4WP10G3X/12

The 4WP10G3X/12 spool valve belongs to the WP Pneumatic Spool Valves series and is produced by Bosch Rexroth. It directs pressure and return flow in automated hydraulic systems where remote pilot actuation is required. The valve size is 10, which matches mounting cavities designed for mid-capacity circuits. A porting pattern of ISO 4401-05-04-0-05 lets the unit interchange with other sub-plate mounted components. The maximum operating pressure of 350 bar allows the spool to handle high-pressure supply lines, and a maximum flow capability of 160 l/min determines the throughput the circuit can demand. Acceptable fluid viscosity spans from 2.8 to 500 mm²/s, so a wide range of mineral oils can be used without loss of control accuracy. The cleanliness class of 20/18/15 according to ISO 4406 establishes the filtration level needed to prevent spool sticking. Hydraulic fluid temperatures may reach 80 °C or fall to –20 °C when NBR seals are fitted, while ambient conditions can be up to 70 °C. The valve can be installed in any position, simplifying manifold layout.

Pilot operation parameters control shifting speed and reliability. A minimum pilot pressure of 8 bar is required to overcome spring and hydraulic forces, while the pilot stage tolerates up to 160 bar to accommodate boosted control lines. The dedicated pilot oil port uses a 7/16-20 UNF thread, so standard SAE fittings connect without adapters, and the internal pilot volume of 6.9 cm³ defines the quantity of oil that must be displaced during each actuation. Maintaining adequate pilot supply also safeguards response times, preventing delayed spool travel in fast-cycle presses and molding machines. Backpressure at the tank port may rise to 210 bar without affecting function, permitting long return lines or counterbalance valves downstream. The combination of generous pilot pressure capacity and moderate pilot volume lets the control circuit employ compact hoses without excessive pressure loss. These factors integrate with the main pressure and flow figures outlined earlier to give the 4WP10G3X/12 consistent switching performance across the full operating range.