Bosch Rexroth | 4WEH16W7X6EG24N9ETK4B10
4WEH16W7X/6EG24N9ETK4/B10
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The 4WEH16W7X/6EG24N9ETK4/B10 directional spool valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It is a 4-way device intended to route pressure and return lines in hydraulic automation circuits built to size NG16 standards. The W spool geometry yields a zero-position A-to-T flow area of 6 mm², and a spring-centered return automatically brings the spool to this neutral state when pilot pressure is removed. With this spool in NG16 format, the valve accommodates up to 300 l/min while sustaining 280 bar at ports P, A, and B. Connection to a manifold follows the ISO 4401-07-07-0-05 porting pattern, which simplifies block mounting and ensures interchangeability within modular systems.
Pilot control is taken internally, with both supply and return oil routed through the body, and the solenoid operates from a nominal 24 V DC source. Electrical hookup is completed through a DIN EN 175301-803 K4 connector, and a concealed N9 manual override lets operators shift the spool during commissioning or power loss. The pilot stage endures up to 250 bar yet only needs 14 bar to overcome the centering spring; return flow in the internal Y path is limited to 210 bar. A 1.0 mm throttle insert identified as B10 restricts pilot flow to damp rapid transitions, maintaining stable movement under varying loads.
Technical Specifications
Control Spool Return
Spring-Centered
Electrical Connection
DIN EN 175301-803 (K4)
Manual Override
Concealed (N9)
Max Flow (spool W, Ng16)
300 l/min
Max Operating Pressure (p,a,b)
280 bar
Max Pilot Pressure
250 bar
Max Pilot Return Pressure (y Internal)
210 bar
Min Pilot Pressure (spring-centered)
14 bar
Nominal Voltage (pilot)
24 V DC
Pilot Oil Supply/return
Internal (ET)
Porting Pattern
ISO 4401-07-07-0-05
Size
NG16
Spool Symbol
W
Throttle Insert Orifice
1.0 mm (B10)
Valve Version
4-Way
Zero Position A-t Area (w)
6 mm2
1620 Old Apex Road
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