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

PD42-S50

PILOTED DIRECTIONAL VALVE

Overview

Description

The PD42-S50X is a screw-in, cartridge style, pilot-operated, spool type hydraulic directional valve

Operation

In neutral position the valve allows flow from port 2 to port 3 bidirectionally, while port 4 is blocked. On remote pilot signal at port 1, the valve's spool shifts to allow flow from port 3 to port 4, while blocking flow to port 2. Since port 5 is common to the spring chamber, pressure on port 5 will directly (1:1) affect the pilot pressure required and must be added to the bias spring value

Features

  • Hardened spool and cage for long life.
  • Optional open transition for ports 2, 3 and 4.
Pressure Ratings
Pressure rating:
  • 345 bar (5000 psi)
Flow Ratings
Flow rating:
  • See performance graph
Maximum internal leakage:
  • 245 ml/min (15 in³/min) At 345 bar (5000 psi)
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 and urethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
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:
  • 1.6 kg (3.4 lb)
Internal wetted surface area:
  • 794 cm² (123 in²)
PD42-S50_Perf_Chrt
PD42-S50_Dim_Dwg

Materials

Cartridge: Weight: 1.60 kg (3.5 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N O-rings and polyester elastomer back-ups standard.

Ported Body: Consult factory.

Cavity:
Cartridge installation torque:
  • 88.1 to 101.7 N-m (65 to 75 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK42-S5N-BMMM (buna-n) Buna-n
  • SK42-S5V-BMMM Fluorocarbon
  • SK42-S5P-BMMM Polyurethane
  • SK42-S5U-OOOO Urethane
PD42-S50_Order
POSITION
CODE
DESCRIPTION
PD42-S50B-H-J-R
B
Spool Option
B
BLANK
Standard
B
N
Normally Open in Transition
H
Line Body
H
0
No Body
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
100
100 psi Bias Spring
R
190
190 psi Bias Spring