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

PD12-42

PILOTED DIRECTIONAL VALVE

Overview

Description

The PD12-42X is a screw-in, cartridge style, pilot operated, spool-type hydraulic directional valve

Operation

In neutral position the valve allows flow from ports 3 to 2, while port 4 is blocked. On remote pilot signal at port 1 the valve shifts to open from 3 to 4, while blocking flow to port 2. Since port 4 is common to the spring chamber, pressure on port 4 will directly affect the pilot pressure required and must be added to the bias spring value

Features

  • Hardened spool and cage for long life.
  • Cost-effective cavity.
Pressure Ratings
Pressure rating:
  • 241 bar (3500 psi)
Flow Ratings
Flow rating:
  • See performance graph
Maximum internal leakage:
  • 245 ml/min (15 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:
  • 0.42 kg (0.93 lb)
Internal wetted surface area:
  • 309.7 cm² (48 in²)
PD12-41_Perf_Chrt
PD12-41_Dim_Dwg

Materials

Cartridge: Weight: 0.28 kg. (0.61 lbs.); 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 lbs.); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi). Ductile iron bodies available; dimensions may differ.

Cavity:
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
Maximum allowable torque:
  • 101.7 N-m (75 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK12-4X-MMM Buna N
  • SK12-4V-MMM Fluorocarbon
  • SK12-4P-MMM Polyurethane
PD12-42_Order
POSITION
CODE
DESCRIPTION
PD12-42B-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
H
12T
Aluminum SAE 12
H
12TD
Ductile Iron SAE 12
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
60
60 psi Bias Spring
R
110
110 psi Bias Spring
R
170
170 psi Bias Spring