Parker Hannifin VO40 User Manual
VO40 Open-Center
Directional Control
Valve
Catalog HY17-8505/UK
April 2007
Catalog HY17-8505/UK
Open-Center Directional Control Valve
VO40
!
WARNING
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS AND/OR SYSTEMS DESCRIBED
HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.
This document and other information from Parker Hannifin Corporation, its subsidiaries and authorized distributors provide
product and/or system options for further investigation by users having technical expertise. It is important that you analyze all
aspects of your application, including consequences of any failure, and review the information concerning the product or system in the current product catalogue. Due to the variety of operating conditions and applications for these products or systems,
the user, through its own analysis and testing, is solely responsible for making the final selection of the products and systems
and assuring that all performance, safety and warning requirements of the application are met.
The products described herein, including without limitation, product features, specifications, designs, availability and pricing, are
subject to change by Parker Hannifin Corporation and its subsidiaries at any time without notice.
Offer of Sale
Please contact your Parker representation for a detailed ”Offer of Sale”.
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Parker Hannifin Corporation
Catalog HY17-8505/UK
Contents
Introduction .............................................................................................................................................................1
Technical Information
General Description ..........................................................................................................................................3
Operation ..........................................................................................................................................................3
Benefits ............................................................................................................................................................3
Specifications ...................................................................................................................................................4
Weights .............................................................................................................................................................4
Connections .....................................................................................................................................................4
Performance Curves .........................................................................................................................................5
Environmental Characteristics ..........................................................................................................................5
Open-Center Directional Control Valve
VO40
Schematic Circuit Types ...................................................................................................................................6
Dimensions ....................................................................................................................................................7-8
Handle Actuation vs. Spool Direction ...............................................................................................................9
Ordering Information
How to Order ..................................................................................................................................................10
General Valve Assembly .................................................................................................................................11
Inlet Cover .................................................................................................................................................12-13
Outlet Cover ..............................................................................................................................................14-15
Work Sections ...........................................................................................................................................16-20
Mid-Inlet ..........................................................................................................................................................21
Assembly Configuration Form ............................................................................................................................22
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Parker Hannifin Corporation
Catalog HY17-8505/UK
Open-Center Directional Control Valve
VO40
Conversion factors
1 kg = 2.2046 lb
1 N = 0.22481 lbf
1 bar = 14.504 psi
1 l = 0.21997 UK gallon
1 l = 0.26417 US gallon
1 cm3 = 0.061024 in
1 m = 3.2808 feet
1 mm = 0.03937 in
9/5 °C + 32 = °F
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Parker Hannifin Corporation
Catalog HY17-8505/UK
Introduction
Breadth of Line
Parker Hannifin is a Fortune 500
company with sales of $9 billion
and over 400,000 customers in 43
countries. Parker is the world’s
leading supplier of motion control
components and system solutions
serving the mobile, industrial
and aerospace markets.
Parker is your single source
for any hydraulic valve requirement. We provide a wide selection
of open-center and load-sense
directional control valves for any
construction, off-highway, or onhighway application. Many of our
open-center valves can be adapted
and used as closed-center, constantpressure, and constant-pressure
unloaded valves. Each of these
technologies offers unique features
for improved machine performance
over traditional, open-center control
valves.
Open-Center Directional Control Valve
VO40
When remote control is required,
Parker provides a broad line of
pilot controllers that are compact
and pressure-matched with our
control valves to provide consistent
and optimized machine control.
There are a variety of electricswitch handle options available
for additional function control by
the operator.
Parker’s premier IQAN electronics packages range from simple
stand-alone controllers to large,
multiple CAN bus systems with
color displays. For example, IQAN
interfaces with new electronic
diesel engines over the SAE J1939
CAN bus.
Package components are
designed and tested for
mobile applications to
help increase machine
uptime. The IQAN valve drivers
offer superior control of proportional hydraulic functions resulting
in increased machine productivity.
Non-programmers find IQAN’s
programming interface easy to use,
reducing development time. Furthermore, excellent diagnostic tools
and remote modem connection help
cut field service time.
Total Machine
Motion Control
You can turn to us for all your
mobile motion control solutions.
We offer stand-alone valves, as well
as custom-designed manifolds with
integrated directional control valves.
No matter what type of system you
choose, Parker solutions provide
top-notch performance and reliability. Our systems are optimized
to reduce complexity, size, cost, and
fluid leakage. Therefore, working
with Parker can significantly cut
your machine-build time.
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Parker Hannifin Corporation
Catalog HY17-8505/UK
Introduction
State-of-the-Art
Manufacturing
Parker is committed to using lean
manufacturing to eliminate waste
while streamlining processes.
