The downhole oil tool industry lives and dies in compact environments. The critical products that operate oil wells must rely on miniature components that can withstand ferocious temperatures and pressures – products like those built by The Lee Company.
The Lee Chek® check valve product line starts with a valve just 0.093 of an inch in diameter and 0.333 of an inch in length. Despite their size, these robust valves are proven to guarantee reliable performance over the life of an oil well. They can withstand challenging environments for a long cycle life and still have consistent, repeatable, reliable performance.
Our product line encompasses variants for nearly every oil tool application, including a NACE-compliant version made from MP35N, which resists pressures up to 15,000 psi. Choose from ball-style or poppet-style sealing elements, axial or side-exit flow paths, metal or elastomeric seats, and insert or cartridge style bodies.
In addition to our wide range of available catalog items, over half of the products we supply are designed for the unique needs of a specific application. Check valves can be created in custom envelopes and configurations with unique cracking pressures, flow rates, leakage specifications, materials, and more. Contact your local Lee Sales Engineer to find the best solution to your problem, working engineer to engineer.
For comprehensive information regarding check valves, 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.
If you need a check valve that can withstand corrosive fluids, working pressures up to 15,000 psi, and operating temperatures up to 400°F, The Lee Company offers a solution to fit your needs. These valves are constructed of NACE-compliant materials and are available in five diameters ranging from 0.125 to 0.500 of an inch. Custom versions are also available with multiple polymeric valve seat material options to achieve zero leakage in the checked direction under extreme hot or cold temperatures.
Our most economical design, these simple check valves provide flow around a 440C ball which forms the sealing element.
Axial style ball check valves are designed for 3000 psi systems and are available in 0.187 and 0.250 inch diameter envelopes, screened and unscreened, and in 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 in package sizes ranging from 0.093 to 0.343 of an inch.
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.
Lee Zero Leak Cheks feature an elastomeric seat 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 0.187, 0.250, 0.375, and 0.500 inch diameters.
Our line-up of poppet-style check valves offers an exceptionally high flow capacity for their size compared to ball-style valves and includes our Lo-Lohm Cheks, Hi-Q Cheks, and High Pressure Cheks. The High Pressure Chek starts at a micro-miniature 0.125 inch diameter yet still withstands up to 8000 psi. It’s also available as a NACE-compliant version made from MP35N, which can check pressures up to 15,000 psid.
Meanwhile, the Hi-Q Chek offers the greatest feasible flow capacity for valves of this size. Available in sizes up to 1 inch in diameter in a cartridge configuration, the Hi-Q Chek valve can flow over 57 GPM with only a 100 psid pressure drop. Finally, the 0.250 inch Lo-Lohm Chek offers 3.5 times more flow than an axial flow ball-style check valve of the same diameter.
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.
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 the oil and gas industry to learn more.