PD12-S50
hydraforce.com
PILOTED DIRECTIONAL VALVE
Overview
Symbol
Description
The PD12-S50X is a screw-in, cartridge style, pilot operated, spool type,
hydraulic directional valve
Operation
In the neutral position flow is allowed between ports 2 and 3, while
blocking flow at port 4. On remote pilot signal at port 1 the valve shifts to
allow flow between ports 3 and 4, while blocking flow at port 2. The
spring chamber is vented to the tank through port 5. The vented spring
chamber allows the valve to be fully pressurized at ports 1, 2, 3 and 4
without affecting required pilot pressure. Pressure at port 5 will affect
required pilot pressure
Features
Hardened spool and cage for long life.
❍
Optional sealed pilot and spring chamber.
❍
Ratings
Pressure Ratings
Pressure rating
241 bar (3500 psi)
Flow Ratings
Flow rating
- Note: See performance graph
Maximum internal leakage
328 ml/min (20 in³/min) - Note: At 207 bar (3000 bar)
0 lpm (0 gpm) - Note: From port 1 to 2 with sealed spool
Temperature Ratings
Maximum operating fluid
temperature
-40 to 100 °C (-40 to 212 °F) - Note: With buna N seals
-26 to 204 °C (-15 to 400 °F) - Note: With fluorocarbon seals
-54 to 107 °C (-65 to 225 °F) - Note: With polyurethane seals
hydraforce.com
10/7/2020
PD12-S50
PD12-S50
hydraforce.com
PILOTED DIRECTIONAL VALVE
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)
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
0.44 kg (0.97 lb)
Internal wetted surface area
335.5 cm²; (52 in²;)
Performance
Dimensions
hydraforce.com
10/7/2020
PD12-S50
PD12-S50
hydraforce.com
PILOTED DIRECTIONAL VALVE
Materials
Materials
Cartridge: Weight: 0.375 kg (0.83 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
hydraforce.com
10/7/2020
PD12-S50
PD12-S50
hydraforce.com
PILOTED DIRECTIONAL VALVE
(3000 psi). Ductile iron bodies available; dimensions may differ.
Installation Specifications
Cavity
VC12-5
Cartridge installation torque
44.7 to 50.2 N-m (33 to 37 ft-lb)
Orientation restriction
None
Accessories
Seal kit
SK12-S5X-MMMM - Note: (x = seal option)
Housings
Order code
POSITION CODE DESCRIPTION
PD12-S50B-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
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 215 215 psi Bias Spring
hydraforce.com
10/7/2020
PD12-S50
PD12-S50
hydraforce.com
PILOTED DIRECTIONAL VALVE
hydraforce.com
10/7/2020
PD12-S50
