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

PD12-41

PILOTED DIRECTIONAL VALVE

Overview

Description

The PD12-41X is a screw-in, cartridge style, pilot operated, spool-type hydraulic directional valve.

Operation

In neutral position the valve allows flow from port 3 to 4 bidirectionally, while port 2 is blocked. On remote pilot signal at port 1 the valve shifts to open from 3 to 2, while blocking flow to port 4. Since port 4 is common to the spring chamber, pressure on port 4 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.
  • 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 viton 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:
  • 0.41 kg (0.91 lb)
Internal wetted surface area:
  • 310 cm² (48.0 in²)
PD12-41_Perf_Chrt(2022-02-24)
PD12-41_Dim_Dwg(2022-02-24)
Cavity:
Cartridge installation torque:
  • 44.7 to 50.2 N-m (33 to 37 ft-lb)
Maximum allowable torque:
  • 102 N-m (75 ft-lb)
Orientation restriction:
  • None. (reference all sheets) all dimensions are for reference only. D:3.3 m:3.3 1-1/16-12 un-2a thread 1.25 31,7 [ ] across flats aluminum body shown inch [mm]
Seal kit:
  • SK12-4X-MMM X = seal option
PD12-41_Order(2022-02-24)

Model Options

PD12-41B-H-J-R
B Spool Option
CODE
DESCRIPTION
BLANK
Standard
N
Normally Open in Transition
H Line Body
CODE
DESCRIPTION
0
No Body
10T
Aluminum SAE 10
12T
Aluminum SAE 12
12TD
Ductile Iron SAE 12
J Seal
CODE
DESCRIPTION
N
Buna-N
NS
Buna-N with a Sealed Spool
V
Fluorocarbon
VS
Fluorocarbon with a Sealed Spool
P
Polyurethane
PS
Polyurethane with a Sealed Spool
U
PPDI Urethane
US
PPDI Urethane with a Sealed Spool
R Spring
CODE
DESCRIPTION
60
60 psi Bias Spring
110
110 psi Bias Spring
170
170 psi Bias Spring