4WEH16U7X/6EG24N9

The 4WEH16U7X/6EG24N9 valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated systems. Its nominal size is NG16, so the housing matches medium-capacity manifolds. A porting pattern of ISO 4401-07-07-0-05 aligns the subplate interface with common industrial blocks, simplifying installation. The valve tolerates a maximum operating pressure of 280 bar at ports P, A, and B, allowing it to control cylinders or motors exposed to high load. Up to 300 l/min can pass through the U-configured flow paths, providing adequate volume for rapid actuator movement. Achieving the fastest shift requires a pilot flow of 35 l/min, while each actuation in the three-position spring-centered version moves 5.72 cm³ of pilot oil, defining the energy needed by the control pilot stage. Electrical actuation relies on a 24 V DC supply, integrating the valve with standard machine control voltage.

The pilot circuit will accept pressures up to 250 bar, so remote pilot lines can be tied to high-pressure branches without added reducers. A minimum of 14 bar is required in that same circuit to overcome the spring force and shift the spool, ensuring predictable response. Port Y, when used as an external drain, is rated for 210 bar to protect the return path from overload. Fluid cleanliness must be maintained at ISO 4406 class 20/18/15 to limit wear on the precision-ground spool lands. Secure attachment to the manifold is achieved with four M10 × 60 screws compliant with ISO 4762, providing the clamping force needed to seal the interface gasket. These mechanical, hydraulic, and contamination limits define reliable service for the valve in automated press, molding, or material-handling circuits.