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Hy-Lok Check & Relief Valves

As a leading supplier of premium fluid control products throughout the United States, SWPC Fluid Solutions is pleased to offer an extensive line of check and relief valves manufactured by Hy-Lok.

Hy-Lok check valves offer a reliable way to control backflow in high and low-pressure fluid systems. We offer our check valves in your choice of stainless steel, brass, alloy 400, and other materials with end connection options that include male/female NPT, tube fitting, metal gasket, and O-ring face seals.

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hy-lok check & relief valve distributor


Capable of handling pressures up to 10,000 psi at temperatures up to 600°F, we carry a full inventory of configurations to meet your applications.

  • Our 700 series valves feature tight shut-off capabilities thanks to an integrated O-ring.
  • With the 700H series, an O-ring poppet provides a replaceable high integrity seal.
  • We also carry the RV series relief valves, featuring spring adjustable capability over the entire cracking pressure range.
  • Our CVA adjustable line features a one-piece body construction for a wide range of cracking pressures.

All Hy-Lok relief valves feature a compact body for tight space installations, external cracking pressure adjustments, and a lock wire design to maintain relief settings. Like all other Hy-Lok valves, every check and relief valve is tested before it leaves the factory.

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