4WEH16M7X/6EW110N9DA

The 4WEH16M7X/6EW110N9DA directional valve belongs to the WEH Directional Spool Valves series produced by Bosch Rexroth for hydraulic automation tasks that require precise control of actuator movement. With a nominal size of 16 (NG16), this three-position spool unit identified by symbol M directs flow to ports P, A, and B or blocks them in neutral depending on the pilot signal. A maximum flow capability of 300 l/min supports cylinders and motors that demand high volume rates, while a rated operating pressure of 280 bar defines the allowable load pressure at the service ports. Subplate mounting enables quick replacement without disturbing rigid pipework, and an external pilot supply designated X separates the control oil from the main line so the logic circuit can be tuned independently of system pressure.

The pilot stage tolerates pressures up to 250 bar, permitting the valve to be driven from high-pressure control manifolds, yet it still shifts reliably once the pilot reaches the minimum spring-centered threshold of 14 bar. A pilot flow requirement of 35 l/min achieves the shortest switching time by rapidly filling the control chambers, and the external pilot return marked Y allows the signal oil to drain without mixing with tank flow. Back-pressure in that return path must remain below 160 bar to keep the spool responsive under dynamic duty. An ISO 4401-07-07-0-05 porting pattern aligns the valve body with common NG16 subplates, completing a package that integrates quickly into standardized manifolds.