Bosch Rexroth | H-4WMM22D7XF
H-4WMM22D7X/F
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The H-4WMM22D7X/F is a manually operated valve produced by Bosch Rexroth for the WM Directional Spool Valves series. Designed for hydraulic automation, it directs flow between work lines when machines require precise circuit selection. A hand lever provides actuation so operators can shift the spool without auxiliary power. The valve contains four ports, and the D spool symbol configures equal path connections for standard cylinder circuits. Working lines a and b and the pressure port p withstand up to 350 bar, while the tank port T is limited to 250 bar to protect return plumbing. A maximum flow of 450 l/min supports high-volume systems such as press frames or molding machines. The mechanism incorporates a detent that holds the chosen position until the lever is moved again. Lever travel is limited by an actuating angle of 24.5 degrees on each side of the neutral position, ensuring repeatable switching and preventing over-stroke.
With a nominal size 25 body, the H-4WMM22D7X/F conforms to the ISO 4401-08-08-0-05 mounting pattern so it can bolt to standardized sub-plates. The DIN 24340 Form A25 porting layout aligns internal passages with companion manifolds, reducing pressure losses. NBR seals contain the working medium and tolerate the approved fluids HL, HLP, HETG, HEPG, and HEES commonly found in industrial plants. The valve demands oil cleanliness no worse than ISO 4406 class 20/18/15 to maintain spool reliability, and mating surfaces must reach a roughness of Rzmax 4 to avoid leakage paths. Because the installation position is optional, designers can place the unit horizontally or vertically without performance change. Robust machining tolerances further aid consistent shift forces during long duty cycles. Each of these features supports straightforward integration and long service life in automated hydraulic equipment.
Technical Specifications
Actuating Angle From Central
2 x 24.5 deg
Cleanliness Class
ISO 4406 20/18/15
Detent
Yes
Hydraulic Fluid
HL, HLP, HETG, HEPG, HEES
Installation Position
Optional
Iso Mounting Pattern
ISO 4401-08-08-0-05
Maximum Flow
450 l/min
Maximum Operating Pressure (a/b/p)
350 bar
Maximum Port T Pressure
250 bar
Number Of Ports
4
Porting Pattern
DIN 24340 Form A25
Required Surface Quality
Rzmax 4
Seal Material
NBR
Size
25
Spool Symbol
D
Type Of Actuation
Hand Lever
1620 Old Apex Road
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