CV-20R - Oxygen Torch Check Valve - B-Size Right Hand

Technical Overview of the CV-20R Oxygen Check Valve

The Uniweld CV-20R is a precision-engineered reverse flow check valve designed specifically for oxygen service in oxy-fuel cutting and welding applications. This safety device is critical for preventing the accidental backflow of gases, a condition that can lead to dangerous gas mixtures forming in the hoses or regulators. The valve is constructed from high-quality brass, ensuring resistance to oxidation and mechanical wear in industrial environments.

The CV-20R features standard "B" Size (9/16"-18) Right Hand (RH) threads, making it compatible with the vast majority of industrial cutting torches and welding handles in North America. It is designed to be installed at the torch inlet, providing a line of defense as close to the point of operation as possible. The internal mechanism utilizes a spring-loaded valve seat that opens under normal flow pressure but instantly seals if back-pressure is detected, effectively blocking reverse flow.

Specifications and Compliance

Engineered to meet strict industry safety standards, this check valve offers low flow restriction while maintaining a reliable seal against backflow. It is distinct from a flashback arrestor; while it stops gas reversal, it does not extinguish a flame front. For complete protection, it is often recommended to use check valves in conjunction with flashback arrestors, although many modern safety setups prioritize check valves at the torch and arrestors at the regulator depending on the specific safety protocol.

Installation and Maintenance

Installation is straightforward: the valve screws directly onto the oxygen inlet of the torch handle. The hose then connects to the inlet side of the check valve. Users must ensure the flow direction arrow on the valve body points towards the torch. Regular testing of check valves is recommended to ensure the internal spring and seat are functioning correctly and have not been fouled by debris.