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Parker Hannifin Corporation
Open-Center Directional Control Valve
VO40
Catalog HY17-8505/UK
Specifications
Pressures
Inlet Port: 300 bar (4350 PSI)
Tank Port: 50 bar (725 PSI)
Work Ports: 300 bar (4350 PSI)
Flow Rates
(maximum
recommended)
40 LPM (10.6 GPM)
Internal Pilot
Pressure
Required for solenoids –
contact Parker
Spool Leakage
from work port
to tank
Max. 6 mL/min @172 bar (2500 PSI)
Oil temp. 50ºC (122ºF), and viscosity
40 cSt
Weights
Weights are approximate due to number of variations
available.
Inlet with relief 1.92 kg (4.2 lbs)
Outlet 1.88 kg (4.1 lbs)
Work section with reliefs and
manual actuator
1.93 kg (4.3 lbs)
Work section and manual actuator
without reliefs
1.98 kg (4.4 lbs)
Work Section, PO Checks with
manual actuator
2.1 kg (4.6 lbs)
Joystick assembly 0.8 kg (1.8 lbs)
Connections
Standard valves are available in 3/8" BSP (DIN 3852/2), SAE-6
or SAE-8 (J1926/1).
Connection Location SAE -8 SAE-6 BSP
P1, P2 Inlet ¾-16 UNF
>\zn-18 UNF C\,-19
T1, T2 Inlet ¾-16 UNF
>\zn-18 UNF C\,-19
P3 Outlet ¾-16 UNF
>\zn-18 UNF C\,-19
T3 Outlet ¾-16 UNF
>\zn-18 UNF C\,-19
PB1 Outlet ¾-16 UNF
>\zn-18 UNF C\,-19
Work Ports
Work
Sections
¾-16 UNF
>\zn-18 UNF C\,-19
GAGE
PORT
Inlet
M\zn-20 UNF M\zn-20 UNF
¼
PC
(Hyd. Conn.)
Work
Sections
M\zn-20 UNF M\zn-20 UNF
¼
PT
(Pneu.Conn.)
Work
Sections
Z\, NPT Z\, NPT Z\, NPT
Technical Information