Valves - Directional Controls - Piloted Directional Valve - 2-position 3-way

PD12-S50

PILOTED DIRECTIONAL VALVE

Overview

Description

The PD12-S50X is a screw-in, cartridge style, pilot operated, spool type, hydraulic directional valve

Operation

In the neutral position flow is allowed between ports 2 and 3, while blocking flow at port 4. On remote pilot signal at port 1 the valve shifts to allow flow between ports 3 and 4, while blocking flow at port 2. The spring chamber is vented to the tank through port 5. The vented spring chamber allows the valve to be fully pressurized at ports 1, 2, 3 and 4 without affecting required pilot pressure. Pressure at port 5 will affect required pilot pressure

Features

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

Ratings

Pressure Ratings
Pressure rating:
  • 241 bar (3500 psi)
Flow Ratings
Flow rating:
  • See performance graph
Maximum internal leakage:
  • 328 ml/min (20 in³/min) At 207 bar (3000 bar)
  • 0 lpm (0 gpm) From port 1 to 2 with sealed spool
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N seals
  • -26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
  • -54 to 107 °C (-65 to 225 °F) With polyurethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
Other Ratings
Corrosion protection:
  • 960 hr salt spray per astmb117 (gpd12-41x)

Operating Parameters

Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 20/18/14 per ISO 4406

Properties

Unit weight:
  • 0.44 kg (0.97 lb)
Internal wetted surface area:
  • 335.5 cm² (52 in²)

Performance

PD12-S50_Perf_Chrt

Dimensions

PD12-S50_Dim_Dwg

Materials

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.

Installation Specifications

Cavity:
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
Orientation restriction:
  • None

Accessories

Seal kit:
  • SK12-S5X-MMMM (x = seal option)

Order Code

POSITION
CODE
DESCRIPTION
PD12-S50B-H-J-R
B
Spool Option
B
BLANK
Standard
B
N
Normally Open in Transition
H
Line Body
H
0
No Body
H
10T
Aluminum SAE 10
J
Seal
J
N
Buna-N
J
NS
Buna-N with a Sealed Spool
J
V
Fluorocarbon
J
VS
Fluorocarbon with a Sealed Spool
J
P
Polyurethane
J
PS
Polyurethane with a Sealed Spool
J
U
PPDI Urethane
J
US
PPDI Urethane with a Sealed Spool
R
Spring
R
110
110 psi Bias Spring
R
215
215 psi Bias Spring
PD12-S50_Order