The CV Series Check Valve, also known as a Non-Return Valve, is a compact, high-performance unidirectional valve that allows fluid or air to flow in one direction only, automatically preventing backflow. It plays a crucial role in protecting sensitive equipment, maintaining system pressure, and ensuring the efficiency and safety of pneumatic and hydraulic circuits.

Built with a robust body made of brass, aluminum, or stainless steel, the CV series is available in multiple thread sizes (1/8” to 1”) and supports BSP or NPT connections for compatibility across various global systems. The internal sealing mechanism—using NBR, FKM, or EPDM—ensures leak-proof operation, even under fluctuating temperatures and pressures.

With a low cracking pressure (typically 0.1–0.3 bar), the valve opens smoothly when forward flow pressure is present and closes instantly when reverse pressure is detected, thus protecting compressors, cylinders, actuators, and pipelines from potential damage due to reverse flow.

This valve is ideal for applications in air compressors, vacuum systems, air tanks, pneumatic tools, hydraulic systems, and pump lines where reverse flow can affect performance or damage equipment.

Key Features of Check Valve – CV Series:

One-Way Flow Protection

• ✅ Allows free flow in one direction

• ✅ Instantly blocks reverse flow to protect downstream components

• ✅ Maintains system pressure stability

High-Quality Construction

• ✅ Available in brass, aluminum, or stainless steel for corrosion resistance

• ✅ Rugged body withstands harsh industrial conditions

• ✅ Suitable for use with air, water, oil, and inert gases

Reliable Sealing Mechanism

• ✅ High-grade NBR, EPDM, or FKM seals

• ✅ Leak-proof under low and high pressure conditions

• ✅ Long-lasting performance with minimal wear

⚙️ Low Cracking Pressure

• ✅ Opens at approx. 0.1 to 0.3 bar

• ✅ Ensures quick response and minimal pressure loss

• ✅ Ideal for low-pressure pneumatic circuits

Flexible Installation Options

• ✅ Thread sizes: 1/8", 1/4", 3/8", 1/2", 3/4", 1"

• ✅ Compatible with BSP and NPT threads

• ✅ Mounts in any direction (horizontal or vertical)

Application Areas

• ✅ Air compressors to prevent tank pressure loss

• ✅ Cylinders and actuators to stop reverse movement

• ✅ Pump discharge lines to stop back-siphoning

• ✅ Vacuum and blow-off systems, air dryers, and pressure systems

Why Choose CV Series Check Valve?

• ✔️ Prevents costly reverse flow damage

• ✔️ Compact, durable, and easy to install

• ✔️ Low maintenance and long service life

• ✔️ Compatible with a wide range of fluids and gases

• ✔️ Ideal for both industrial and commercial fluid control setups