639677 - ESAB Oxygen Check Valve Assembly - Male Connection

Reliable Reverse Flow Prevention

The ESAB 639677 Oxygen Check Valve Assembly is a critical safety component designed for professional oxy-fuel cutting and welding systems. This device functions as a non-return valve, specifically engineered to allow the flow of oxygen in only one direction—towards the torch—while automatically closing to prevent backflow. Reverse flow can occur due to clogged tips, empty cylinders, or improper pressure settings, leading to dangerous mixed-gas conditions in hoses or regulators. This assembly ensures that such conditions are mitigated at the source.

Constructed from high-quality brass, this check valve offers superior durability and resistance to corrosion, essential for harsh industrial environments. The unit features a male connection with standard right-hand threads, adhering to industry safety standards for oxygen equipment to prevent cross-connection with fuel gas lines. The internal spring-loaded mechanism is calibrated to open at the correct cracking pressure, ensuring minimal flow restriction during operation while maintaining a tight seal against back pressure.

Installation of check valves is a recommended practice by safety organizations worldwide. The ESAB 639677 is designed for easy integration into existing setups, providing peace of mind without compromising equipment performance. Whether used in heavy fabrication, scrap cutting, or maintenance repair operations, this valve is an indispensable part of a compliant and safe gas distribution system.