Norgren R22-405-NNMA Pressure Regulator - NACE MR-0175
Part Number: R22-405-NNMA
Quick Summary
The Norgren R22-405-NNMA pressure regulator delivers reliable air pressure control for demanding marine and industrial pipelines. In rugged environments with tight spaces, you need corrosion-resistant components that require minimal maintenance. It meets NACE MR-0175 and is Lloyd's Register type-approved, supporting offshore and chemical processing compliance. Its stainless steel body and 0.4–10 bar range align with high-demand applications, while the 1/2" PTF port simplifies integration in existing systems. The regulator is designed for non-relieving operation, reducing leak paths and gas loss in critical lines. With compatible mounting accessories and service kits, you can streamline installation and shorten maintenance cycles across multiple facilities. This combination supports rapid deployment in fleet maintenance and project delivery.
Product Information
Extended Description
R22-405-NNMA 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
Non-relieving
Flow
50 dm3/sec, 106 scfm
Materials - Adjusting Knob
Stainless steel
Materials - Body
Stainless steel
Materials - Bonnet
Stainless steel
Materials - Elastomers
Synthetic rubber
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-KIT
Service kit R22
R22-100R
R22 Service kits
Stainless steel construction across the body, bonnet, and adjusting knob delivers outstanding corrosion resistance in marine and offshore environments, as well as harsh chemical plants. This non-corrosive build minimizes pitting and scale formation, extending service life and reducing costly maintenance in continuous-duty compressed air networks. The non-relieving design further limits leakage paths, protecting downstream instrumentation and improving overall system reliability under fluctuating supply pressures. The 0.4–10 bar outlet pressure range is precisely set via a T-bar, delivering stable setpoints and predictable performance in media-laden or heat-affected lines. That stability reduces valve wear, minimizes pressure surges, and supports compliant operation in safety-critical pneumatic loops across manufacturing and process industries. For installers, the combination of adjustable pressure and non-relieving construction translates into easier commissioning and fewer field retunes. A 1/2" PTF inlet and a 1/4" PTF gauge port simplify integration with standard piping and instrumentation. The porting layout, along with stainless steel body, enables straightforward retrofits into existing R22 systems, reducing modification costs and downtime. R22 service kits (R22-KIT, R22-100R) and compatible mounting brackets (18-001-959, 18-001-962) support proactive maintenance and flexible installation options. Operating across -20 to 80 °C makes the regulator usable in diverse climates, from arctic plants to tropical offshore platforms. The 50 dm3/s (106 scfm) flow capability matches typical heavy-duty pneumatic circuits without compromising response time or control accuracy. Coupled with a robust stainless steel build, this regulator remains dependable in demanding applications such as marine equipment, oil and gas instrumentation, and chemical processing. Certified to NACE MR-0175 and Lloyd's Register type approved, the R22-405-NNMA meets stringent offshore and petrochemical industry requirements. These certifications reduce qualification steps for procurement teams, accelerate project timelines, and support ongoing regulatory compliance across operations. The combination of corrosion resistance, reliable pressure control, and proven approvals makes it a solid choice for high-stakes environments.
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FAQs
Plan for the 1/2" PTF inlet and 1/4" PTF gauge port when routing piping and instrumentation. Use mounting brackets 18-001-959 (R22 Neck Mounting Bracket) or 18-001-962 (Ported Wall Bracket) to secure the regulator in tight spaces. Ensure the outlet is set within 0.4–10 bar using the T-bar adjustment, and verify compatibility with service kits R22-KIT or R22-100R for periodic maintenance.
Yes. The unit is designed for demanding environments and is NACE MR-0175 compliant with Lloyd's Register type approval, making it suitable for offshore installations and chemical processing where corrosion resistance and certified qualification are critical.
Check that your system uses standard 1/2" PTF inlet and 1/4" PTF gauge connections. Confirm the R22 family fit, and plan for service kits such as R22-KIT or R22-100R to simplify ongoing maintenance. Utilize mounting accessories 18-001-959 or 18-001-962 to align with available space and existing brackets.
R22 service kits (R22-KIT, R22-100R) are available to support preventive maintenance, parts replacement, and calibration. Regular checks should verify the setpoint in the 0.4–10 bar range, inspect elastomers and seals, and monitor for any signs of corrosion or leakage, leveraging the regulator’s non-relieving design to minimize loss.
With a flow rating of 50 dm3/s (106 scfm), the R22-405-NNMA maintains stable pressure control under heavy demand while preserving fast response. The stainless steel construction resists corrosion in harsh environments, and the wide -20 to 80 °C operating range ensures reliable operation across diverse climates and industrial settings.