

The Special Feature of Carburizing Furnace

Working Temperature Max. 1,000℃
Input Fluid Methanol, Nitrogen, LP Gas, Air
Carburizing Pattern Temperature rising, cracking, carburizing, diffusing, cool-down, quenching
  • Vacuum Purge Type Pressure Gas Nitriding Furnace (Patented)
  • Gas Nitriding Furnace (Oxy-Nitriding, Nitriding, Soft-Nitriding)
  • Gas Nitriding Furnace & Nitrogen Pressure Tempering Furnace
  • Quenching-Tempering / Stress-Relife / Annealing / Normalizing Heat Treatment Furnace

The Special Feature of Vacuum Purge Type Pressure Gas Nitriding Furnace

Working Temperature Max. 700℃
Cooling Time Within 4hours after maintaining the heat (580℃ ~ Below100℃)
Input Fluide Nitrogen, Ammonia, LPG, Carbon Dioxid
POT Inner Cooling System Vacuum type cooling fan, 3-Way Heat Exchanger set up
POT outer Cooling System Suction & exhaust blowers installed, automatic opening and
shutting of thermal exhaust

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