Bosch Rexroth R900923971 & R900972458 Hydraulic Valve

Bosch Rexroth R900923971 and R900972458 are 4-way, 2-position hydraulic directional spool valves in the 4WEH family, engineered to route hydraulic flow in industrial systems and control actuators. Each model is a solenoid-actuated variant, with the part numbers R900923971 (4WEH16E7X/6EG24N9ETK4/B10) and R900972458 (4WEH16J7X/6EG24N9K4/B10). They share a size-16 (4WEH16) footprint and are intended for use in hydraulic circuits where directional control of pressure and return lines is required. In operation, they switch flow between the valve ports to extend or retract actuators, or to redirect fluid within a circuit under electrical control via the solenoid coils. The two variants differ in coil/manifold coding (E7X vs J7X and N9 vs K4) while retaining the B10 end-cap designation used in Rexroth's cataloging. These valves are commonly employed in industrial hydraulic systems and machine tools where reliable, compact directional control is needed, and they can be incorporated into larger valve manifolds or systems that follow Rexroth's cavity and mounting conventions.