Bosch Rexroth | 4WEH16GA7X6EW110N9K4
4WEH16GA7X/6EW110N9K4
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The 4WEH16GA7X/6EW110N9K4 directional valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth. It serves as a 4/3-way control element that directs hydraulic flow to actuators in automated machinery. Electro-hydraulic actuation energizes a pilot stage so that the main NG16 spool can shift with limited electrical power while still handling system pressure. The spool carries the symbol G on the actuating side A, defining its internal flow paths for neutral, extend, and retract positions. A spring-centered return mechanism automatically brings the spool to its center position when pilot pressure is removed, maintaining fail-safe blocking of work ports. Subplate mounting allows the valve to be installed quickly on manifolds, and the ISO 4401-07-07-0-05 porting pattern aligns pressure, tank, and service ports with standard base plates. Electrical connection is made through a DIN EN 175301-803 plug, enabling straightforward wiring of the solenoid coils.
Hydraulic performance is rated for a continuous operating pressure of 280 bar on the P, A, and B ports, permitting use in high-pressure circuits. The T port withstands up to 250 bar, matching the maximum pilot supply limit of 250 bar for the integrated control stage. A minimum pilot pressure of 14 bar is required for reliable spool shift in the three-position spring-centered configuration. The G-type spool passes up to 210 l/min at 280 bar, supporting large actuator demands without excessive pressure drop. System cleanliness should reach ISO 4406 class 20/18/15 to protect the precision fit between spool and bore. A concealed manual override lets maintenance staff move the spool mechanically during commissioning without exposing the mechanism to contamination. Functional safety is reflected in a mean time to dangerous failure of 100 years, demonstrating long service life under normal duty.
Technical Specifications
Actuation Type
Electro-Hydraulic
Centering Method
Spring-Centered
Electrical Connection
DIN EN 175301-803
Fluid Cleanliness Class
20/18/15 (ISO 4406)
Manual Override
Concealed
Max Flow (g Spool @ 280 Bar)
210 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Port T Pressure
250 bar
Min Pilot Pressure (3-pos Spring-centered)
14 bar
Mounting
Subplate Mounting
Mttfd
100 years
Porting Pattern
ISO 4401-07-07-0-05
Spool Symbol
G (Actuating Side A)
Valve Function
4/3-Way
Valve Size
NG16
1620 Old Apex Road
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