Directional Valves

PD12-S50 — Piloted, 3-Way, Spool Valve, Vented Spring
  Selection guide - similar valves.
  PDF file of this page
  STP file for PD12-S50
  Request a quote

PD12-S50 Valve

SYMBOL:
PD12-S50 Valve symbol

DESCRIPTION
A screw-in, cartridge-style, pilot-operated, spool-type, hydraulic directional
valve for three-way circuits requiring remote pilot actuation.

OPERATION
In neutral (unpiloted), the PD12-S50 allows flow from 3 to 2 bidirectionally while
flow is blocked at 4. On remote pilot signal at 1, the valve shifts to allow flow
between 3 and 4 while blocking at 2. The spring chamber is vented to the tank
through port 5, which is, optionally, O-ring sealed from the cartridge flow paths.
The vented spring chamber allows the valve to be fully pressurized at ports
1, 2 and 3 without affecting required pilot pressure. Pressure at 5 will affect
required pilot pressure.

FEATURES
• Hardened spool and cage for long life.
• Optional sealed pilot and spring chamber.

RATINGS
Operating Pressure: 240 bar (3500 psi)
Flow: up to 94.5 lpm (25 gpm)
Maximum 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 1 and 5 at maximum pressure
Oil Volume Required to Full Shift: 1.07 cc (0.065 cu. in.)
Temperature: -40 to 100°C (-40 to 212°F) with Buna seals;
   -26 to 204°C (-15 to 400°F) with fluorocarbon 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_5w
Cavity Tool: CT12-S5xx; See page 8.600.1
Seal Kit: SK12-S5x-MMMM; See page 8.650.1

PERFORMANCE:

PD12-S50 Valve Performance Chart
  DIMENSIONS:
PD12-S50 Valve Dimensions

MATERIALS:

Cartridge: Weight: 0.375 kg (0.83 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups standard.

Standard Ported Body:
Weight: 1.5 kg (3.3 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi). Ductile iron bodies available; dimensions may differ.
See page 8.012.1_5w
  ORDERING CHART:

PD12-S50 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for PD12-S50. Request a quote.