Follow The Lee Company
Check valves provide one-way gas or liquid flow, which is a critical application for propulsion systems. As such, launch vehicles typically incorporate hundreds of Lee Check® Check Valves.
Where the space industry is concerned, The Lee Company has adapted a wide range of check valves to incorporate various elastomeric and polymeric valve seats compatible with commonly required fluids. Our valve seats eliminate leakage across the wide temperature and pressure ranges required of liquids traveling from cryogenic storage to combustion in a rocket engine.
Lee Cheks are available in many configurations for every conceivable spacecraft application. Choose from different flow rates, packaging requirements, operating temperatures and pressures, and allowable leakage.
For best practices and decision support when selecting a check valve, download our eBook, An Engineer’s Guide to Selecting a Check Valve, which provides an unbiased look at different varieties of check valves, decision-making factors, common trade-offs, and common failure modes to be aware of.
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.
When it comes to saving size and weight, Lee Chek® check valves start at just 3/32 of an inch in diameter and under 1/3 of an inch long. Learn more about our products and our history in space with the resources below.
Always verify flow calculations by experiment.
*There are many parameters to consider when determining V-Factor. Click here for more information.
