Bosch Rexroth | 4WEH16EA7X6EG125N9ETK4B10V
4WEH16EA7X/6EG125N9ETK4/B10V
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The 4WEH16EA7X/6EG125N9ETK4/B10V valve belongs to the WEH Directional Spool Valves series and is manufactured by Bosch Rexroth for hydraulic automation circuits that require reliable flow direction control. It is built in size NG16, and the E-type spool provides three positions with spring centering so the actuator returns to neutral when pilot pressure is removed. During operation the valve can pass up to 300 l/min, while the pressure at ports P, A, or B may reach 280 bar. The tank port tolerates 250 bar, allowing high-pressure return lines without external relief. Pilot oil is supplied internally through port E and also returned internally through port T, simplifying manifold layouts. A minimum pilot pressure of 14 bar is needed to shift the spool consistently.
In addition, the pilot stage accepts pressures up to 250 bar and sends the internal return flow back at up to 210 bar when powered from a DC supply. The hydraulic cleanliness requirement is ISO 4406 class 20/18/15 to safeguard the FKM seals that are fitted throughout the unit. Electrical actuation is wired through a DIN EN 175301-803 connector coded K4, and a concealed manual override marked N9 lets maintenance staff move the spool without power during commissioning. Mounting is accomplished on a sub-plate that follows the ISO 4401-07-07-0-05 porting pattern, and a throttle insert with a 1.0 mm orifice identified as B10 can be installed to limit pilot flow. These features complete the specification set for consistent service in demanding hydraulic machines.
Technical Specifications
Cleanliness Class
ISO 4406 (c) 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (symbol E)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (internal)
210 bar (DC)
Max Pressure (port T)
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (E)
Porting Pattern
ISO 4401-07-07-0-05
Seal Material
FKM (V)
Size
NG16
Spool Symbol
E (3-Position, Spring-Centered)
Throttle Insert
Ø 1.0 mm (B10)
1620 Old Apex Road
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