Check ValvesCheck valves are poppet style elements that allow free flow in one direction while preventing flow in the reverse direction. They can be used to isolate portions of a hydraulic circuit or to provide a free flow path around a restrictive valve.
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P.O. Check ValvesPilot operated check valves (also referred to as P.O. check valves), are check valves which can be opened by an external pilot pressure. Thus, P.O. checks, block flow in one direction, like standard check valves, but can be released once an adequate pilot pressure is applied. Free flow is allowed in the reverse direction. P.O. checks are often used to positively lock a dual acting cylinder. There are two types of pilot operated check valves; threaded cartridge style and pilot piston style. These valves work best when used in conjunction with a control valve that vents the valve ports to tank when centered.
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Shuttle ValvesShuttle valves accept pressures from two different sources and divert the highest pressure to a single outlet port. Shuttle valves are commonly used in load sense circuits and hydraulic brake applications. Parker offers some threaded cartridge style shuttle valves as well as in-line style valves.
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Line Cards |
Check & Shuttle Valves - Threaded Cartridge |
