DIRECTIONAL VALVES
PD10-51 Piloted 3-Way Spool
DESCRIPTION
A screw-in, cartridge-style, pilot-operated, spool-type, hydraulic directional valve.
OPERATION
When in neutral the PD10-51 allows flow between ports 2, 3 and 4. On remote pilot
signal at 1, the valve’s spool shifts to block all ports. The spring chamber is vented to
the tank through port 5. The vented spring chamber allows the valve to be fully pres-
surized 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.
• 150 and 250 psi bias springs available.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Flow: 0–45 lpm (0–12 gpm); See Performance Chart
Internal Leakage at 241 bar (3500 psi): 164 ml/minute (10 cu. in./minute). Zero
leakage from port 1 to 2 with sealed spool.
Temperature: -40 to 120°C
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: VC10-5; See page 9.110.1
Cavity Tool: CT10-5XX; See page 8.600.1
Seal Kit: SK10-5X-BMMM; See page 8.650.1
ISO SYMBOL
PERFORMANCE
(Cartridge Only)
4.380.1
8.6/125
10.3/150
6.9/100
5.2/75
3.4/50
1.7/25
15.1
4
30.3
8
45.4
12
FLOW lpm/gpm
PRESSURE DROP bar/psi
- - - - 3 to 2 and 3 to 4
—— 3 to 2, 4
32 cSt/150 sus oil at 40°C
7.6
2
22.7
6
37.9
10
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
Cartridge: Weight: 0.23 kg. (0.5 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Ported Body: Weight: .41 kg. (0.85
lbs.); Anodized high strength 6061T6
aluminum alloy, rated to 207 bar
(3000 psi). See page 8.010.1
DIMENSIONS
MATERIALS TO ORDER
PD10-51
4.380.2
PD10-51 - __ - __ __ - __ __ __
Porting
Cartridge Only 0
SAE 6 6T
SAE 8 8T
Bias Spring
†
150 10.3 bar (150 psi)
230 15.9 bar (230 psi)
†
Note: 15.9 bar (230 psi) bias spring is
required for use with sealed spool.
TORQUE:
24-26 ft-lbs
(32.5-35.3 Nm) max.
INCH
MILLIMETRE
1.00
25.4
ACROSS
FLATS
1.36
34.5
2.62
66.5
5.00
127
1.48
37.6
2.00
50.8
1.99
50.6
4.38
111.3
0.75
19.1
1.17
29.7
3.06
77.7
5
4
4
3
2
2
1
1
5
3
0.34
8.7
4.00
101.6
0.19
4.8
3.63
92.1
®
HYDRAFORCE
HYDRAFORCE
.com
®
Seals
N Buna N (Standard)
V Fluorocarbon (Viton)
P Polyurethane
NS Buna N w/Sealed Spool 1 to 2 only
VS Fluorocarbon (Viton) w/Sealed Spool
1 to 2 only
PS Polyurethane w/Sealed Spool 1 to 2 only
Blue rectangles are links to other catalog pages.
