Lee Chek® check valves are available in many configurations for a wide range of applications. Many are used in the power generation industry for applications such as purging air, injecting water, or controlling fuel flow in liquid or natural gas industrial gas turbines. Choose from ball-style or poppet-style sealing elements, axial or side-exit flow paths, metal, polymeric, or elastomeric seats, and insert or cartridge-style bodies. These options will allow you to optimize your design for different flow rates, packaging requirements, pressure differentials, and allowable leakage.
The Lee Company has developed a family of check valves specifically for power generation applications.. The valves are rated for temperatures up to 450°F, allow zero leakage, and are serviceable during maintenance with replacement subcomponents available. This reduces downtime for industrial gas turbines.
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, which provides an unbiased look at different valve configurations, critical performance characteristics, design challenges, trade-offs, and common failure modes to be aware of.
The Lee Company offers a check valve design made specifically for the requirements of the power generation industry. This field-proven component can be used in purge air, water injection, and liquid fuel applications. Featuring a stainless steel poppet and a polyimide seat, this component is capable of providing high flow with extremely low leakage. It can also operate at temperatures up to 450°F. Lastly and perhaps most importantly, the power generation check valve can be disassembled and serviced in the field using a rebuild kit, which helps to minimize downtime. Make use of the HI-BAR® Safety Screen Filter (which is both removable and washable) to extend time between maintenance cycles.
Our most economical designs, 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.
Our line-up of poppet-style check valves offers 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. 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 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.
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.
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 direction that is normally blocked. 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 specific to the power generation industry to learn more.