4WHD10D3X/12

The 4WHD10D3X/12 directional spool valve is produced by Bosch Rexroth within the WHD Directional Spool Valves series and directs hydraulic oil to actuators in automated machinery. With a nominal size NG10, it fits mid-range circuits where moderate flow and fast switching are required. The subplate mounting pattern follows ISO 4401-05-04-0-05 so it aligns with common CETOP 05 manifolds, and the port face corresponds to DIN 24340-A10 to maintain interchangeability across equipment. A spool stroke of 5.5 mm defines the travel needed to uncover the flow paths, while a control volume of 3.83 cm³ moves through the pilot passages to shift the spool. The pilot stage accepts up to 100 bar control pressure, enabling reliable actuation from low-power solenoid or remote hydraulic signals. Main ports p, a, and b withstand 315 bar operating pressure, allowing the valve to sit directly in high-pressure supply lines. A maximum flow rate of 120 l/min lets it govern cylinders and motors without excessive pressure drop in production presses, injection machines, or similar installations.

For return circuits, the t port endures up to 160 bar, supporting back-pressure designs without risking case leakage. Hydraulic fluids with viscosities up to 500 mm²/s can be handled, which broadens the choice of oils for cold-start or high-temperature service. The valve functions at fluid temperatures as high as 80 °C and shares the same 80 °C ceiling for ambient conditions, enabling use in heated enclosures or near engines. Contamination limits are set to ISO 4406 class 20/18/15, so a filter rating near 25 µm absolute is advisable to protect the spool lands. The housing can be installed in any position, simplifying piping layouts on vertical or horizontal manifolds. Mounting uses two M6 × 40 bolts tightened to 9 Nm; this torque secures the body without distorting the seal plate. These mechanical, environmental, and cleanliness figures complement the hydraulic data introduced earlier and complete the information needed for system integration.