Pressure Check Valve
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Introduction
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Pressure check valves enable the regulation of system pressure to adjust the force on a hydraulic piston rod or the torque on a hydraulic motor shaft. Pressure relief valves are used to set the maximum pressure in the circuit and protect it from overloading. Pressure reducing valves permanently maintain the output pressure at the set value while protecting http://www.yikde.com/orbital-h....ydraulic-motor/press