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CV & KA Series Pneumatic Check Valves CV & KA Series Pneumatic Check Valves CV & KA Series Pneumatic Check Valves

CV & KA Series Pneumatic Check Valves

  • Professional CV standard and KA high-flow check valves
  • Reliable one-way (non-return) pneumatic flow control
  • High-precision backflow prevention for air and vacuum systems
  • CV series: durable brass body for standard industrial use
  • KA series: high-flow aluminum body for large-scale automation
  • Low cracking pressure for energy-efficient operation
  • Zero-leakage performance with premium NBR/Viton seals
  • Port sizes available: 1/8", 1/4", 3/8", 1/2", 3/4", 1"
  • Compact inline design for easy installation
  • Reliable performance in high-cycle industrial environments

CV & KA Series: Essential Backflow Prevention for Industrial Pneumatics


Our range of pneumatic check valves, including the CV Standard and KA High-Flow series, provides critical one-way flow control for compressed air systems. Also known as non-return valves, these components allow air to flow freely in the direction of the arrow while instantly blocking flow in the opposite direction. They are vital for protecting compressors, vacuum systems, and sensitive actuators from pressure surges and fluid reversal.

Series Overview & Selection Guide

  • CV Series (Standard Inline Type): The CV series is the universal choice for standard pneumatic circuits. Featuring a compact, threaded inline design and a durable brass body, it offers a perfect balance of reliability and affordability. It is ideal for general air-line protection and small-to-medium actuators.

  • KA Series (High-Flow Performance): Engineered for applications requiring maximum air volume, the KA series features a streamlined internal structure to minimize pressure drop. The robust aluminum alloy body and larger internal orifice make it the preferred choice for large-bore cylinders and high-speed automated systems where flow bottlenecks must be avoided.

Key Technical Features & Engineering Highlights

  • Reliable One-Way Sealing: Equipped with high-sensitivity internal spring-loaded poppets that ensure a bubble-tight seal the moment flow reverses.

  • Low Cracking Pressure: Optimized internal geometry allows the valves to open at minimal pressures (starting from 0.02 MPa), ensuring maximum system efficiency.

  • Durable Industrial Materials:

    • CV: Heavy-duty brass body for superior wear resistance.

    • KA: High-strength anodized aluminum for a lightweight yet rugged profile.

  • Premium Seals: Utilizes high-grade NBR or Viton (FKM) seals for zero-leakage performance and long service life across various temperatures.

  • Versatile Thread Standards: Available in G, PT, and NPT thread configurations to ensure compatibility with global industrial piping systems.

Technical Specifications Overview

FeatureDetails (CV Series)Details (KA Series)
Body MaterialIndustrial BrassAnodized Aluminum Alloy
Acting TypeOne-Way (Non-Return)One-Way (High-Flow)
FluidClean Air (40-micron filtered)Clean Air (40-micron filtered)
Operating Pressure0.05 ~ 1.0 MPa0.05 ~ 1.0 MPa
Cracking Pressure< 0.02 MPa (0.3 psi)< 0.03 MPa (0.4 psi)
Temperature Range-5°C to +60°C-5°C to +60°C
Available Sizes1/8", 1/4", 3/8", 1/2"1/8", 1/4", 3/8", 1/2", 3/4", 1"

Primary Industrial Applications

The CV and KA check valves are the go-to solution for:

  • Air Compressor Systems: Preventing reservoir tank pressure from returning to the pump.

  • Vacuum Handling: Maintaining vacuum levels in suction cups when power is disconnected.

  • Pneumatic Actuators: Preventing unintended cylinder retraction during pressure drops.

  • F.R.L. Units: Ensuring consistent one-way flow through air preparation stations.



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