Bosch Rexroth | H-4WEH16E7X6EW110N9K4
H-4WEH16E7X/6EW110N9K4
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The H-4WEH16E7X/6EW110N9K4 valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and serves to switch hydraulic flow paths in automated machinery. It is built to the NG16 nominal size, so its ports match common 16 mm subplate channels. With spool type E it supports a maximum flow of 300 l/min, allowing high-volume circuits to operate without excessive pressure drop. The main gallery can withstand 350 bar maximum operating pressure, enabling use in heavy-duty presses or mobile equipment. A 6E high-power pilot valve supplies the shifting force, and its pilot circuit may be loaded up to 250 bar while still functioning correctly. The spring-centered design begins to shift once 14 bar pilot pressure is reached, guaranteeing predictable response at low signal levels. Backpressure in the Y pilot return line is permissible up to 160 bar, so remote tank routing is not always required. A concealed N9 manual override is present, permitting emergency spool movement without exposing the button to accidental activation.
Installation follows a subplate mounting arrangement that simplifies valve replacement during service work. Ports conform to the ISO 4401 pattern, so the unit mates with standard CETOP 5 manifolds. Fixing hardware is specified as M10 x 60 socket head screws under ISO 4762, and each screw must be tightened to 58 Nm to maintain gasket compression. Dynamic sealing surfaces use NBR material, providing compatibility with common mineral-based hydraulic oils. The valve remains within its thermal limits at fluid temperatures up to 80 °C, suiting most industrial reservoirs. A two-solenoid spring-centered configuration weighs 8.9 kg, light enough for manual handling during panel assembly. Functional safety is reflected in an MTTFd of 100 years, indicating low probability of dangerous failure throughout extended service life.
Technical Specifications
Manual Override
Concealed (N9)
Max Flow (spool E, Ng16)
300 l/min
Max Fluid Temperature (nbr)
+80 °C
Max Operating Pressure
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Bolt Torque (ng16)
58 Nm
Mounting Bolts
M10 x 60 (ISO 4762)
Mounting Type
Subplate Mounting
Mttfd
100 Years
Nominal Size
NG16
Pilot Return Y Max Pressure (ac)
160 bar
Pilot Valve Type
6E (High-Power)
Porting Pattern
ISO 4401
Seal Material
NBR
Weight (two-solenoid, Spring-centered)
8.9 kg
1620 Old Apex Road
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