Bosch Rexroth | H-4WMM22E7XV
H-4WMM22E7X//V
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The H-4WMM22E7X//V directional spool valve belongs to the WM Directional Spool Valves series from Bosch Rexroth and is intended to switch hydraulic flow paths in automated circuits. It is actuated by a hand lever, and the spool returns to its neutral position through a spring that requires 105 N of force. The valve is produced in size 25, offers four main ports, and uses the ISO 4401-08-08-0-05 porting pattern to fit standardized manifolds. Sealing is handled by FKM material, and the design includes a spring return so external resetting devices are not needed. Proper installation demands a mounting surface roughness no greater than Rzmax 4 to maintain leak-free operation.
The unit accommodates a maximum flow of 450 l/min while sustaining up to 350 bar on ports A, B, and P; back-pressure at the T port is limited to 250 bar. Hydraulic fluids may have viscosities between 2.8 and 380 mm²/s, allowing use with a broad range of oils. Ambient temperatures can range from −20 °C to +80 °C when FKM seals are installed, enabling service in moderate thermal environments. The required oil cleanliness is ISO 4406 20/18/15, which guards internal components against abrasive wear and sticking. These operating limits define how the valve integrates into high-pressure, high-flow hydraulic automation.
Technical Specifications
Actuating Force (spring Return)
105 N
Actuation
Hand Lever
Ambient Temperature Max (fkm)
+80 °C
Ambient Temperature Min (fkm)
-20 °C
Cleanliness Class
ISO 4406 20/18/15
Maximum Flow
450 l/min
Maximum Operating Pressure (a, B, P)
350 bar
Maximum Pressure (t Port)
250 bar
Mounting Surface Roughness
Rzmax 4
Number Of Main Ports
4
Porting Pattern
ISO 4401-08-08-0-05
Seal Material
FKM
Size
25
Spring Return
Yes
Viscosity Max
380 mm²/s
Viscosity Min
2.8 mm²/s
1620 Old Apex Road
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