11P63 - 3/4 Inch NPT 20 PSI Safety Relief Valve

Protect Your Shop and Equipment

Safety is the number one priority in any welding shop, and that extends beyond just helmets and gloves—it includes your gas delivery system. The ESAB 11P63 Relief Valve is a small but mighty guardian for your shop's gas lines. Set to open at 20 PSI, this valve prevents dangerous pressure build-ups that can occur due to regulator failure or thermal expansion in the lines. If the pressure in your system creeps past the safe limit of 20 PSI, this valve automatically pops open to release the excess gas, preventing blown hoses, damaged gauges, or worse.

Installation is straightforward thanks to the standard 3/4-inch NPT threading. This is a common size for many shop manifolds and distribution pipes, meaning you can likely thread this directly into your existing setup without hunting for obscure adapters. The brass construction is tough enough to handle the shop environment, resisting rust and standing up to the occasional bump or knock. It's a "set it and forget it" piece of equipment that works silently in the background to keep your operation running safely.

Why is a 20 PSI rating important? Many low-pressure gas systems and specific welding applications rely on consistent, low-pressure delivery. A spike in pressure can disrupt your shielding gas flow, leading to weld porosity or unstable arcs. By capping the pressure at 20 PSI, this relief valve not only protects your hardware but helps maintain the consistency of your gas delivery, contributing to better weld quality. It acts as a fuse for your gas system—sacrificing nothing but venting a little gas to save your expensive regulators and flowmeters.

Don't leave your gas manifold unprotected. Whether you are setting up a new bulk gas system or upgrading an old station, adding a reliable relief valve like the ESAB 11P63 is a smart investment in shop safety. It gives you the peace of mind to focus on laying perfect beads, knowing that your gas supply pressure is being mechanically monitored and controlled 24/7.