4WEH22D7X/6EG24N9ETDAL/B10

The 4WEH22D7X/6EG24N9ETDAL/B10 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and directs pressurized fluid in automated hydraulic circuits. Its 4-way configuration provides four flow paths so actuators can extend, retract, or hold position as commanded. The valve uses size 25 (code W.H 22) mounting dimensions to transmit high flow rates without excessive pressure loss. Electro-hydraulic actuation lets an electrical signal energize a pilot stage that hydraulically shifts the main spool, enabling remote control. A high-power 6E pilot valve supplies the shift force needed for rapid response under load. The pilot solenoid operates on 24 V DC, simplifying connection to standard machine control voltage. Internal pilot oil supply, identified as code E, feeds the pilot stage directly from the pressure port, removing the need for an external line. Internal pilot oil return, tagged T, channels pilot flow back to the tank passage within the body, keeping external plumbing minimal. The ISO 4401-08-08-0-05 porting pattern matches common subplates for straightforward installation. A D-coded spool defines the specific crossover and center positions expected by system designers.

The main ports p, A, and B withstand operating pressures up to 280 bar, allowing the valve to function in high-pressure systems. Pilot passages accept pressures up to 210 bar, yet the spool will begin to shift once at least 11 bar is present, giving a clear operating window. Return springs center the main spool when pilot pressure is removed, ensuring the default position is consistently restored. A concealed N9 manual override lets technicians move the spool mechanically during commissioning or power loss without exposing protruding levers. The built-in Ø 1.0 mm throttle insert, designated B10, limits pilot flow to dampen shifting speed and reduce shock. Fluid cleanliness must meet ISO 4406 (c) 20/18/15, so filtration is required to maintain reliable operation. Collectively, these pressure limits, mechanical features, and contamination controls enable the valve to manage demanding motion cycles in automated hydraulic machinery.