Bosch Rexroth | 4WEH16E7X6EW110N9TSK4B08-CSA
4WEH16E7X/6EW110N9TSK4/B08 CSA
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The 4WEH16E7X/6EW110N9TSK4/B08 CSA is produced by Bosch Rexroth within the WEH Directional Spool Valves series and directs hydraulic flow in automated systems. With a nominal size of NG16 it passes up to 300 l/min. Ports P, A and B withstand 280 bar, while the tank port is rated for 250 bar. The pilot stage operates to 250 bar and needs at least 14 bar to recentralize the spool when spring-centered. Pilot oil is supplied externally at X and returned internally to T according to configuration T (X ext., T int.). Electrical actuation uses a DIN EN 175301-803 K4 connector, and a concealed N9 manual override lets the spool be shifted without power. Pilot flow is restrained by a 0.8 mm throttle identified as B08 to improve stability.
Mounting follows the ISO 4401-07-07-0-05 port pattern and employs four M10 x 60 ISO 4762 screws tightened to 58 Nm. Approved media include HL, HLP, HLPD, HVLP and HVLPD oils, and system cleanliness must meet ISO 4406 class 20/18/15. The design achieves a mean time to dangerous failure of 100 years, providing long-term reliability. Clean bolt clamping, qualified fluids and the specified cleanliness level ensure consistent function under the stated pressure and flow limits.
Technical Specifications
Cleanliness Class
ISO 4406 20/18/15
Electrical Connection
DIN EN 175301-803 (K4)
Hydraulic Fluids
HL, HLP, HLPD, HVLP, HVLPD
Manual Override
Concealed (N9)
Max Flow
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Max Tank Port Pressure (t)
250 bar
Min Pilot Pressure (spring-centered)
14 bar
Mounting Screws
4x M10 x 60 ISO 4762
Mttfd
100 years
Nominal Size
NG16
Pilot Oil Configuration
T (X ext., T int.)
Port Pattern
ISO 4401-07-07-0-05
Screw Tightening Torque (m10)
58 Nm
Throttle Diameter
0.8 mm (B08)
1620 Old Apex Road
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