639717 - ESAB CV5 Oxygen Check Valve Assembly 3/4 x 1/2 NPT

Protect Your Shop with Reliable Gas Safety

When it comes to setting up a professional gas manifold or station drop, safety is the number one priority. The ESAB 639717 Check Valve Assembly (Model CV5) is built to keep your oxygen and inert gas lines flowing in the right direction—and only the right direction. Backflow, where gas pushes back up the line, can lead to dangerous gas mixing and equipment damage. This heavy-duty brass check valve acts as a one-way street for your gas, automatically closing if pressure reverses, giving you peace of mind while you work.

Built for Heavy-Duty Systems

Unlike small torch-mount valves, this unit is designed for the big jobs. It features rugged NPT (National Pipe Thread) connections sized at 3/4-inch by 1/2-inch, making it perfect for threading directly into your shop's piping system or heavy-duty regulator setups. The solid brass body stands up to the wear and tear of daily industrial use, resisting rust and taking the knocks of a busy workshop environment without failing.

Easy Identification and Installation

Safety equipment should never be confusing. This valve comes with Right-Hand (RH) threads, the universal standard for Oxygen and Inert gases, ensuring you never accidentally install it on a fuel line. Whether you are upgrading an old manifold or building a new distribution system for your welding stations, the ESAB CV5 is a straightforward, reliable solution. Simply apply the appropriate thread sealant for oxygen service, tighten it into place, and trust in the quality of ESAB/Victor engineering to keep your operation running safely.