A constant, pressure compensated flow rate is established from E to R, while a minimum pressure differential of appr. 5 bar (70 psi) exists between the two ports. Input flow supplied to E in excess of the regulated output at R is by-passed to T.
Its pressure is controlled by a relief cartridge which will dump to Tank the output flow if the maximum pressure is reached. A normally-open solenoid cartridge by-passes all Inlet flow to tank when de-energized. Reverse flow from R to E is limited by the selected opening of the restrictor and is not pressure compensated. Flow from T to R is not permitted.
T must not present any back-pressure, but go directly to tank for correct operation. Only used to test the functions, like new, perfectly working. Includes 12v DC solenoid and electric plug socket.