Norgren R22-401-RNFA Pressure Regulator - NACE MR-0175
Part Number: R22-401-RNFA
Quick Summary
R22-401-RNFA is a stainless steel pressure regulator for compressed air systems used in marine and industrial environments. Engineers often struggle with corrosion, downtime, and inconsistent output when selecting rugged regulators for harsh conditions. This model meets NACE MR-0175 (2002 revision) and carries Lloyd's Register type approval, delivering proven reliability in challenging applications. With a robust 1/2" PTF port and a precise T-bar adjustment, it supports scalable system design, easy installation, and predictable performance. By combining corrosion resistance with regulatory compliance, it offers a clear value in offshore, chemical, and heavy industrial air networks while remaining compatible with standard Norgren R22 mounting accessories.
Product Information
Extended Description
R22-401-RNFA 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 bar, 0 ... 58 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 provides superior corrosion resistance in marine and chemical environments, reducing maintenance cycles and downtime, which translates to lower lifecycle costs for offshore plants. The regulator's relief design protects equipment from overpressure, improving safety and minimizing the risk of pneumatic system failures in hazardous environments. A 0-4 bar outlet range and 20 bar maximum inlet pressure enable precise control for instrumentation and tool air supply, supporting consistent process performance and energy efficiency. The 1/2" PTF port with a 1/4" gauge port offers straightforward installation and optional monitoring, simplifying integration with existing piping and instrumentation layouts. T-bar adjustment ensures repeatable setpoints during periodic commissioning and field recalibration, eliminating guesswork and speeding up maintenance. The R22 family’s stainless steel body, bonnet, and adjusting knob, paired with synthetic elastomer seals, enhances long-term reliability in demanding service, while compatible mounting brackets like 18-001-959 and 18-001-962 simplify retrofits and enable secure panel or neck mounting. Overall, the solution supports compliance-driven projects, reduces total cost of ownership, and delivers predictable performance in marine, offshore, and industrial compressed air systems.
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FAQs
The R22-401-RNFA is designed for straightforward integration with standard mounting options such as the R22 Neck Mounting Bracket 18-001-959 and Ported Wall Bracket 18-001-962. It features a 1/2" PTF port and a 1/4" gauge port, enabling simple connection to common pipework and instrumentation while maintaining robust panel or neck mounting.
This regulator offers an adjustable outlet from 0 to 4 bar (0 to 58 psi) and supports a maximum inlet pressure of 20 bar. It is a relieving type regulator, providing safe pressure relief under fault conditions and helping protect sensitive downstream equipment in demanding air systems.
Yes. The unit uses stainless steel construction and is designed for harsh environments. It complies with NACE MR-0175 (2002 revision) and carries Lloyd's Register type approval, making it appropriate for marine, offshore, and chemical processing applications where corrosion resistance and regulatory compliance are critical.
Norgren offers the R22 service kit, specifically the R22-100R, to support routine maintenance and part replacements. Regular service using approved kits helps sustain performance, extend service life, and minimize unplanned downtime, while the regulator’s modular stainless components simplify field maintenance.
The 1/4" gauge port allows optional monitoring and instrumentation integration, improving visibility into system pressure without invasive changes. The T-bar adjustment enables precise, repeatable setpoints, reducing process variability and enabling quick recalibration during commissioning or after maintenance, which translates to improved process control and reduced operational risk.