Screw-in, cartridge-style, pilot-operated, spool-type, hydraulic directional valve for three-way circuits requiring remote hydraulic pilot actuation.
In neutral (unpiloted) position the PD42-M40X allows flow passage from port 3 to port 2 bidirectionally, while flow is blocked at port 4. "v" is a spring chamber vent-to-atmosphere, which is internally o-ring sealed from the cartridge flow paths. On remote pilot signal at port 1, the valve shifts to open port 3 to port 4, while blocking port 2. The vented aping chamber allows PD42-M40X to be fully pressurized at any port without affecting required pilot pressure.
- Hardened spool and cage for long life. Optional sealed pilot Industry-common ISO cavity.