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First Choice Nitriding Furnace with ZeroFlow®

Single-chamber vacuum furnace with a proprietary process for regulated gas nitriding of machine parts, vehicles, aircraft, and tools.

Vacuum Nitriding Furnace Uses Less Ammonia for Lower Cost | SECO/VACUUM
Vacuum Nitriding Furnace Uses Less Ammonia for Lower Cost | SECO/VACUUM
Vacuum Nitriding Furnace Uses Less Ammonia for Lower Cost | SECO/VACUUM

Batch Gas-Nitriding Vacuum Furnaces

SECO/VACUUM offers gas nitriding furnaces in a variety of styles and models. The proprietary ZeroFlow® control technology uses only ammonia as a process gas thereby reducing gas usage and gas emissions.

SECO/VACUUM’s retort nitriding furnaces achieve optimum results by using uniform high convection heating, precision nitriding potential and ammonia control, along with vacuum purging to reduce operating costs to process a variety of metals.

Drive-train Retort-based furnaces with vacuum purge for:

  • Gas Nitriding
  • Ferritic Nitrocarburizing
  • Post Oxidation (black)
  • Stainless (activation) nitriding
  • Nitrosulfurizing
  • Tempering
  • Annealing

Furnace Styles For Nitriding/NitroCarburizing

  • Horizontal front-loading retort furnaces
  • Vertical pit-style retort furnaces
  • Electrically heated and natural gas heated designs (See more information on natural gas units in this video)


Request info or a quote on a ZeroFlow® Nitriding Furnace

Gas Nitriding Furnace Accessories

  • Vacuum purge
  • Turbo atmosphere cooler
  • Simulation tools for layer control

Benefits of Nitriding with ®

  • Lower operating costs
  • Attractive Return-on-Investment (ROI)
  • Precise control of case depth
  • Control of nitride layer formation (including white layer (compound zone))
  • Two-stage nitriding process without additions of dissociated ammonia or nitrogen
  • Simple ammonia-gas flow control
  • Advanced process monitoring/control
  • Low process gas consumption
  • Reduced gas emissions (over alternative gas nitriding processes)
  • In-situ process control
  • Sophisticated process monitoring/recording and historical trending with a user-friendly HMI
  • Remote monitoring and control (optional)

Industries Served and Typical Nitrided Parts

  • Automotive, Racing, Heavy & Light Truck, Off -Road (gears, crankshafts, injectors, piston rods), Agriculture, General Industrial
  • Aerospace, Aircraft, Rotocraft, Military and Defense (gears, pinions, actuators)
  • Industrial Machinery & Goods (crankshafts, casting plates, locating pins, springs)
  • Tool & Die (hot working dies, high-speed tool steel cutters)
  • Corrosion resistance and Wear Resistance. Galling Resistance and added Lubricity.

Materials

  • Low & Medium Alloy Steels (41xx, 43xx, 51xx, 86xx, 93xx series)
  • Nitralloy® Alloys
  • Stainless Steels (300 & 400 series, precipitation hardening grades)
  • Tool Steels (H-series, M-series)
  • Iron (ductile, gray)

Horizontal and vertical retort gas nitriding furnaces

Features

  • Vacuum purge for removal of air from the retort and for removal of the nitriding atmosphere at the end of the cycle
  • Automatic gas nitriding flow control for small or large loads
  • Supervisory control system to continuously adjust and monitor process parameters
  • Various grades of retort and internal alloys for long life (i.e. Inconel)
  • Lowest ammonia consumption in the industry
  • Burn-off stack to neutralize gas emissions from the system
  • Low inert gas consumption (nitrogen or other process gases) for applications other than nitriding (annealing and tempering).


Standard models in red

Horizontal
Model #
Useful Dimensions
in(mm)
Gross Load Weight
lbs(kg)
Working Temperature
°F(°C)
Temperature Uniformity
°F(°C)
Number of Heating Zones Furnace Heating Power
(kW)

HRNe*-60.60.90-750-6-ZF 24x24x36 (600x600x900) 1320
(600)
300-1380
(150-750)
±5 one 75
HRNe*-90.80.120-750-15-ZF
HRNg**-90.80.120-750-15-ZF
36x36x48 (900x900x1200) 3300
(1500)
300-1380
(150-750)
±5 three 150
HRNe*-100.100.150-750-25-ZF
HRNg**-100.100.150-750-25-ZF
40x40x60 (1000x1000x1500) 5500
(2500)
300-1380
(150-750)
±5 three 240

*HRNe - Horizontal Retort Nitrider - Electrically Heated
**HRNg - Horizontal Retort Nitrider - Natural Gas Heated


Standard models in red

Vertical
Model #
Diameter in(mm) Height in(mm) Gross Load Weight
lbs(kg)
Working Temperature
°F(°C)
Temperature Uniformity
°F(°C)
Number of Heating Zones Furnace Heating Power
(kW)

VRNe-100.200-650-25-ZF 39
(1000)
78
(2000)
5500
(2500)
300-1200
(150-650)
±5 three  
VRNe-120.300-650-50-ZF 47
(1200)
118
(3000)
1100
(5000)
300-1200
(150-650)
±5 three  
VRNe*-60.90-650-6-ZF 24
(600)
36
(900)
1320
(600)
300-1300
(150-700)
±5 two 40
VRNe-80.120-650-12-ZF 32
(800)
48
(1200)
2645
(1200)
300-1300
(150-700)
±5 two 80
VRNe-100.150.650-30-ZF 39
(1000)
59
(1500)
5500
(2500)
300-1300
(150-700)
±5 two 115
VRNe-120.150-650-30-ZF 48
(1200)
59
(1500)
6600
(3000)
300-1300
(150-700)
±5 two 135
VRNe-140.250-650-45-ZF 55
(1400)
98
(2500)
9900
(4500)
300-1300
(150-700)
±5 three 210
VRNe-160.250-650-60-ZF 63
(1600)
98
(2500)
13200
(6000)
300-1300
(150-700)
±5 three 225

*VRNe - Vertical Retort Nitrider - Electrically Heated


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