Check Valves

These valves prevent the return flow of gas and thus keep foreign substances out of lines, regulators and cylinders. Spring-loaded design with the spring on the high pressure side protects it too. A positive stop prevents overstressing of the spring by sudden surges of gas pressure. An O-ring at the valve seat provides quick, efficient sealing. The valves have a one-piece body with a 1/4 in. NPT female connection inlet and outlet. It is rated for 3000 psig with a cracking pressure of approximately 1 psig. Spring is stainless steel.