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.
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)
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
Unit weight:
  • 0.44 kg (0.97 lb)
Internal wetted surface area:
  • 335.5 cm² (52 in²)
PD12-S50_Perf_Chrt(2022-02-24)
PD12-S50_Dim_Dwg(2022-02-24)
Cavity:
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK12-S5X-MMMM (x = seal option)
PD12-S50_Order(2022-02-24)
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