IMI Norgren S/523 Heavy-Duty Non-Return Valve - G3/4 Port
Part Number: S/523
Quick Summary
Norgren S/523 heavy-duty non-return valve provides reliable one-way flow for compressed air systems. It addresses common leakage and downtime by using a simple, robust design that maintains consistent backflow control. Constructed with a brass body and nitrile elastomer seals, it handles demanding environments, while a wide operating range of -20 to 80 °C and 0.3 to 16 bar supports diverse applications. Designed to fit within the S/520 Series and Martonair lineage, it helps manufacturers reduce maintenance costs while improving system uptime and automation reliability. User teams appreciate compatibility with standard G3/4 fittings, straightforward installation, and access to a spares kit to minimize downtime. In summary, the S/523 blends reliability, serviceability, and industrial-grade construction for automated production lines and pneumatic OEMs.
Product Information
Extended Description
S/523 Norgren: Allows free flow in one direction only | Simple reliable design | High operating pressure and temperature | Spares kit available
Medium
Compressed air
Operating Temperature
-20 ... 80 °C, -4 ... 176 °F
Operating Pressure
0.3 ... 16 bar, 4 ... 232 psi
Port Size
G3/4
Materials - Body
Brass
Materials - Elastomers
Nitrile rubber
Dimensions - Height
36 mm
Dimensions - Length
36 mm
Dimensions - Width
92 mm
Weight
0.55 kg
Country of Origin
China
Range
S/520 Series
Series
Martonair
Brand
IMI Norgren
The S/523’s heavy-duty non-return design ensures one-way flow, preventing backflow that could damage compressors or downstream actuators. This directly reduces leakage, backpressure issues, and system contamination, translating into lower maintenance costs and more predictable performance in automated lines. In practical terms, it suits pneumatic circuits in manufacturing and packaging equipment where reliable backflow control is essential. With a G3/4 port, installation is straightforward on standard manifolds and hoses, minimizing retrofit time and reducing the risk of incorrect fittings. The brass body and nitrile elastomer seals resist corrosion and oil exposure, supporting long service life and reduced part replacements. The valve handles high operating pressure and temperature, 0.3 to 16 bar and -20 to 80 °C, enabling operation in harsh production lines and centralized plant air systems. A spare parts kit is available, enabling rapid field servicing and minimizing downtime during maintenance windows. Aligning with the S/520 Series lineage and Martonair branding, the S/523 simplifies procurement and OEM integration across a family of components, helping maintenance teams standardize parts and reduce inventory complexity. This combination delivers improved uptime, lower total cost of ownership, and enhanced reliability for automated manufacturing, pneumatic systems, and industrial automation equipment.
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FAQs
Install with standard G3/4 fittings and ensure correct direction of flow as indicated by the valve orientation. Use compatible manifolds or hoses and follow mounting guidelines to avoid leakage and vibration. Verify operating pressure remains within 0.3–16 bar and temperature within -20 to 80 °C for best performance.
Key specs include port size G3/4, brass body, nitrile elastomer seals, operating temperature -20 to 80 °C, operating pressure 0.3 to 16 bar, and weight around 0.55 kg. It is designed for heavy-duty, high-reliability backflow protection in compressed air systems.
Yes. Its one-way flow, robust materials (brass body, nitrile seals), and broad operating range make it suitable for automated pneumatic circuits in manufacturing and packaging environments, with reduced risk of backflow-related faults.
The provided data does not explicitly list certifications such as CE or IP ratings. The valve uses industrially common materials and is designed for general automation environments, so verify your specific regulatory requirements and system standards during integration.
A spares kit is available to simplify field servicing, reducing downtime. The brass body and nitrile elastomer seals offer durability in harsh environments, and standard port compatibility with G3/4 fittings supports quick replacements and streamlined maintenance.