Lean technology helps us meet
customer request dates quickly
and cost-effectively. We also rely
on state-of-the-art equipment and
technology, such as computeraided machining, to ensure
product quality.
We regularly invest in our ISO 9001
certified manufacturing facilities
because we are committed to
meeting all international standards
for safety and quality. The hydraulic
valves we manufacture comply with
relevant ISO, CSA, CE, and AMEX
standards.
In addition, Parker hydraulic valves
and valve manifolds are fully tested
and certified before being released
to the customer. You can expect
Parker hydraulic valves to work the
first time, every time.
Open-Center Directional Control Valve
VO40
Customer Service
with A Global Reach
Parker’s worldwide network of field
sales engineers and Mobile Systems
Engineers (MSEs) are the best in
the business. A field sales engineer
works closely with you, acting as a
single point of contact to evaluate
applications and design solutions.
MSEs support field sales efforts by
managing difficult design problems
and complex circuit design.
You also benefit from Parker
Mobile Technology Centers
(MTCs) that are staffed by specially
trained distributors who provide
only the highest levels of customer
service. These one-stop shops offer
complete hydraulic systems design
for mobile applications, as well as
technology services such as diagnostics, troubleshooting, computer
design, testing, and integration of
electronic controls.
Finally, our thousands of dependable distributors are strategically
located in your markets. They carry
inventory to meet specific, local
market needs, and they ensure that
products arrive when and where
they are needed. You can count on
Parker distributors to minimize
downtime.
To locate your nearest distributor
for the latest information on the
VO40 Directional Control Valve, or
our entire mobile valve line-up, visit
us at www.parker.com/eurohyd.
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Parker Hannifin Corporation
Catalog HY17-8505/UK
Technical Information
General Description
The VO40 is an open-center directional control valve
with the flexibility of sectional construction. Consistent with this technology, it is simple in its application,
reliable, easy to troubleshoot, and cost effective. The
global design reflects the performance and quality expected by today’s machine designers. Spools have metering notches in the three critical areas – open- center,
parallel path and tank, which optimizes simultaneous
metering. Contemporary honing technology is used to
deliver low work port to tank leakage. Additionally, each
work section has a transition check to ensure that a
load does not “dip” during simultaneous operation. All
of these features, plus those listed below, were intended to take machine controllability to the next level.
Operation
The VO40 incorporates traditional open-center technology. It is usually interfaced with a constant flow pump,
whose flow is routed directly to tank when the spools
are in neutral. When one or more spools are selected,
flow is directed to the actuators. The throttling of that
flow depends upon the spool position and the design of
the metering notches. Spool notches can be designed
to accommodate resistive loads (meter-in) and negative loads (meter-out). To accommodate multiple pump
circuits, split flow and combined flow mid inlets are
available.
Open-Center Directional Control Valve
VO40
Benefits
Enhanced metering – especially during simultaneous
•
operation, this is accomplished by having notches in the
three critical areas of the spool: open center, parallel path
and tank.
Improved simultaneous metering – having a transition
•
check in each work section ensures that a load does not
“dip” downward when metering two or more work-sections.
Repeatability – consistent metering from valve to valve
•
is achieved by flycutting all of the critical cast lands. This
means that the notch position relative to the spool stroke
is controlled and predictable. The result is consistent
machine control.
Reduced operator fatigue – the open-center core is
•
a split wing or “Y” core design, which provides for a
consistent lever force when selecting the spool from
neutral to both power positions.
Reduced function drift – low internal leakage
•
accomplished thru the use of contemporary honing
technology. Also, for those functions requiring near zero
drift, pilot-operated checks are available.
Small footprint – port accessories are installed vertical
•
to the spool, allowing the handle to be positioned closer to
the valve body.
Ease of service – the bottom two stud assemblies are
•
slotted, enabling a work section to be replaced without
completely disassembling the valve assembly. This is
accomplished by loosening the top tie bolt and then lifting
the section out of the assembly. Downtime is minimized.
Easy conversion from a left-handed to a right-handed
•
section – the work section housing and spool are
symmetrical, which enables the spool to be inserted in
either end of the housing.
Improved spool seal life – the enclosed handle assembly
•
protects the spool and spool seal area from contamination
and the potential corrosion.
