Bosch Rexroth | H-4WMM16C7XF
H-4WMM16C7X/F
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The H-4WMM16C7X/F directional spool valve belongs to the WM Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated circuits. It has a nominal size of 16 for medium-frame manifolds and is shifted manually through a hand lever, allowing direct operator control when electrical actuation is unnecessary. A detent holds the spool in the selected position until it is intentionally moved, supporting steady flow without constant handle force. For high-capacity circuits, spool C with the detent permits up to 300 l/min, while the flow cross-section on channels a or b to t identified by symbol Q is 32 mm² to minimize pressure loss. A reduced 6 mm² cross-section on the alternate channel denoted by symbol W helps meter pilot flow during fine positioning tasks, letting the valve switch between full-flow and restricted-flow conditions inside hydraulic automation platforms.
The housing withstands 350 bar on ports a, b, and p, with a tank port rating of 250 bar, and an internal relief opens at a 160 bar drain threshold to protect the return circuit. Oil exits through drain port L, separating leakage from the main line to keep actuation forces low. System cleanliness must reach ISO 4406 code 20/18/15 to preserve spool fit and prevent sticking, and NBR seals contain petroleum-based fluids at the stated pressures. The unit bolts to subplates following DIN 24340 Form A16 and matches the ISO 4401-07-07-0-05 porting pattern so it can replace standard size 16 valves. Installation uses M10 × 60 screws of grade 10.9 tightened to 75 Nm, ensuring the valve seats firmly without gasket extrusion. Together these mounting and pressure features integrate the valve reliably into industrial hydraulic manifolds.
Technical Specifications
Actuation
Hand Lever
Cleanliness Class (iso 4406)
20/18/15
Detent
Yes
Flow Cross-section (a/b→t, Symbol Q)
32 mm²
Flow Cross-section (a/b→t, Symbol W)
6 mm²
Flow Limit (spool C, With Detent)
300 l/min
Leakage Oil Drain Port
L
Maximum Operating Pressure (a/b/p)
350 bar
Maximum Tank Port Pressure (t)
250 bar
Mounting Pattern
DIN 24340 Form A16
Mounting Screw Size
M10 × 60 (ISO 4762-10.9)
Mounting Screw Torque
75 Nm
Nominal Size
16
Porting Pattern
ISO 4401-07-07-0-05
Seal Material
NBR
Tank Pressure Drain Threshold
160 bar
1620 Old Apex Road
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