F12-030 Hydraulic Axial piston fixed motors_Parker High voltage high speed motor
Fan motor circuit Because of the built-in anti cavitation valve, either left hand (L) or right hand (R) rotation must be specified when ordering the motor. When the pump flow to the motor is shut off and the motor is operating at very high speeds, it is important that sufficient return port back pressure is available (port B in the schematic to the right). The anti cavitation valve will then open and direct flow to the motor inlet port. If the inlet pressure is insufficient, motor cavitation will be experienced. In an open circuit, back pressure can be created by a counter pressure valve installed in the return line; preferably, it should be pilot operated to minimize power losses. A back pressure of about 10 bar is sufficient in most applications. For more info about integrated pressure relief valves, see page 79.