High Flow Check Valves

Lee Etched Safety Screens feature a seamless, one-piece, 304L CRES screen element formed with pleats to greatly increase the dirt carrying capacity of the screen. The result is a robust screen design with an optimum amount of protection in a small package. Lee etched safety screens are offered with several standard hole sizes including 75, 100, 150, 200, 250, 380, and 500 microns. Lee Spring Retained Safety Screens include a flange mount etched safety screen and a retention spring. This combination allows for an inexpensive mounting technique suitable for unidirectional flow. The spring O.D. is slightly larger than the I.D. of the mounting hole and a special tool is used to twist the spring into the hole. Once the tool is removed, the spring holds the screen in place.

Known for their durability, longevity, and small size, Lee bypass valves are designed to shunt flow across an actuator piston when the system pressure is either shut off or lost. They are normally open, with a hydraulically actuated pilot-to-close feature. These stainless steel valves are available in a 0.375 inch diameter insert for system pressures up to 4000 psi, have a maximum restriction of 70 Lohms when fully open, and weigh only 16 grams each. Similar to Lee shuttle valves, Lee bypass valves include a polyimide compression seal to ensure there is no external leakage across the three-port design when properly installed.

The Lee Visco Jet® is one of our most unique innovations. It creates a highly complex fluid passage with a series of individual spin chambers and orifices. This provides an increase in flow passage as great as 25 times that of a corresponding (same Lohm rate) single-stage restrictor, with a corresponding reduction in velocity.

Visco technology offers multiple benefits, including increased resistance to contamination and reduced erosion. Its design prevents cavitation and creates a degree of viscosity compensation. To learn more about how Lee Visco Jet technology works, watch this short video.

Visco Jets are available in flow rates up to 313,000 Lohms in a 0.187 inch diameter cartridge and up to 2.2 million Lohms in a 0.43-inch diameter cartridge. There is no other product available that can provide this level of restriction with such a large minimum passage in such a tiny package.