Bosch Rexroth | 4WEH16D7X6EW110N9K4V-CSA
4WEH16D7X/6EW110N9K4/V CSA
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The 4WEH16D7X/6EW110N9K4/V CSA directional spool valve is manufactured by Bosch Rexroth as part of the WEH Directional Spool Valves series. It directs hydraulic flow paths in automation circuits and is sized as valve 16 (NG16) to serve medium-capacity actuators. A porting pattern conforming to ISO 4401-07-07-0-05 permits drop-in mounting on standard subplates. The DIN EN 175301-803 K4 electrical connection gives the solenoid a plug-in interface for quick service. A concealed manual override identified by code N9 permits local shifting during start-up without exposing moving parts. Pilot oil enters internally at X and returns externally at Y, reducing tank line pressure losses. The unit handles up to 280 bar on ports P, A, and B and passes as much as 300 l/min under symbol D conditions. Achieving the shortest switching time requires 35 l/min of pilot flow to move the spool rapidly.
Installation stability is provided by M10 × 60 screws specified under ISO 4762, each torqued to 58 Nm to prevent plate distortion. FKM seals resist mineral oils and withstand thermal expansion expected in service. The pilot circuit safely accommodates pressures up to 250 bar, while the spring-centered two-spool design starts functioning once 14 bar is available, ensuring consistent response across power unit variations. A calculated MTTFd of 100 years supports machine safety assessments that rely on high component reliability. Ambient operation is allowed from –15 °C to +50 °C, so the valve remains responsive in unconditioned industrial environments. Together, these properties enable precise, durable flow control in automated hydraulic machinery.
Technical Specifications
Electrical Connection
DIN EN 175301-803 K4
Manual Override
Concealed (N9)
Max Ambient Temperature (fkm)
+50 C
Max Flow (symbol D, Ng16)
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Ambient Temperature (fkm)
-15 C
Min Pilot Pressure (2-spool Spring)
14 bar
Mounting Screws
M10 x 60 (ISO 4762)
Mttfd
100 years
Pilot Flow For Shortest Switching Time
35 l/min
Pilot Oil Supply/return
E (X internal, Y external)
Porting Pattern
ISO 4401-07-07-0-05
Screw Tightening Torque
58 Nm
Seal Material
FKM
Valve Size
16 (NG16)
1620 Old Apex Road
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