4WEH22E7X/6EG24N9ES2K4/B10

The 4WEH22E7X/6EG24N9ES2K4/B10 directional spool valve is produced by Bosch Rexroth within the WEH Directional Spool Valves series. It directs hydraulic oil in automated machinery where accurate positioning and rapid reversal are required. A valve size of NG25 provides flow passages matched to mid-range power units. The spool can pass up to 450 l/min under symbol E, supporting high cycle rates. Ports P, A, and B withstand 280 bar, letting the valve operate in high pressure circuits. Three spring-centered positions return the spool to neutral when pilot pressure is lost, preventing unintended motion. Spool designation E blocks all ports in center while supplying either service line when shifted. A high-power 6E pilot control valve supplies the actuating force required for fast, repeatable shifts. The solenoid operates from a 24 V DC supply common to industrial control cabinets. A concealed N9 manual override allows manual movement of the spool for setup or emergency service. The B10 throttle insert restricts pilot flow to limit switching shock and noise. Mounting uses the ISO 4401-08-08-0-05 pattern, allowing direct installation on standardized subplates.

The pilot circuit accepts pressure up to 210 bar, yet reliable actuation begins once 10.5 bar is reached, giving designers a wide control range. Port T endures 250 bar return pressure, so the valve can discharge into back-pressure-loaded reservoirs or counterbalance circuits without damage. Switching dynamics are tuned with the S2 adjustment, enabling on-site alignment of opening and closing times to match cylinder mass and load. An MTTFd of 100 years indicates very low probability of dangerous failure during typical service life, supporting safety category calculations. System cleanliness must meet ISO 4406 class 20/18/15, because excessive particles can erode the spool lands and shorten service life. When the stated pilot limits and fluid cleanliness are respected, the valve maintains stable flow control even under continuous duty. These capabilities make the 4WEH22E7X/6EG24N9ES2K4/B10 a dependable directional element in presses, molding machines, and other automated hydraulic equipment. Together, the pressure ratings and adjustable timing features provide predictable motion control without external flow restrictors.