4WRH 16 E100-7X/J/V R900952488 Bosch Rexroth Proportional directional valve

Externally pilot-operated proportional directional valves Types 4WRH… and 5WRH.52… Valves of type 4WRH... are pilot-operated proportional directional valves for external actuation via pressure control valves. Set-up: The valve basically consists of: Main valve (10) with main control spool (11) and centering spring (12) Diversion plate (16) Function: The diversion plate (16) connects control port A to the pressure chamber (13) with port Y and control port B with port X. If port X is pressurized, the main control spool (11) is moved to the right (P to B and A to T). If port Y is pressurized, the main control spool is moved to the left (P to A and B to T). The pilot pressure at the main valve must not exceed 25 bar (16 bar with NG52)! Notice: Due to the design principle, internal leakage which may increase over the life cycle is inherent to the valves.