Bosch Rexroth | 4WEH16L7X6EG24N9K4
4WEH16L7X/6EG24N9K4
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The 4WEH16L7X/6EG24N9K4 directional spool valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series. It routes hydraulic flow to actuators in automated machinery. With a nominal size of NG16, the valve matches manifolds sized for medium flow circuits. Its mounting face follows porting pattern ISO 4401-07-07-0-05 so it aligns with standardized subplates. Pilot control is handled by a 6E solenoid stage that receives oil from an external supply, allowing the main spool to shift without drawing fluid from the working lines. The three-position spool needs a pilot volume of 5.72 cm³, a figure that defines the response time of the control stage. Pilot shift is possible once the pressure reaches the 14 bar minimum, while the pilot circuit can tolerate up to 250 bar before relief is required. The main flow paths at ports P, A, and B withstand 280 bar, supporting cylinders that operate at high working pressures.
The electrical interface is a DIN EN 175301-803 K4 plug, energized at 24 V DC to drive the solenoid of the pilot stage, allowing assembly to connect with standard machine wiring harnesses. A concealed manual override identified as N9 permits on-site actuation when power is unavailable, yet remains protected against accidental operation once the cover is in place. The valve passes up to 300 l/min, which suits high flow presses and large servo axes that would exceed the capacity of smaller NG10 units. Return port T endures 250 bar, and the drain port Y is limited to 210 bar in direct-current service, so back-pressure in the tank line does not compromise spool centering. Fluid purity must not exceed ISO 4406 class 20/18/15 to preserve spool clearances and solenoid seals across long service intervals. The assembled unit weighs 8.9 kg, so installers must provide adequate support during panel mounting to avoid strain on the manifold bolts.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Pilot Pressure
250 bar
Max Pressure (p, A, B)
280 bar
Max Pressure (port T)
250 bar
Max Pressure (port Y)
210 bar (DC)
Min Pilot Pressure
14 bar
Nominal Size
NG16
Pilot Control Valve
6E
Pilot Oil Supply
External
Pilot Volume (3-spool)
5.72 cm³
Porting Pattern
ISO 4401-07-07-0-05
Rated Voltage
24 V DC
Weight
8.9 kg
1620 Old Apex Road
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