Bosch Rexroth | 4WEH22H7X6EW110N9ETSDALB10P4-5
4WEH22H7X/6EW110N9ETSDAL/B10P4 5
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The 4WEH22H7X/6EW110N9ETSDAL/B10P4 5 directional spool valve belongs to the WEH Directional Spool Valves series from Bosch Rexroth and is used to route pressurized fluid in automated hydraulic circuits. Electro-hydraulic actuation converts an electrical command into pilot oil flow so the main spool can shift under fluid force rather than direct solenoid effort. The valve is built in NG25 size, giving it flow capacity suited to medium-frame power units. A 4-way configuration offers one pressure port, a tank port, and two work ports to control cylinders in both directions. The ISO 4401-08-08-0-05 porting pattern aligns with standard subplates, simplifying manifold integration. A High-Power 6E pilot valve delivers the pilot flow needed for rapid spool movement, while internal pilot oil supply removes the need for an external pressure line. Internal pilot oil return channels the exhausted pilot fluid back through the body, reducing external hoses, and hydraulic main spool return brings the spool to its neutral position when the command is removed. A concealed manual override lets maintenance personnel shift the spool locally without exposing moving parts.
The valve handles operating pressures up to 350 bar at ports p, A, and B, supporting high-force actuators, while port Y can accept internal pressures to 160 bar before drainage is required. A preload cracking pressure of 4.5 bar keeps the pilot stage closed until a deliberate command is present, preventing unintended shifts. Supply-side switching time adjustment lets technicians fine-tune response speed to match machine requirements, and a 1.0 mm throttle insert orifice can further meter pilot flow for smoother transitions. Installation uses six M12 × 60 screws conforming to ISO 4762, and each screw must be tightened to 100 Nm to secure the valve without distortion. These mounting details ensure the body seals properly against the subplate and resists load-induced vibration.
Technical Specifications
Actuation Type
Electro-Hydraulic
Main Spool Return
Hydraulic
Manual Override
Concealed
Max Operating Pressure (p, A, B)
350 bar
Max Pressure Port Y Internal (ac)
160 bar
Mounting Screw Torque
100 Nm
Mounting Screws
6x M12 x 60 (ISO 4762)
Pilot Oil Return
Internal
Pilot Oil Supply
Internal
Pilot Valve Type
High-Power 6E
Porting Pattern
ISO 4401-08-08-0-05
Preload Valve Cracking Pressure
4.5 bar
Size
NG25 (W.H 22)
Switching Time Adjustment
Supply Control
Throttle Insert Orifice
1.0 mm
Valve Way Configuration
4-Way
1620 Old Apex Road
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