DIRECTIONAL VALVES
DESCRIPTION
A screw-in, cartridge-style, pilot-operated, spool-type, normally closed, hydraulic
directional valve for two-way circuits requiring remote pilot actuation.
OPERATION
In neutral (unpiloted), the PD12-32 blocks fl ow from ➂ to ➁ bidirectionally.
The spring bias chamber is internally vented to
➂.
On remote pilot signal at
➀, the valve shifts to open ➁ to ➂ unidirectionally.
FEATURES
• Hardened spool and cage for long life.
• Industry common cavity.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Flow: See Performance Chart
Internal Leakage: 82 cc/minute (5 cu. in./minute) max. at 207 bar (3000 psi)
Pilot Pressure Required: To Full Spool Shift for 7.6 bar (110 psi) spring:
8.6 bar (125 psi)
Oil Volume Required to Full Shift: 1.32 cc (0.08 cu. in.)
Temperature: -40 to 120°C with standard Buna seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC12-3; See page 9.112.1
Cavity Tool: CT12-3XX; See page 8.600.1
Seal Kit: SK12-3X-MM; See page 8.650.1
SYMBOLS
USASI: ISO:
PERFORMANCE (Cartridge Only)
4.317.1
12.4/180
9.3/135
6.2/90
3.1/45
22.7
6
45.4
12
90.8
24
FLOW lpm/gpm
PRESSURE DROP bar/psi
113.6
30
68.1
18
to
32 cSt/150 ssu oil at 40°C
➁➂
PD12-32 Piloted 2-Way Spool, Normally Closed,
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DIMENSIONS
Cartridge: Weight: 0.23 kg. (0.50 lbs.)
Steel with hardened work surfaces;
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
1.13 kg. (2.50 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.012.1.
TO ORDER
PD12-32
4.317.2
Porting
Cartridge Only 0
SAE 8 8T
SAE 10 10T
SAE 12 12T
1/2 in. BSP* 4B
3/4 in. BSP* 6B
*BSP Body
U.K. Mfr. Only
Bias Spring
110 7.6 bar (110 psi)
170 11.7 bar (170 psi)
PD12-32 - __ __ __ - __ -__ __ __
Internal Vent
Seals
N Buna N (Std.)
NS Buna N with Sealed Spool
V Fluorocarbon
VS Fuorocarbon with Sealed Spool
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MATERIALS
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