4WEH22D7X/6EW110N9ES2DAL/B10

The 4WEH22D7X/6EW110N9ES2DAL/B10 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It directs flow in hydraulic circuits where remote-controlled actuation is required. The unit is built in valve size NG25 so it supports medium-to-high flow rates typical of machinery power stages. A maximum operating pressure of 350 bar allows the spool to shift without leakage in high-pressure circuits. The porting pattern follows ISO 4401-10-09-0-05, enabling drop-in mounting on standardized subplates used in presses and mobile equipment. Pilot shifting is handled by an integrated 4WE6 control valve, which permits electrical solenoids to move the NG25 spool without routing large flow through the operator lines.

For stable pilot operation, the valve accepts pilot pressure up to 210 bar, preventing premature wear of the control stage. When pilot pressure exceeds 210 bar, an internal pressure-reducing valve engages; it limits secondary pressure to 45 bar so the 4WE6 stage receives a consistent supply. A throttle insert with a 1.0 mm diameter is fitted to damp pressure spikes, improving spool positioning during rapid command changes. These features combine to maintain predictable switching in automated hydraulic systems that demand precise flow path selection.