Bosch Rexroth | 4WEH16R7X6EW110N9ETK4B10-CSA
4WEH16R7X/6EW110N9ETK4/B10 CSA
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The 4WEH16R7X/6EW110N9ETK4/B10 CSA valve is manufactured by Bosch Rexroth for the WEH Directional Spool Valves series. It directs hydraulic flow in automated circuits and supports four ports with three switching positions, so it is a 4/3-way unit intended for pressure and return control. The nominal size is NG16, enabling line sizes common to medium-capacity machines. A maximum flow rate of 300 l/min allows the spool to feed high-demand actuators, while ports P, A, and B withstand operating pressures up to 280 bar. Pilot control oil is drawn internally from the P line and returned internally to T, simplifying external plumbing. The pilot stage tolerates pressures up to 250 bar and requires at least 14 bar to shift the spring-centered spool reliably. These characteristics make the valve suitable for compact manifolds where space and external pilot piping are limited.
Panel mounting follows the ISO 4401-07-07-0-05 pattern, allowing interchange with other size-07 CETOP subplates. Electrical actuation is connected through a DIN EN 175301-803 plug, and a concealed manual override lets maintenance staff shift the spool without energizing the solenoid. For quick response the pilot stage must receive 35 l/min, and its three-position spring-centered design displaces 5.72 cm³ of pilot oil per cycle. A throttle insert with a 1.0 mm orifice designated B10 can be fitted to limit flow and damp switching shocks. Acceptable oil viscosity ranges from 2.8 to 500 mm²/s, and fluid cleanliness should meet ISO 4406 class 20/18/15 to protect the precision edges.
Technical Specifications
Electrical Connection
DIN EN 175301-803
Fluid Cleanliness
ISO 4406 20/18/15
Manual Override
Concealed
Max Flow
300 l/min
Max Operating Pressure (p, A, B)
280 bar
Max Pilot Pressure
250 bar
Min Pilot Pressure (3-pos, Spring)
14 bar
Mounting Pattern
ISO 4401-07-07-0-05
Nominal Size
NG16
Pilot Flow For Fastest Switching
35 l/min
Pilot Oil Return
Internal (T)
Pilot Oil Supply
Internal (P)
Pilot Volume (3-pos, Spring)
5.72 cm3
Throttle Insert
Ø 1.0 mm (B10)
Viscosity Range
2.8–500 mm²/s
Way Configuration
4/3-Way
1620 Old Apex Road
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