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.
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.
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
Vacuum Furnaces
Vector®: Single Chamber, 2-25 Bar Gas Quench CaseMaster® Evolution: Multi-Chamber Vacuum Oil Quench 4D Quench Single-Piece Flow Gas Nitriding Furnace PIT-LPC™ Vacuum Carburizing Vacuum Tempering Furnace Vacuum Aluminum Brazing CVI/CVD Furnaces Super IQ®: Gas Carburizing Furnace
Specifications Subject to Change without Notice
Request Quote/InfoResources
Brochure: Gas Nitriding Using the ZeroFlow® Process
Article: Nitrocarburizing for Automotive and Large-Volume Production
Video: Cambridge Heat Treating Puts ZeroFlow® Nitriding Process to the Test
Case Study: Automaker Saves Money With High Volume Gas Nitriding/Ferritic Nitro-Carburizing System
Article: Gas Nitriding, A Short History
Webinar: Precision Nitriding
