4WE6Y6X/EG12N2K4K

The 4WE6Y6X/EG12N2K4K directional spool valve is part of the WE Directional Spool Valves series from Bosch Rexroth and directs hydraulic flow in automated machinery. With size 6 geometry, the body fits compact manifolds while still providing adequate port area. A 4-way flow path lets the device alternate supply and return lines to a double-acting actuator. Spool symbol Y governs overlap so that flow transitions occur with reduced pressure shock. The mounting pattern follows ISO 4401-03-02-0-05, allowing direct installation on standard subplates. Actuation comes from a wet-pin solenoid with a detachable coil, which speeds coil replacement during service. The coil runs on 12 V DC for compatibility with low-voltage vehicle and mobile equipment supplies. A rated current of 2.5 A must be delivered by the driver to ensure full magnetic force. Electrical termination is through a DIN EN 175301-803 K4K connector that locks with a central screw. An IP67 enclosure protects the coil assembly against dust ingress and temporary immersion.

The hydraulic section tolerates operating pressure up to 350 bar at ports p, a, and b, enabling control of high-pressure circuits such as presses or steering systems. Port t can accept tank pressure to 210 bar in direct-current service, supporting load-holding functions that return oil through restrictive lines. A maximum flow of 80 l/min keeps velocity within the lands without excessive pressure drop. A small mushroom-style manual override permits local shifting when electrical power is unavailable. That override can be used only while tank pressure remains below 50 bar to avoid damaging the button seal. Incoming oil must meet ISO 4406 cleanliness class 20/18/15 so the spool slides freely without scoring. The coil insulation withstands switch-off overvoltage up to 500 V, preventing arc damage when the driver releases current. These pressure, flow, and electrical limits rely on correct subplate mounting and sealing practices. Together they define safe operating boundaries for automated hydraulic motion control.