Bosch Rexroth | 4WEH22D7X6EG24N9K4B10D3
4WEH22D7X/6EG24N9K4/B10D3
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The 4WEH22D7X/6EG24N9K4/B10D3 valve belongs to Bosch Rexroth’s WEH Directional Spool Valves series and directs hydraulic flow in automated machinery. It employs electro-hydraulic actuation to shift a NG25, 4-way spool, so main line flow can be routed between ports P, A, and B under command. The valve provides two spool positions arranged according to spool symbol D, giving a defined open and closed circuit for cylinder or motor ports. A pilot control valve labeled 6E moves the spool once the pilot circuit reaches at least 11 bar, which is the minimum pilot pressure for the spring-centered configuration. Hydraulic lines are mated to the body through the ISO 4401-08-08-0-05 porting pattern, ensuring interchange with standard subplates. This configuration supports system design where a 280 bar operating pressure is required at the work ports while internal passages remain sized for the specified frame.
The solenoid pilot is powered by a 24 V DC coil that connects through a DIN EN 175301-803 K4 plug, allowing quick wiring in control cabinets. A concealed manual override marked N9 permits local shifting when electrical power is absent without exposing moving parts. The pilot stage is protected by a throttle insert with a 1.0 mm orifice, designated B10, to moderate flow surges during actuation. The main stage tolerates up to 210 bar on the pilot supply and integrates a D3 pressure reducing valve to stabilize the pilot line under varying system pressure. Internal cleanliness must be maintained to ISO 4406 class 20/18/15 or better to avoid spool binding and seal wear. Together these features create a directional valve that withstands full rated pressure while allowing reliable electro-hydraulic switching in mobile or industrial power units.
Technical Specifications
Actuation
Electro-Hydraulic
Cleanliness Class
ISO 4406 (20/18/15)
Coil Voltage
24 V DC
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (2-pos, Spring)
11 bar
Pilot Control Valve
6E
Porting Pattern
ISO 4401-08-08-0-05
Pressure Reducing Valve
D3
Spool Positions
2
Spool Symbol
D
Throttle Insert
Ø 1.0 mm (B10)
Valve Size
NG25
Way Configuration
4-Way
1620 Old Apex Road
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