4WEH32HD6X/6EW110N9DAL

The 4WEH32HD6X/6EW110N9DAL valve belongs to the WEH Directional Spool Valves series and is produced by Bosch Rexroth. It directs hydraulic flow in automated circuits through electro-hydraulic actuation, so an electrical pilot signal drives the main spool without manual effort. The unit is built in size NG32, providing a port capacity suited for large machine actuators. A porting pattern that conforms to ISO 4401-10-09-0-05 lets it fit standard subplates and manifolds. The spool carries symbol D and offers two discrete positions, allowing operators to alternate between two flow paths for extend or retract functions. Hydraulic energy returns the control spool to its neutral location, eliminating the need for external springs. A minimum pilot pressure of 5 bar is required to shift the spool, while a pilot flow of 45 l/min at the shortest switch time supports rapid response in cyclic operations. These characteristics make the valve useful where fast yet reliable directional changes are necessary.

System ratings permit a maximum operating pressure of 350 bar on the P, A, and B ports, so the valve can serve high-pressure cylinders and motors without exceeding component limits. Pilot circuits may reach up to 250 bar, providing sufficient force to move the spool under load. Acceptable hydraulic media viscosity spans from 2.8 to 500 mm²/s, ensuring consistent function with thin startup oils or thicker fluids at low temperatures. The fluid temperature range of −20 °C to +80 °C keeps seals within their material limits during cold starts and sustained warm running. Cleanliness should meet ISO 4406 class 20/18/15 to prevent abrasive wear on the precision-ground lands. These limits help maintain smooth metering edges and extend service life. Together the pressure, temperature, viscosity, and cleanliness requirements define the operating envelope that technicians must observe when integrating the 4WEH32HD6X/6EW110N9DAL into automated hydraulic motion controls.