H-4WEH10HD4X/6EW110N9ETK4/B10D3

The H-4WEH10HD4X/6EW110N9ETK4/B10D3 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and serves as an electro-hydraulic pilot-operated element for routing pressure flow in automated circuits. It uses electro-hydraulic actuation to shift its spool, allowing electrical signals to command hydraulic movement without mechanical linkages. The unit is built in valve size NG10 so it fits systems that require a medium flow path. Its D-coded spool provides the flow configuration, and the component has two hydraulic end positions that define the selectable flow states. A hydraulic spool return recenters the element when the pilot signal is removed, while a concealed manual override lets maintenance staff reposition the spool when power is unavailable. Pilot oil is taken internally from port P and returned internally to port T, which removes the need for external pilot lines. Reliable shifting begins at a pilot pressure of 7 bar, and each switch displaces 4.08 cm³ of pilot oil to move the spool.

Flow capacity of the valve reaches 160 l/min, supporting large actuators without excessive pressure drop. The main ports P, A, and B are rated for a maximum operating pressure of 350 bar, while the pilot stage can accept up to 250 bar, providing a wide safety margin between control and power passages. A secondary pressure reducing valve limits pilot pressure to 45 bar downstream, protecting the solenoid operator from overload. The component mounts on subplates that follow the ISO 4401-05-05-0-05 pattern so installation aligns with common manifold layouts. NBR seals are used throughout the housing to maintain compatibility with standard mineral hydraulic oils and to contain pressure at all rated values. With this flow and pressure capability, the spool unit can drive cylinders quickly and hold them firmly in position during dwell phases used in industrial presses, plastic injection molds, or test rigs where repeatable motion and sealing integrity are critical.