Bosch Rexroth | 4WEH22E7X6EW110N9ETSK4B10
4WEH22E7X/6EW110N9ETSK4/B10
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The 4WEH22E7X/6EW110N9ETSK4/B10 directional spool valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth. Intended to route pressure and return lines in hydraulic automation circuits, it uses electro-hydraulic actuation so a low-power solenoid can pilot the main spool under oil pressure. The valve is supplied in nominal size NG25, providing passage dimensions suited to medium-flow machinery. A 4-way flow path offers one pressure, two service, and one tank port, while the 3-position spool identified by Symbol E introduces a centered neutral state for load holding. Ports withstand operating pressures up to 280 bar, supporting high-duty service. Subplate mounting allows removal without disturbing pipework, and the ISO 4401-08-08-0-05 porting pattern aligns with standard manifolds for interchangeability. Electrical connection is made through a DIN EN 175301-803 K4 plug, enabling quick coupling of coil power and pilot signals.
Pilot circuitry tolerates up to 210 bar and requires a minimum of 10.5 bar when the spring-centered design is used, assuring dependable shifting in all positions. Both pilot supply and return are internal, eliminating external hoses and simplifying manifold layouts. A 1.0 mm throttle insert tempers pilot flow, preventing sudden spool movement. A concealed manual override permits local actuation without exposing the mechanism during maintenance. The hydraulic medium must reach ISO 4406 cleanliness class 20/18/15 to protect the precision lands from abrasion. An Mttfd of 100 years assists safety engineers in reliability analysis, and the version with two solenoids and a return spring weighs 11.9 kg, data that guides support bracket design and handling procedures.
Technical Specifications
Actuation
Electro-Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Fluid Cleanliness Class
ISO 4406 (20/18/15)
Manual Override
Concealed (N9)
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
210 bar
Min Pilot Pressure (3-pos Spring)
10.5 bar
Mounting Type
Subplate
Mttfd
100 years
Nominal Size
NG25
Pilot Supply/return
Internal/Internal (ET)
Porting Pattern
ISO 4401-08-08-0-05
Spool Type
3-Position (Symbol E)
Throttle Insert
1.0 mm (B10)
Way Configuration
4-Way
Weight (2 Solenoids, Spring)
11.9 kg
1620 Old Apex Road
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