4WE6D6X/EW110N9/62 SO43A-1221B

The 4WE6D6X/EW110N9/62 SO43A-1221B directional spool valve is produced by Bosch Rexroth for the WE Directional Spool Valves series and routes hydraulic flow for automation tasks. Its nominal size of 6 keeps the envelope small while matching ISO 4401-03-02-0-05 porting, so it fits common sub-plates without adapters. NFPA D03 mounting further standardizes installation across North-American manifolds. The valve handles up to 60 l/min, allowing medium-capacity circuits to cycle cylinders at practical speeds, and ports A, B, and P can each be pressurized to 350 bar for high-force motion. The tank port withstands up to 160 bar, permitting back-pressure where return-line restrictions exist. Because the installation position can be any, designers can orient the body horizontally or vertically to suit piping layouts. Oil cleanliness must remain at ISO 4406 20/18/15 to protect the precision spool from wear. A concealed N9 manual override lets technicians shift the spool during commissioning, and the spool is secured with an ISO 8752-3x8-St locking pin.

An integrated high-power wet-pin solenoid supplies the actuation force required for fast spool movement. The coil is rated for 110 V on an AC 50/60 Hz supply, so it connects directly to standard machine control transformers. Electrical stress is limited by a 500 V maximum switch-off overvoltage, which protects upstream relays and wiring. During continuous duty the coil surface may reach 120 °C; cabinet ventilation must therefore ensure neighboring components stay within their limits. Power loss to the valve does not expose live metal, because the manual override remains hidden under the end cover. The wet-pin design keeps the armature submerged in oil, improving heat transfer and extending service life. A single ISO 8752-3x8-St locking pin holds the solenoid tube, maintaining alignment even under vibration.