Bosch Rexroth | 4WEH16D7XOF6EW110N9ES2K4
4WEH16D7X/OF6EW110N9ES2K4
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The 4WEH16D7X/OF6EW110N9ES2K4 directional valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It directs pressurized fluid to actuators in automated hydraulic machinery. Electro-hydraulic actuation lets a solenoid-driven pilot stage move the main spool without large manual force. The NG16 size supports mid-range flow rates in compact manifolds, and the 4/2-way layout with two spool positions selects either work circuit or neutral return. A D-profile spool establishes the specific port interconnections used in equipment diagrams. Mounting follows the ISO 4401-07-07-0-05 pattern so it fits standard subplates. The P, A, and B ports withstand operating pressures up to 280 bar, allowing use in high-pressure circuits. For excitation, the pilot coil accepts 110 V AC at either 50 or 60 Hz, matching common plant power supplies.
Pilot oil is taken internally through port X so no separate feed line is needed, while return flow leaves the pilot stage externally via port Y to reduce back-pressure in the cover. The pilot circuit tolerates pressures up to 250 bar and requires at least 4.5 bar when supplied internally; when an external pilot source is used the minimum rises to 14 bar to ensure reliable shifting. Electrical power reaches the coil through a DIN EN 175301-803 plug coded K4, which simplifies quick replacement in the field. A concealed manual override marked N9 lets maintenance personnel operate the spool during setup without energizing the solenoid. Switching speed can be tailored with the S2 discharge control so response times match system cushioning or shock limits. Together these features support accurate, repeatable valve movement within demanding hydraulic automation sequences.
Technical Specifications
Actuation
Electro-Hydraulic
Coil Voltage
110 V AC (50/60 Hz)
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (x External)
14 bar
Min Pilot Pressure (x Internal)
4.5 bar
Pilot Return
External (Y)
Pilot Supply
Internal (X)
Porting Pattern
ISO 4401-07-07-0-05
Spool Positions
2-Position
Spool Symbol
D
Switching Time Adjustment
Discharge Control (S2)
Valve Size
NG16
Way Configuration
4/2-Way
1620 Old Apex Road
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