Nitrex furnace picture

NX PIT-TYPE SERIES – Medium to High Volume Batch Processing

The heavy-duty NX Pit-Type Gas Nitriding / Nitrocarburizing Furnaces provide flexibility for a wide range of applications. By incorporating multiple controlled heating zones, temperature uniformity inside the retort is +/-5°C (9°F) or better. These furnaces are designed to have fast heat-up rates and a uniform temperature throughout the load. Optional internal cooling systems dramatically reduce cooling times, shortening total cycle time and maximizing furnace usage.

Enhance your nitriding system capabilities and process efficiencies with  Auxiliary Equipment

Main features

  • Inconel 600 (refractory steel) retort and racking for long service life and inactivity with regard to the nitriding atmosphere.
  • Uniform temperature distribution, obtained through independently controlled heating zones and intensive atmosphere circulation ensuring full control of nitriding potential in all stages of the process.
  • Light ceramic fiber insulation, reducing heat losses and thus energy consumption.
  • Kanthal long lasting heating elements.
  • Integrated cooling systems.
  • Larger furnaces may be equipped with a 'Turbo' cooler, for accelerated cooling of the load. This option is used where productivity is a major issue.
  • Some pit-type furnaces may be equipped with a vacuum purging system. This option significantly accelerates exchange of atmosphere in the retort and is very useful in nitriding of stainless steels.

System Characteristics - Working Zone Dimensions - Standard sizes

Pit-type nitriding furnaces (Round)

Working Zone Dimensions

Model Diameter Height Load Capacity
NX-615 23½”(600 mm) 59"(1500 mm) 2200 lbs (1000 kg)
NX-620 23½”(600 mm) 78¾”(2000 mm) 2600 lbs (1200 kg)
NX-815 31½”(800 mm) 59"(1500 mm) 3300 lbs (1500 kg)
NX-820 31½”(800 mm) 78¾”(2000 mm) 3850 lbs (1750 kg)
NX-825 31½”(800 mm) 98½"(2500 mm) 4400 lbs (2000 kg)
NX-1015 39"(1000 mm) 59"(1500 mm) 4400 lbs (2000 kg)
NX-1020 39"(1000 mm) 78¾”(2000 mm) 5500 lbs (2500 kg)
NX-1025 39"(1000 mm) 98½"(2500 mm) 6600 lbs (3000 kg)
NX-1215 47¼”(1200 mm) 59"(1500 mm) 6600 lbs (3000 kg)
NX-1220 47¼”(1200 mm) 78¾”(2000 mm) 8400 lbs (3800 kg)
NX-1225 47¼”(1200 mm) 98½”(2500 mm) 9900 lbs (4500 kg)
NX-1230 47¼”(1200 mm) 118"(3000 mm) 11570 lbs (5250 kg)
NX-1625 61"(1550 mm) 98½”(2500 mm) 13200 lbs (6000 kg)
NX-1630 61"(1550 mm) 118"(3000 mm) 15400 lbs (7000 kg)
NX-1635 61"(1550 mm) 137¾”(3500 mm) 17600 lbs (8000 kg)
NX-1645 61"(1550 mm) 177"(4500 mm) 22000 lbs (10000 kg)

NOTE: Nitrex Metal Inc. reserves the right to make changes without notice

Please contact Nitrex for non-standard sizes

Process capabilities

  • Nitreg® Potential-Controlled Gas Nitriding
  • Nitreg®-C Potential-Controlled Gas Nitrocarburizing
  • Nitreg®-S Potential-Controlled Gas Nitriding with In-Process Activation for Stainless Steels
  • Nano-S™ Potential-Controlled Gas Nitriding for Stainless Steels (with better corrosion resistance)
  • ONC® In-Process Post-Nitriding or Post-Nitrocarburizing Oxidation
  • Phase-Controlled Gas Nitriding and Nitrocarburizing