Bosch Rexroth | 4WEH16HD7XOF6EG24N9ETSK4B10
4WEH16HD7X/OF6EG24N9ETSK4/B10
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The 4WEH16HD7X/OF6EG24N9ETSK4/B10 valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth. It directs hydraulic flow to automate actuators in mobile and industrial machinery. The 4-way configuration provides two controlled flow paths so cylinders or motors can extend and retract under command. Nominal size NG16 sets the mounting interface and supports medium flow circuits, while a hydraulic spool return re-centers the spool when pilot pressure is removed to resume neutral. A concealed manual override allows local switching during commissioning without exposing moving parts. The pilot oil is supplied internally from port P, and the return is routed internally to tank through port T, which eliminates external pilot lines. A 24 V DC solenoid energizes the pilot stage and connects through a DIN EN 175301-803 K4 plug to integrate with standard machine wiring.
The valve follows the ISO 4401 porting pattern so it fits common subplates without adapter blocks. A Ø 1.0 mm throttle insert identified as B10 is installed to limit flow surges on the pilot circuit. Switching time can be adjusted with the supply control S feature, giving technicians a way to match actuation speed to system dynamics. The main flow channel is rated for 300 l/min, providing adequate capacity for large cylinders. Ports P, A, and B withstand operating pressures up to 280 bar, while the pilot stage may be loaded to 250 bar without damage. Internal pilot return must stay below 210 bar in DC applications, and at least 14 bar pilot pressure is required to shift the spool fully into an end position.
Technical Specifications
Control Spool Return (main)
Hydraulic
Electrical Connection
DIN EN 175301-803 K4
Manual Override
Concealed
Max Flow (hd)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (internal)
210 bar (DC)
Min Pilot Pressure (hydraulic End Pos.)
14 bar
Nominal Size
NG16
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (P)
Porting Pattern
ISO 4401
Solenoid Voltage
24 V DC
Switching Time Adjustment
Supply Control (S)
Throttle Insert
Ø 1.0 mm (B10)
Way Configuration
4-Way
1620 Old Apex Road
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