Bosch Rexroth | 4WEH16H7X6EG24N9TK4
4WEH16H7X/6EG24N9TK4
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The 4WEH16H7X/6EG24N9TK4 directional valve is produced by Bosch Rexroth in the WEH Directional Spool Valves series. It uses electro-hydraulic actuation, allowing an electrical pilot signal to shift the spool with hydraulic power. The 4-way flow path gives two service ports and dedicated pressure and tank lines for circuit switching. Its NG16 nominal size matches systems that use size 16 subplates and manifolds. A 24 V DC coil energizes the pilot stage to initiate movement. The DIN EN 175301-803 K4 connector provides a standardized electrical interface for quick wiring. Spool centering is achieved by a hydraulic return, eliminating mechanical springs. Pilot oil is supplied externally through port X, while return oil is routed internally to port T to simplify plumbing.
A concealed manual override lets maintenance staff shift the spool without energizing the coil. The valve tolerates 280 bar on ports P, A, and B to accommodate high-pressure circuits. Pilot pressure can reach 250 bar so the pilot stage remains responsive under system load. Port T is rated for 250 bar, supporting circuits where return pressures rise during operation. Port Y for drainage in direct current configurations is limited to 210 bar to protect seals. The mounting surface follows ISO 4401-07-07-0-05, ensuring interchangeability with standard subplates. Four M10 × 60 screws according to ISO 4762 secure the body to the manifold. Each screw must be tightened to 58 Nm with a tolerance of ±10 percent to maintain seal integrity.
Technical Specifications
Actuation Type
Electro-Hydraulic
Coil Voltage
24 V DC
Control Spool Return
Hydraulic
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Max Pressure Port Y (dc)
210 bar
Mounting Interface
ISO 4401-07-07-0-05
Mounting Screw Torque
58 Nm ±10%
Mounting Screws
4x M10 x 60 (ISO 4762)
Nominal Size
NG16
Pilot Return
Internal (T)
Pilot Supply
External (X)
Way Configuration
4-Way
1620 Old Apex Road
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