Bosch Rexroth | 4WEH16C7X6EW110N9TK4
4WEH16C7X/6EW110N9TK4
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The 4WEH16C7X/6EW110N9TK4 valve is part of the WEH Directional Spool Valves series from Bosch Rexroth and is intended to shift hydraulic flow between circuits. With a nominal size of NG16, it matches medium-frame manifolds common in industrial presses and mobile machinery. The ISO 4401-07-07-0-05 porting pattern lets the unit bolt directly onto standardized subplates, reducing plumbing time. A two-position spool built to symbol C provides alternate flow paths for cylinder extend and retract commands. The valve can pass up to 300 l/min, supporting high-volume actuators, while a maximum operating pressure of 280 bar at ports P, A, and B allows use on high-pressure systems. Return port T is limited to 250 bar so line components downstream remain within rating. Electrical connection through DIN EN 175301-803 K4 gives a sealed plug interface for the solenoid, and a concealed manual override N9 enables emergency shifting without exposed levers.
An external pilot oil supply at port X separates the control stage from load pressure and an internal return to port T eliminates the need for a second drain line. The spool shifts once pilot pressure reaches 14 bar, ensuring operation even on cold-start viscosity, and it can tolerate up to 250 bar to accommodate remote or throttled supplies. Achieving the minimum switching force requires 35 l/min of pilot flow, and each actuation consumes 11.45 cm³ of pilot oil, information useful when sizing accumulators. Mounting screws must be tightened to 58 Nm with a ±10 % tolerance so the gasket seals without distorting the valve body. Together, these pilot and mounting parameters complete the functional data needed to integrate the valve into automated hydraulic circuits.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (ng16, Symbol C)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pressure Port T
250 bar
Min Pilot Pressure
14 bar
Mounting Screw Torque
58 Nm ±10%
Nominal Size
NG16
Pilot Flow For Min Switching
35 l/min
Pilot Oil Return
Internal (T)
Pilot Oil Supply
External (X)
Pilot Volume Per Switch
11.45 cm³
Porting Pattern
ISO 4401-07-07-0-05
Spool Positions
2
Spool Symbol
C
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