Does the VNR Brass Non-Return Check Valve support installation in systems operating continuously at 10 bar and 70°C?

Yes. The VNR Brass Non-Return Check Valve supports continuous operation at 10 bar and 70°C, since its rated working pressure range is 2–10 bar and its operating temperature range is −10°C to +70°C. Ensure system compatibility with brass OT58 and NBR sealing (chemical compatibility and media limits) before installation.

Can the VNR Brass Non-Return Check Valve be used with aggressive gases or vapors, or is it limited to air and inert gases?

The VNR Brass Non-Return Check Valve is primarily described for use with air and inert gases. Its construction—brass OT58 body and NBR (nitrile) sealing—provides durability and good sealing for many pneumatic applications, but it imposes limits regarding aggressive gases or vapors. NBR is susceptible to swelling, hardening, or chemical attack when exposed to certain hydrocarbons, ketones, strong acids, chlorinated solvents, and some aggressive vapors. Likewise, brass may corrode or suffer dezincification in the presence of certain aggressive or corrosive media (acidic or ammoniacal environments, halogenated compounds, hydrogen sulfide, etc.). Therefore, VNR Brass Non-Return Check Valve should be considered suitable for air and inert gases and for non-aggressive, compatible gases. For aggressive gases or vapors, or when chemical compatibility is uncertain, select a valve with chemically resistant elastomers (e.g., FKM, EPDM, PTFE) and/or alternative body materials (stainless steel, nickel alloys) and consult material compatibility charts or the manufacturer to confirm safe use.

VNR Brass Non-Return Check Valve

All products, Pneumatic valves/

Additional information

Material	B – brass (bronze)

The VNR series check valve is a reliable solution designed to ensure air flows exclusively in one direction, providing safety and efficiency in pneumatic systems. Engineered to operate within a working pressure range of 2 to 10 bar, it guarantees stable performance even under demanding conditions. With an operating temperature span from -10°C up to +70°C, it adapts seamlessly to diverse industrial environments. The valve body is manufactured from high-quality brass OT58, offering durability, resistance to wear, and long service life. Equipped with NBR sealing, it ensures excellent tightness and protection against leaks, maintaining consistent system performance. Compact, robust, and easy to integrate, the VNR series check valve is the ideal choice for applications requiring dependable airflow control and long-term reliability.

List of product variants

Article number	Product variant name	Nominal inner diameter	Working pressure [bar]	Enquiry	Catalogue
MW-W3601000001	VNR check valve, BSP 1/8"	5	10
MW-W3601000002	VNR check valve, BSP 1/4"	6	10

The VNR series check valve is a reliable solution designed to ensure air flows exclusively in one direction, providing safety and efficiency in pneumatic systems. Engineered to operate within a working pressure range of 2 to 10 bar, it guarantees stable performance even under demanding conditions. With an operating temperature span from -10°C up to +70°C, it adapts seamlessly to diverse industrial environments. The valve body is manufactured from high-quality brass OT58, offering durability, resistance to wear, and long service life. Equipped with NBR sealing, it ensures excellent tightness and protection against leaks, maintaining consistent system performance. Compact, robust, and easy to integrate, the VNR series check valve is the ideal choice for applications requiring dependable airflow control and long-term reliability.