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

PD12-45

PILOTED DIRECTIONAL VALVE

Overview

Description

The PD12-45 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 3 bidirectionally. On remote pilot signal at port 1, the valve's spool shifts to block flow from port 2 to 3. The spring chamber is vented to port 4 which is internally o-ring sealed from the cartridge flow paths. 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.

Ratings

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
Maximum 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)
Storage temperature
-40 to 70 °C (-40 to 160 °F)

Operating Parameters

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

Properties

Cartridge weight
0.42 kg (0.92 lb)
Internal wetted surface area
343 cm² (53.18 in²)

Performance

PD12-44_Perf_Chrt

Dimensions

PD12-41_Dim_Dwg

Materials

Materials

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

Installation Specifications

Cavity
VC12-4
Cartridge installation torque
44.7 to 50.2 N-m (33 to 37 ft-lb)
Orientation restriction
None

Accessories

Seal kit
SK12-4X-MMM X = seal option

Order code

POSITION
CODE
DESCRIPTION
PD12-45-H-J-R
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
110
110 psi Bias Spring
R
170
170 psi Bias Spring
PD12-45_Order