Valves - Directional Controls - Piloted Directional Valve - 2-position 2-way - Internal Vent - Normally Open

PD08-35

PILOTED DIRECTIONAL VALVE

Overview

Description

The PD08-35 is a screw-in, cartridge style, pilot-operated, spool type, normally open, hydraulic directional valve

Operation

In neutral position the valve allows flow from port 2 to 3. The spring bias chamber is internally vented to port 3. On remote pilot signal at port 1, the valve's spool shifts to block flow from port 2 to 3. Pressure on port 3 will directly (1:1) affect the pilot pressure required and must be added to the bias spring value

Features

  • External vent-to-atmosphere.
  • Range of bias springs available.
  • Sealed spool option for bias spring options 110.
  • Hardened spool and cage for long life.
  • Industry common cavity.
Pressure Ratings
Pressure rating:
  • 241 bar (3500 psi)
Flow Ratings
Flow rating:
  • 8.9 lpm (5 gpm)
Maximum internal leakage:
  • 65 ml/min (4 in³/min) At 241 bar (3500 psi)
  • 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 90 °C (-40 to 194 °F)
Unit weight:
  • 0.10 kg (0.22 lb)
Internal wetted surface area:
  • 103 cm² (16.0 in²)
PD08-35_Dim_Dwg

Materials

Cartridge: Weight: 0.10 kg (0.22 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces; Buna N seals standard.

Standard Ported Body : Weight: 0.36 kg (0.80 lb); Anodized high-strength aluminum alloy, rated to 207 bar (3000 psi). Ductile iron bodies available; dimensions may differ.

Cavity:
Cartridge installation torque:
  • 25.8 to 28.5 N-m (19 to 21 ft-lb)
Maximum allowable torque:
  • 47.6 N-m (35 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK08-3X-MM X = seal option
PD08-35_Order
POSITION
CODE
DESCRIPTION
PD10-35-H-J-R
H
Line Body
H
0
No Body
H
4T
Aluminum SAE 4
H
6T
Aluminum SAE 6
H
6TD
Ductile Iron SAE 6
H
8TD
Ductile Iron SAE 8
H
3B
Aluminum BSPP 3/8" (3)
H
3BD
Ductile Iron BSPP 3/8" (3)
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
20
20 psi Bias Spring
R
40
40 psi Bias Spring
R
60
60 psi Bias Spring
R
110
110 psi Bias Spring
R
170
170 psi Bias Spring