Check Valves: Reliable Solutions You Can Count On

What Are Check Valves

Check valves serve as self-activating safety valves that permit gasses and liquids to flow in a single direction in order to preserve the integrity and function of an overall fluid control system. Check valves are often found protecting pumps in liquid-based systems, as well as compressors in gas systems where sudden back flow may cause the workflow to shut down.


The primary purpose of check valves is to prevent product back flow, which can damage equipment or disrupt production. As such, check valves are commonly used as a backup in case of pump failure, to help compressors and reciprocating pumps function efficiently, and to help moderate system pressure. These applications make them a valuable asset for the refining, petrochemical, oil & gas, and other related industries.

Pressure Check Valves At Hy-Lok

Hy-Lok’s inventory includes a wide range of check valves available in many different sizes and cracking pressures. Our mechanical check valves can handle up to 6,000 psi and temperatures up to 600°F.

We maintain a large inventory of instrument check valves, including welded check valves, compact check valves, poppet check valves, high-pressure check valves, and adjustable check valves. End connection options include male / female NPT, Hy-Lok tube fittings, and metal gasket & O-ring face seals. Hy-Lok check valves are made with stainless steel, brass, and alloy 400.

About Hy-Lok Canada

Since 1977, Hy-Lok has taken pride in producing components that uphold the highest of standards and performance capacity for fluid control systems. We seek to consistently improve upon our designs and to craft products that evolve alongside the demands of various applications, as well as current safety standards. To ensure our products are up to the tasks demanded of them, Hy-Lok Canada maintains a long list of domestic and international certifications and thoroughly tests components before they leave our factory.

Hy-Lok distributors maintain reliable access to our broad range of products. Our inventory includes a comprehensive selection of valves (including high and standard pressure check valves), fittings, and package solutions, each of which are suitable for a variety of different applications.

Learn more about our check valves by contacting Hy-Lok today.