Norgren R22-401-RNMA Pressure Regulator - NACE MR-0175
Part Number: R22-401-RNMA
Quick Summary
R22-401-RNMA is a stainless steel pressure regulator delivering precise compressed air control for harsh industrial environments. Engineers often face corrosion, fluctuating downstream pressure, and high maintenance in demanding settings, which this unit is designed to mitigate. It carries NACE MR-0175 compliance and Lloyd's Register type approval, supporting safe, compliant operation in marine, oil & gas, and chemical facilities. Beyond certification, the stainless steel construction, wide 0.4–10 bar range, and compact form deliver reliable regulation with lower maintenance costs. Designed for engineers evaluating life-cycle costs, it reduces downtime and simplifies compliance documentation. The combination of corrosion resistance and proven performance translates into predictable production and safer, longer-lasting air systems.
Product Information
Extended Description
R22-401-RNMA Norgren: Materials meet NACE recommendations (MR-0175) | Lloyd's register type approved | Applications include marine, oil and gas, chemical and industrial compressed air systems
Medium
Compressed air
Operating Temperature
-20 ... 80 °C, -4 ... 176 °F
Standard
NACE MR-0175, 2002 revision
Port Size
1/2" PTF
Gauge Port
1/4" PTF
Adjustment
T-bar
Maximum Inlet Pressure
20 bar
Outlet Pressure Adjustment
0.4 ... 10 bar, 6 ... 145 psi
Relieving / Non Relieving
Relieving
Flow
50 dm3/sec, 106 scfm
Materials - Adjusting Knob
Stainless steel
Materials - Body
Stainless steel
Materials - Bonnet
Stainless steel
Materials - Elastomers
Synthetic rubber
Dimensions - Height
186 mm
Dimensions - Length
58 mm
Dimensions - Width
89 mm
Weight
1.52 kg
Country of Origin
Mexico
Range
R22
Series
Stainless Steel
Brand
IMI Norgren
18-001-959
R22 Neck Mounting Bracket
18-001-962
Ported Wall Bracket for 22 Series
R22-100R
R22 Service kits
Stainless steel construction across the body, bonnet, and adjusting knob delivers superior corrosion resistance in salt spray and chemical environments. This translates into longer service life and lower maintenance cycles in demanding industries such as marine and oil and gas. Relieving regulation provides safe venting and stable downstream pressure, reducing risk to equipment and personnel in high-demand air circuits. The R22-401-RNMA’s 1/2 inch PTF port and 1/4 inch gauge port enable straightforward integration with standard piping and monitoring setups, simplifying retrofits and new installations alike. With an adjustable outlet range of 0.4 to 10 bar and a maximum inlet of 20 bar, it offers a broad operating envelope for varied process requirements while maintaining tight control. The T-bar adjustment and robust elastomer seals ensure reliable setpoints with minimal drift, even in fluctuating load conditions. Mounting options such as the R22 neck bracket and wall brackets provide flexible installation in enclosures, skid frames, or machinery housings, improving accessibility for service. The use of stainless steel components and synthetic rubber elastomers enhances chemical resistance and thermal stability, supporting longer service intervals in challenging environments. Industry-specific insight shows these features translate to lower total cost of ownership by reducing unplanned downtime and extending the interval between service interventions.
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FAQs
Install the regulator in the straight portion of the compressed air line using compatible 1/2" PTF fittings. Ensure the gauge port is accessible for monitoring and that the mounting orientation matches the intended flow path to avoid vibration. Use the T-bar to set the desired outlet pressure within 0.4–10 bar and verify the inlet pressure does not exceed 20 bar. Check seals and tighten fittings to avoid leaks during commissioning.
Key specs include medium: compressed air; operating temperature -20 to 80 °C; standard: NACE MR-0175 (2002 revision); port size: 1/2" PTF; gauge port: 1/4" PTF; outlet pressure adjustment: 0.4–10 bar; maximum inlet pressure: 20 bar; relieving regulation; flow: 50 dm3/sec (106 scfm); materials: stainless steel body and knob, synthetic rubber elastomers; dimensions: 186 mm height, 58 mm length, 89 mm width; weight: 1.52 kg; origin: Mexico.
Yes. The regulator features NACE MR-0175 compliance and Lloyd's Register type approval, with stainless steel construction suitable for corrosive, offshore, and other demanding service. Its wide operating range and robust mounting options help ensure reliable performance in harsh environments commonly found in marine, chemical processing, and upstream energy applications.
The product is NACE MR-0175 compliant (2002 revision) and Lloyd's Register type approved. These certifications indicate suitability for corrosion-prone and safety-critical environments, validating material integrity, design reliability, and compliance with industry standards for offshore and hazardous processes. This reduces regulatory risk and supports long-term asset reliability.
Service kits for the R22 series are available (for example, R22-100R service kits) to simplify maintenance and extend life cycles. These kits typically include essential seals and diaphragms compatible with the R22 family, helping minimize downtime during routine maintenance and ensuring consistent regulator performance in demanding environments.