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Parker Hannifin Corporation
Catalog HY17-8505/UK
Technical Information
Open-Center Directional Control Valve
VO40
Specifications
Pressures
Flow Rates
(maximum
recommended)
Internal Pilot
Pressure
Spool Leakage
from work port
to tank
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
Work section and manual actuator
without reliefs
Work Section, PO Checks with
manual actuator
Joystick assembly 0.8 kg (1.8 lbs)
Inlet Port: 300 bar (4350 PSI)
Tank Port: 50 bar (725 PSI)
Work Ports: 300 bar (4350 PSI)
40 LPM (10.6 GPM)
Required for solenoids –
contact Parker
Max. 6 mL/min @172 bar (2500 PSI)
Oil temp. 50ºC (122ºF), and viscosity
40 cSt
1.93 kg (4.3 lbs)
1.98 kg (4.4 lbs)
2.1 kg (4.6 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
T1, T2 Inlet ¾-16 UNF
P3 Outlet ¾-16 UNF
T3 Outlet ¾-16 UNF
PB1 Outlet ¾-16 UNF
Work Ports
GAGE
PORT
PC
(Hyd. Conn.)
PT
(Pneu.Conn.)
Work
Sections
Inlet
Work
Sections
Work
Sections
¾-16 UNF
M\zn-20 UNF M\zn-20 UNF
M\zn-20 UNF M\zn-20 UNF
Z\, NPT Z\, NPT Z\, NPT
>\zn-18 UNF C\,-19
>\zn-18 UNF C\,-19
>\zn-18 UNF C\,-19
>\zn-18 UNF C\,-19
>\zn-18 UNF C\,-19
>\zn-18 UNF C\,-19
¼
¼
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Parker Hannifin Corporation
Catalog HY17-8505/UK
3010
20
7.92.6 5.3
50
13.2
Flow
0
LPM
GPM
0
43.5 3
87.0
6
130.5 9
174.0
217.5
PSI
12
15
Bar
Pressure
40
10.6
Pressure Drop - Open Center P T
Top Inlet to Top Outlet
→
T
P
8 Section Valve
3 Section Valve
1 Section Valve
3010
20
7.92.6 5.3
50
13.2
Flow
0
LPM
GPM
0
43.5 3
87.0
6
130.5 9
174.0
217.5
PSI
12
15
Bar
Pressure
40
10.6
Pressure Drop - Open Center P T
Side Inlet to Side Outlet
→
P
T
8 Section Valve
3 Section Valve
1 Section Valve
3010
20
7.92.6 5.3
50
13.2
Flow
0
LPM
GPM
0
43.5 3
87.0
6
130.5 9
174.0
217.5
PSI
12
15
Bar
Pressure
40
10.6
Pressure Drop - A T
Cylinder Port to Side Outlet
→
3010
20
7.92.6 5.3
50
13.2
Flow
0
LPM
GPM
0
43.5 3
87.0
6
130.5 9
174.0
217.5
PSI
12
15
Bar
Pressure
40
10.6
Pressure Drop - P A
Top Inlet to Cylinder Port
→
A
P
8 Section Valve
3 Section Valve
1 Section Valve
8 Section Valve
3 Section Valve
1 Section Valve
T
A
Technical Information
Performance Curves
Open-Center Directional Control Valve
VO40
NOTE: ISO VG 46 oil @ 50 °C
Environmental Characteristics
The valve can be mounted in all conceivable directions.
However, the mounting base should be flat and stable so
that the valve is not subjected to strain.
While the o-rings in the valve are normally of nitrile rubber, there are a number of special fluorocarbon variants.
Please contact Parker for further information.
Temperature
Oil temperature, working range:
+20°C to 90 °C (68 to 194 °F)*
Filtration
Filtration must be arranged so that Target Contamination
Class 20/18/14 according to ISO 4406 is not exceeded.
For the pilot circuit, Target Contamination Class 18/16/13
according to ISO 4406 must not be exceeded.
Hydraulic Fluids
Best performance is obtained using mineral-base oil of
high quality and cleanliness in the hydraulic system.
Hydraulic fluids of type HLP (DIN 51524), oil for automatic
gearboxes Type A and engine oil type API CD can be
used.
Viscosity, working range: 15-380 mm2/s (15-380 cST)**
Technical information in this catalog is applicable at
an oil viscosity of 30 mm2/s (30 cST) and temperature
of 50 °C (122 °F) using nitrile rubber seals.
* Product operating limits are broadly within the above range, but
satisfactory operation within the specification may not be accomplished. Leakage and response will be affected when used at temperature extremes and it is up to the user to determine acceptability
at these levels.
** Performance efficiency will be reduced if outside the ideal values.
These extreme conditions must be evaluated by the user to establish
suitability of the product’s performance.
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Parker Hannifin Corporation
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