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Check Valves

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Check Valves for Other Industries

The Smallest, Most Reliable Check Valves Available on the Market

The Lee Company supplies miniature check valves that offer guaranteed performance. These robust valves are proven to exceed requirements in many demanding industries, ensuring reliable performance over the life of your product. They can withstand challenging environments for long cycles and still demonstrate consistent, repeatable, reliable performance.

Lee check valves are available in many configurations for every conceivable application. Choose from ball-style or poppet-style sealing elements, axial or side-exit flow paths, metal, polymeric, or elastomeric seats, and insert style configurations for installation into metal housings or press-in style for installation into plastics. These options will allow you to optimize your design for different flow rates, packaging requirements, pressure differentials, and allowable leakage.

Over half of the products we offer are designed for the unique needs of a specific application. Check valves can be designed in custom envelopes and configurations with unique cracking pressures, flow rates, leakage specifications, materials, and more. One potential challenge is the instability of the check valve’s components, and we have several solutions to eliminate the problem depending on the exact system conditions. Contact your local Lee Sales Engineer to discuss your specific needs.

For best practices and decision support when selecting a check valve, download our eBook. An Engineer’s Guide to Selecting a Check Valve provides an unbiased look at different valve configurations, critical performance characteristics, design challenges, trade-offs, and common failure modes to be aware of.

Ball-Style Check Valves

In our most economical designs, these simple check valves provide flow around a ball bearing that forms the sealing element.
Axial style ball check valves are designed for 3000 psi systems and are available in a wide range of diameters, envelopes, screened and unscreened, and forward and reverse flow configurations.

Side exit check valves with porting allow the ball to move out of the flow path, creating an increased flow capacity and enhanced silt resistance.

HFS (High Flow Slotted) Lee Chek® check valves offer up to three times the flow capacity and a 5000 psi operating pressure rating in a significantly smaller package that includes 0.156, 0.187, and 0.250 inch diameters.

High Flow Check Valves

Our line-up of poppet-style check valves offers exceptionally high flow capacity for their size compared to ball-style valves. In some cases, the poppet-style valve provides 3.5 times more flow than an axial flow ball-style check valve of the same diameter. They are available in sizes from 0.125 to 1 inch to provide the appropriate flow while remaining stable. It’s also available as a NACE-compliant version made from MP35N, which can be used in systems with pressures up to 15,000 psid.

Zero Leak Check Valves

Lee Zero Leak Cheks feature an elastomeric seal material for applications where eliminating leakage is critical. They utilize a poppet-style, axial flow design with a choice of two different elastomers and are available in a wide range of sizes.

Extreme Environment Check Valves

If you need a check valve that can withstand working pressures up to 15,000 psi and operating temperatures of up to 400°F, The Lee Company offers a solution to fit your needs. These valves are constructed of corrosion-resistant stainless steel. They are available with multiple polymeric valve seat material options to achieve zero leakage in the checked direction under extreme hot or cold temperatures.

Pilot-Operated Check Valves

Lee Pilot-Operated Cheks are pressure piloted to open check valves available in diameters from 0.250 to 0.500 of an inch. When pressure is applied to the pilot port, flow is allowed in the normally blocked direction. While our base version is a poppet-style valve designed for 3000 psi systems, our high-pressure models are designed for system pressures of up to 5000 psi and are available in forward and reverse flow configurations. Custom configurations with zero leak seals are available upon request.

Support & Resources

Support & Resources from a Team that Speaks Your Language

Partner with The Lee Company and get much more than just a supplier of top-quality fluid control products. Our reliable technical support team is available every step of the way to help you find solutions, maximize productivity, and drive efficiency across your operations. Check out these resources tailored to your industry to learn more.