Directional Valves

PD10-34 — Piloted, 2-Way, Spool, External Vent, Normally Closed
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PD10-34 Valve

SYMBOL:
PD10-34 Valve symbol
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 PD10-34 blocks flow from 2 to 3 bidirectionally. ‘V’ is a spring
chamber vent-to-atmosphere, which is internally O-ring sealed from the cartridge
flow paths.
On remote pilot signal at 1, the valve shifts to open 2 to 3 bidirectionally. Because of the
vented spring chamber, the cartridge may be fully pressurized at any port without affecting
required pilot pressure.

FEATURES
• External vent-to-atmosphere.
• Range of bias springs available.
• Sealed spool option for bias spring options 110, 130 and 170.
• Hardened spool and cage for long life.
• Industry common cavity.

RATINGS
Operating Pressure: 240 bar (3500 psi)
Proof Pressure: 390 bar (5700 psi)
Flow: up to 38 lpm (10 gpm)
Maximum Internal Leakage at 207 bar (3000 psi): 82 cc/minute (5 cu. in./minute)
Pilot Pressure Required to Full Spool Shift:
   for 4.1 bar (60 psi) spring: 4.7 bar (68.2 psi)
   for 7.6 bar (110 psi) spring: 8.6 bar (125 psi)
Oil Volume Required to Full Shift: 0.65 cc (0.04 cu. in.)
Temperature: -40 to 100°C (-40 to 212°F) with Buna seals;
   -26 to 204°C (-15 to 400°F) with fluorocarbon seals;
   -54 to 107°C (-65 to 225°F) with polyurethane 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: VC10-3; See page 9.110.1_3w
Cavity Tool: CT10-3xx; See page 8.600.1
Seal Kit: SK10-3x-MM; See page 8.650.1
Cap Vent Seal: 6003117

Note: This valve is designed with a dynamic oil-to-atmosphere seal in the vent
section. Ambient conditions will cause this vent seal to degrade which will reduce the
valve’s cycle life. If this could cause a problem, we suggest that a non-vented model
be selected, or special seal be used. Consult factory for assistance.

 

PERFORMANCE:

PD10-34 Flow vs Pressure

 

DIMENSIONS:

PD10-34 Valve Dimensions

 

MATERIALS:

Cartridge: Weight: 0.15 kg (0.34 lb);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces; Buna N
O-rings and polyester elastomer back-ups
standard.

Standard Ported Body:
Weight: 0.36 kg (0.80 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar
(3000 psi). Ductile iron bodies available; dimensions may differ. See page 8.010.1_3w.

 

ORDERING CHART:

PD10-34 Ordering Chart