Bosch Rexroth | 4WEH22R7X6EG24N9K4-CSA
4WEH22R7X/6EG24N9K4 CSA
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The 4WEH22R7X/6EG24N9K4 CSA valve belongs to the WEH Directional Spool Valves series manufactured by Bosch Rexroth for controlling actuator flow in hydraulic automation. Its nominal size of NG25 defines the 25 mm port diameter used in manifold installations, while the ISO 4401-08-08-0-05 porting pattern aligns the subplate connections with industry standards. A maximum operating pressure of 280 bar allows the main ports p, a, and b to carry high-pressure fluid without damage. The R-type spool passes up to 450 l/min when spring-centered, supporting systems that demand high volume. Shifting requires at least 10.5 bar pilot pressure, and the pilot stage tolerates up to 210 bar so control lines can share common supply pressures. Each three-position change moves 7.64 cm³ of pilot oil, a factor for sizing accumulators. Fluid cleanliness must not exceed ISO 4406 20/18/15 to avoid spool erosion, and the 24 V DC rated voltage matches common machine control power.
The solenoids connect through a DIN EN 175301-803 K4 plug, providing a sealed electrical interface that simplifies maintenance. Port T withstands up to 250 bar, permitting high back-pressure return circuits, and pilot port Y accepts the same 210 bar limit as the control inlet so internal drainage can feed restrictive lines. Six M12 × 60 ISO 4762 screws secure the housing, and each screw must be tightened to 100 Nm to maintain gasket compression under load. The assembled valve weighs 11.9 kg with two solenoids and springs, influencing bracket selection and handling procedures. A calculated MTTFd of 100 years supports long service intervals in safety-related applications. These characteristics position the valve for durable, high-capacity flow direction within automated hydraulic machinery.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Max Flow (spool R, Spring-centered)
450 l/min
Max Operating Pressure (p/a/b)
280 bar
Max Pilot Port Y Pressure (dc)
210 bar
Max Pilot Pressure
210 bar
Max Port T Pressure
250 bar
Min Pilot Pressure (spring-centered)
10.5 bar
Mounting Screw Torque
100 Nm
Mounting Screws
6x M12 x 60 (ISO 4762)
Mttfd (type Weh)
100 years
Nominal Size
NG25 (W.H 22)
Pilot Volume Per Switching (3-pos)
7.64 cm3
Porting Pattern
ISO 4401-08-08-0-05
Rated Voltage (dc)
24 V
Weight (two Solenoids, Spring)
11.9 kg
1620 Old Apex Road
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