H-4WEH16E7X/6EG24K4QM0G24

The H-4WEH16E7X/6EG24K4QM0G24 directional valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth for routing pressurized fluid in automated hydraulic circuits. It fits an NG16 size mounting interface, which determines the port pattern and supports the rated flow. The 4-way design provides two work ports, a pressure port, and a return port so that cylinder or motor direction can be switched. A spool identified by symbol E shapes the internal flow passages, and three discrete spool positions give a center condition in addition to the two service positions. A spring-centered return mechanism repositions the spool to neutral when the solenoid is de-energized, maintaining predictable fail-safe behavior. Rest-position monitoring is included to report that the spool has returned to its neutral location for feedback into the control system. The valve passes up to 300 l/min, enabling high-flow actuators to be driven without undue pressure drop. The housing withstands system pressures to 350 bar, making it suitable for heavy-duty industrial installations.

External pilot oil supply marked X isolates the control flow from the main pressure line, while an external return port Y allows the pilot fluid to drain without affecting tank pressure. The pilot stage operates reliably when at least 14 bar is present and remains protected by a maximum pilot pressure limit of 250 bar. A 24 V DC solenoid energizes the pilot spool, matching common machine control voltages and simplifying wiring. The coil is connected through a DIN EN 175301-803 type K4 plug, giving a sealed and standardized electrical interface. Fastening screws must be tightened to 58 Nm to secure the valve body to its sub-plate and prevent leakage. Hydraulic cleanliness should not exceed ISO 4406 code 20/18/15 to maintain sealing and spool precision. Together these installation and operating limits ensure dependable service life in demanding automation systems.