Control directional flow and prevent back flow with our reliable check valves. If your back-pressure exceeds the forward media pressure, the poppet will close preventing flow in the reverse direction.
When choosing a check valve consider there typically are two closure types: Poppet and Lift Check Valves.
Poppet Check Valves
These are sometimes referred to as spring-and-poppet valves and they are a variation of ball check valves. As with ball check valves, the poppet of a poppet valve is held in place by a spring. When the cracking pressure of a poppet valve is reached, the spring compresses, pushing the poppet back from an O-ring located at the inlet allowing fluid to pass straight through the valve.
Lift Check Valves
These are simply a variation of a poppet valve. Instead of having a fully linear flow, the fluid is redirected into a chamber perpendicular to the main flow. The chamber is sealed by a poppet, which is closed by gravity rather than the force of a spring. Lift valves are best suited to applications that do not require complete cessation of flow.
Our primary poppet valve lines include the C, CA, CH, CP, and CPA series which can withstand working pressures as high as 6,000 psig and temperatures ranging from -50 degrees F to 400 degrees F. Cracking pressures range from 1/3 to 600 psi, flow coefficients range from 0.10 to 4.7, and size ranges from 0.125 in. to 1 in.
Our other lines include the IPT-series, the 50-series, the CHP-series UHP valves, and CW-series, an all-welded, high-purity line.
Swagelok products and assembly work are backed by our Limited Lifetime Warranty.