Bosch Rexroth | 4WEH16H7X6EG24N9TK4QM0G24
4WEH16H7X/6EG24N9TK4QM0G24
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The 4WEH16H7X/6EG24N9TK4QM0G24 directional spool valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for hydraulic automation where remote pilot control is required. It uses a nominal size of NG16 so it integrates with medium-flow subplates. A 4-way port configuration directs pump flow to and from actuators, while the ISO 4401-07-07-0-05 porting pattern keeps the interface consistent with standardized manifolds. Pilot oil is supplied externally through port X and returned internally via port T, a layout that separates the pilot stage from load pressure and removes the need for an additional drain line. A pilot flow of 35 l/min delivers the shortest switching time to minimize response lag. The control spool is returned hydraulically, maintaining centering force without relying on springs. A 24 V DC solenoid energizes the pilot stage, and the plug-in voltage matches common machine control systems.
Electrical connection for the pilot solenoid is made with a DIN EN 175301-803 K4 plug, reducing wiring time during service. A concealed N9 manual override allows technicians to shift the spool mechanically during setup or testing. The main ports tolerate operating pressures up to 350 bar so the valve can drive high-force cylinders, and the pilot stage withstands 250 bar to ensure reliable actuation under full system load. A minimum pilot pressure of 16 bar is required with a three-position, pressure-centered spool to prevent unintended movement at low standby pressures. Mounting is completed with four M10 × 60 ISO 4762 screws that match standard manifold threads, and each screw is tightened to 58 N·m to keep the sealing surfaces compressed. Rest-position feedback is available through a QM0 sensor powered at 24 V, giving the controller confirmation that the spool has returned to neutral.
Technical Specifications
Control Spool Return
Hydraulic
Electrical Connector (pilot)
DIN EN 175301-803 (K4)
Manual Override (pilot)
Concealed (N9)
Max Operating Pressure (p, A, B)
350 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (3-pos, Pressure-centered)
16 bar
Mounting Screw Torque (ng16)
58 Nm
Mounting Screws (ng16)
M10 x 60 (ISO 4762)
Nominal Size
NG16
Pilot Flow For Shortest Switching Time
35 l/min
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Port Configuration
4-Way
Porting Pattern
ISO 4401-07-07-0-05
Position Monitoring
Rest Position QM0 (24 V)
Solenoid Voltage (pilot)
24 V DC
1620 Old Apex Road
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