PD12-S50 Piloted 3-Way Spool with Vented Spring (PD12-S50)
A screw-in, cartridge-style, pilot-operated, spool-type, hydraulic directional valve for three-way circuits requiring remote pilot actuation.
Product Operation
In neutral (unpiloted), the PD12-S50 allows flow from ➂ to ➁ bidirectionally, while flow is blocked at ➃On remote pilot signal at ➀, the valve shifts to open ➂ to ➃ while blocking ➁The spring chamber is vented to the tank through port ➄, which is, optionally, O-ring sealed from the cartridge flow paths. The vented spring chamber allows the valve to
be fully pressurized at ports ➀, ➁ and ➂ without affecting required pilot pressure. Pressure at ➄ will affect required pilot pressure.
Product Features
• Hardened spool and cage for long life.
• Optional sealed pilot and spring chamber.
Product Ratings
Maximum Operating Pressure: 241 bar (3500 psi)
Flow: See Performance Chart
Internal Leakage: 164 cc/minute (10 cu. in./minute) on all flow ports at maximum operating pressure. The sealed pilot version exhibits no leakage at ports ➀ and ➄ at maximum pressure.
Oil Volume Required to Full Shift: 1.07 cc (0.065 cu. in.)
Temperature: -40 to 120°C with standard Buna seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC12-S5; See page 9.112.1
Cavity Tool: CT12-S5; See page 8.600.1
Seal Kit: SK12-S5X-MMMM; See page 8.650.1
