4WEH16J7X/6EW110N9ETK4/B08 CSA

The 4WEH16J7X/6EW110N9ETK4/B08 CSA valve is manufactured by Bosch Rexroth within the WEH Directional Spool Valves series. It directs hydraulic flow in automation systems that require reliable on-off control of actuator circuits. The nominal size NG16 defines the interface dimensions and suits CETOP 07 subplates. A spool symbol J specifies the internal porting so that work ports are connected in the required pattern during each shift. The spring-centered return mechanism moves the spool back to its neutral position when pilot pressure is removed, preventing unintended motion. A maximum flow capacity of 300 l/min supports high-volume circuits without excessive pressure loss. The valve withstands up to 280 bar on ports P, A, and B, matching common industrial pressure ranges. An internal pilot oil supply marked ET removes the need for an external feed line, while an internal pilot return marked T routes pilot oil back to tank through the body. A minimum pilot pressure of 14 bar is needed to shift the spool.

Pilot pressure may be applied up to 250 bar, which safeguards the pilot stage against overstressing. Electrical connection is made through a DIN EN 175301-803 K4 plug, enabling quick replacement with standard cables. A concealed manual override identified as N9 allows local actuation during commissioning while reducing the risk of accidental operation in service. The porting pattern ISO 4401-07-07-0-05 aligns the valve with common manifold drillings for NG16 size. NBR seals are fitted so the valve can be used with mineral hydraulic oils within the stated temperature limits. A throttle insert with a 0.8 mm orifice meters the pilot flow to control shifting speed and damp pressure shocks. The spool offers three distinct positions, providing two working directions and one neutral state for cylinder relief. Four mounting screws M10 × 60 conforming to ISO 4762 secure the housing to the manifold and maintain sealing integrity under load.