Swagelok SS-4CA-3 Adjustable Inline Relief Valve

The Swagelok SS-4CA-3 is an inline stainless steel poppet check valve in the CA Series with an adjustable cracking pressure, designed to prevent backflow in 1/4 inch Swagelok tube fittings. Constructed from 316 stainless steel, the valve uses a poppet mechanism to open only when the upstream pressure exceeds the set cracking pressure, which for this model ranges from 3 to 50 psi (0.21 to 3.5 bar). The SS-4CA-3 is specified for inline service, with end connections of 1/4 in Swagelok tube fittings, making it compatible with standard Swagelok tubing assemblies and CA-series hardware. Ideal applications include protecting downstream instrumentation, sampling lines, and fittings from backflow in low-pressure gas or liquid systems where precise, adjustable backflow control is required.