4WH6HA5X/5

The 4WH6HA5X/5 valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for use in hydraulic automation where reliable flow direction is required. The unit is direct operated, so the spool shifts under hydraulic input without an intermediate pilot stage, shortening response time. Hydraulic actuation translates line pressure into precise spool movement that starts or stops actuators on command. A nominal size of 6 determines the port geometry for medium-flow circuits, and four ports provide the standard P, T, A, and B flow paths. The internal spool rests in position “a,” and symbol “H” identifies the crossover pattern selected by circuit designers. Its classification as a directional control element defines its role in routing flow rather than throttling it. Installation is handled with subplate mounting that matches the DIN 24340 Form A interface, simplifying manifold construction. An NBR seal set resists common mineral oils and maintains leakage control inside the housing.

The flow gallery accommodates up to 60 l/min, balancing throughput with manageable pressure loss. Ports A, B, and P tolerate working pressures to 315 bar, while the T port is limited to 160 bar to protect the return circuit. A pilot pressure ceiling of 200 bar allows the same unit to be driven by high-pressure logic controls without damaging spool end seals. The valve can cycle 7,200 times per hour, so it suits machines that demand rapid, repeated positioning. This switching frequency teams with direct operation to minimize hysteresis during closed-loop motion tasks. Oil cleanliness must meet ISO 4406 class 20/18/15 to avoid silting of the metering lands, preserving accuracy and extending service life. The rated flow capacity pairs with the nominal size to prevent excessive pressure drop in continuous duty, and the pressure ratings enable safe integration with modern high-pressure hydraulic power units.