Bosch Rexroth | H-4WMM16E7XFV
H-4WMM16E7X/F/V
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The H-4WMM16E7X/F/V valve belongs to the WM Directional Spool Valves series from Bosch Rexroth and is intended for routing pressurized oil in hydraulic automation. Its hand-lever detent actuation keeps the selected flow path locked until the operator moves the lever again, and the spool provides three distinct positions for common extend, neutral, and retract functions. Each shift requires an actuating angle of 26 ° from center on both sides, making handle travel predictable. The housing accommodates up to 300 l/min, while ports A, B, and P are rated for 350 bar and the tank port is limited to 250 bar to protect return circuits. Installation follows the ISO 4401-07-07-0-05 subplate pattern, and the M10 mounting bolts must be tightened to 75 N·m to ensure a secure seal between valve and manifold.
FKM seals allow use with a wide range of fluids and support ambient temperatures up to 80 °C. Hydraulic oil can circulate from −20 °C to 80 °C so the unit handles both cold starts and elevated operating heat. Viscosity from 2.8 to 380 mm²/s is acceptable, which covers light refinery stocks through heavy‐grade oils. Reliable service depends on maintaining fluid cleanliness at ISO 4406 code 20/18/15 to limit abrasion inside the spool lands. Any internal leakage is routed to a drain port that can tolerate 160 bar, letting the valve work in systems where back-pressure may form. These thermal, viscosity, cleanliness, and leakage limits confirm the valve’s readiness for industrial hydraulic circuits exposed to broad temperature swings and intermittent high return pressures.
Technical Specifications
Actuating Angle From Center
2 × 26°
Actuation Type
Hand Lever (Detent)
Ambient Temperature Max (fkm)
+80 °C
Cleanliness Class
ISO 4406 20/18/15
Hydraulic Fluid Temp Max (fkm)
+80 °C
Hydraulic Fluid Temp Min (fkm)
-20 °C
Leakage Port Threshold
160 bar
Maximum Flow
300 l/min
Maximum Operating Pressure (a/b/p)
350 bar
Maximum Operating Pressure (t)
250 bar
Mounting Bolt Torque (m10)
75 Nm
Porting Pattern
ISO 4401-07-07-0-05
Seal Material
FKM
Spool Positions
3
Viscosity Max
380 mm2/s
Viscosity Min
2.8 mm2/s
1620 Old Apex Road
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