H-4WEH32E6X/6EW110N9TDAL

The H-4WEH32E6X/6EW110N9TDAL valve is produced by Bosch Rexroth for the WEH Directional Spool Valves series and regulates hydraulic actuators in automated machinery. Its NG32 size provides adequate porting for a maximum flow of 1100 l/min, allowing high-capacity circuits to operate without excessive pressure drop. The 4-way configuration directs pressure and return lines to two work ports, while spool symbol E defines the internal flow paths used during each command state. A three-position, spring-centered spool automatically returns to neutral when the solenoids are de-energized, maintaining safety and stopping motion. Pilot oil is supplied externally through port X so the control pressure can be kept independent of the main line, and the pilot oil returns internally to port T to reduce external hoses and simplify installation.

The main ports P, A, and B tolerate operating pressures up to 350 bar, enabling the valve to handle heavy-duty actuators and cylinders. The pilot stage functions over a minimum pressure of 8.5 bar, guaranteeing reliable shifting even in low-pressure standby conditions. Internal pilot return pressure may rise to 160 bar in AC-operated systems, so the return gallery is reinforced accordingly, and port T can be loaded to 250 bar without damaging the housing. Each shift consumes 29.4 cm³ of pilot oil, a volume that must be considered when sizing the control pump and accumulator for rapid cycling. Together these pressure limits and pilot data define the operating envelope and ensure consistent performance in hydraulic automation.