6271725 - Oxweld Oxygen Regulator Check Valve - Reverse Flow Preventer

Reliable Reverse Flow Protection for Oxy-Fuel Systems

The ESAB Oxweld 6271725 Oxygen Check Valve is a critical safety component designed to prevent the dangerous reverse flow of gases in oxy-fuel welding and cutting systems. Engineered by ESAB, a leader in welding and cutting technologies, this check valve is specifically calibrated for oxygen service. It installs directly onto the regulator outlet, serving as the first line of defense against backflow that could potentially mix gases in the regulator or cylinder, creating hazardous conditions.

Constructed from high-quality brass, the valve body is built to withstand the rigors of industrial environments, resisting corrosion and physical damage. Inside, a precision spring-loaded mechanism remains open during normal flow but shuts instantaneously if downstream pressure exceeds upstream pressure. This immediate response effectively blocks the reverse flow of fuel gas into the oxygen line, a scenario that can lead to equipment damage or safety incidents. The valve features standard B-Size (9/16"-18) Right-Hand threads, ensuring compatibility with the vast majority of industrial oxygen regulators used in North America.

While check valves are essential for preventing the mixing of gases, it is important to note that they do not stop a flashback (a flame front traveling back through the line). For complete protection, this check valve should be used in conjunction with a flashback arrestor. However, as a standalone device for flow direction control, the Oxweld 6271725 offers superior reliability and flow characteristics, ensuring that your torch receives the necessary volume of oxygen without restriction during normal operation. Regular testing and inspection of check valves are recommended to maintain optimal safety standards in any fabrication shop or industrial facility.

Key Technical Specifications

• Gas Service: Oxygen
• Connection Type: Regulator Mount (Male Inlet / Female Outlet)
• Thread Size: 9/16"-18 RH (B-Size)
• Mechanism: Spring-loaded reverse flow prevention