Bosch Rexroth | 4WH22E7XS
4WH22E7X/S
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The 4WH22E7X/S valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series and directs pressurized oil to actuators in automated hydraulic circuits. Its nominal size is NG25, allowing installation on manifolds sized for medium-to-high flow. An ISO 4401 porting pattern provides interchangeability with standard subplates. Ports A and B withstand 280 bar, and symbol E flow reaches 450 l/min so actuators can move quickly under load. A spring-centered pilot stage shifts when at least 10.5 bar is available and tolerates pilot lines up to 210 bar. Return paths are secured because port T handles 250 bar while port Y accepts 210 bar. The pilot section displaces 7.64 cm³ of oil per stroke, information used to size control lines and predict response time.
The unit operates in ambient temperatures up to 50 °C and should be stored below 40 °C to protect seals. Hydraulic fluid may reach 80 °C without affecting spool fit. System cleanliness must meet ISO 4406 code 20/18/15 to reduce wear on metering edges. A maximum coating thickness of 100 µm supplies corrosion protection without altering mounting surfaces. M12 mounting screws require 100 Nm of torque to secure the valve against shock loading. The mean time to dangerous failure is 150 years, giving a lengthy reliability benchmark for safety calculations. These environmental, cleanliness, fastening, and durability limits define the complete operating envelope for the 4WH22E7X/S.
Technical Specifications
Ambient Temp (max, Nbr)
+50 °C
Cleanliness Class
ISO 4406 20/18/15
Coating Thickness (max)
100 µm
Hydraulic Fluid Temp (max, Nbr)
+80 °C
Max Flow (symbol E)
450 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
210 bar
Max Port T Pressure
250 bar
Max Port Y Pressure
210 bar
Min Pilot Pressure (3-pos, Spring-centered)
10.5 bar
Mounting Screw Torque (m12)
100 Nm
Mttfd
150 years
Nominal Size
NG25
Pilot Oil Volume (3-pos Valve)
7.64 cm3
Porting Pattern
ISO 4401
Storage Temp (max)
+40 °C
1620 Old Apex Road
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