26
Eaton Vickers
Solenoid Operated Directional Valves
Product Catalog V-VLDI-MC011-E September 2008
Appendix
Ambient range:
-20°C to 70°C (-4°F to +158°F)
Fluid Temperature
Fluid
Mineral Water
Temp.
oil
containing
Minimum -20°C
+10°C
(-4°F)
(+50°F)
Maximum* +70°C
+54°C
(+158°F) (+129°F)
* To obtain optimum service life
from both fluid and hydraulic
system, 65°C (150°F) is the
recommended maximum
fluid temperature, except for
water-containing fluids.
For synthetic fluids, consult
fluid manufacturer or Eaton
representative where limits are
outside those for mineral oil.
Whatever the actual tempera-
ture range, ensure that fluid
viscosities stay within the
limits specified in “Hydraulic
Fluids”.
Temperature Limits
Proper fluid condition is es-
sential for long and satisfac-
tory life of hydraulic compo-
nents and systems. Hydraulic
fluid must have the correct
balance of cleanliness, mate-
rials and additives for protec-
tion against wear of compo-
nents, elevated viscosity and
inclusion of air.
Essential information on
the correct methods for
treating hydraulic fluid is
included in Eaton publica
-
tion 561;“Vickers Guide to
Systemic Contamination
Control,” available from your
local Eaton distributor or by
contacting Eaton, Incorpo
-
rated. Recommendations on
filtration and the selection of
products to control fluid con-
dition are included in 561.
Recommended cleanliness
levels, using petroleum oil
under common conditions,
are based on the highest
fluid pressure levels in the
system and are coded in the
chart below. Fluids other than
petroleum, severe service cy-
cles or temperature extremes
are cause for adjustment of
these cleanliness codes. See
Eaton's Vickers
®
publication
561 for exact details.
Eaton products, as any com
-
ponents, will operate with
apparent satisfaction in fluids
with higher cleanliness codes
than those described. Other
manufacturers will often rec-
ommend levels above those
specified.
Experience has shown, how
-
ever, that life of any hydraulic
components is shortened
in fluids with higher cleanli-
ness codes than those listed
below. These codes have
been proven to provide a long
trouble-free service life for
the products shown, regard-
less of the manufacturer.
Fire resistant fluids usually
have higher specific gravities
than oil. The specific gravity
of a fluid may be obtained
from its producer.
Fluid Cleanliness
When placing an order,
please specify full model
designations of valves,
subplates and kits. Refer
to relevant “Model Code”
sections.
Ordering Procedure
System Pressure Level
bar (psi)
Product
<70 (<2000)
70–207 (2000–3000)
207+ (3000+)
Vane pumps, fixed
20/18/15 1
9/17/14
18/16/13
Vane pumps, variable
18/16/14
17/15/13
Piston pumps, fixed
19/17/15
18/16/14
17/15/13
Piston pumps, variable
18/16/14
17/15/13
16/14/12
Directional valves
20/18/15
20/18/15
19/17/14
Proportional valves
17/15/12
17/15/12
15/13/11
Servo valves
16/14/11
16/14/11
15/13/10
Pressure/Flow controls
19/17/14
19/17/14
19/17/14
Cylinders
20/18/15
20/18/15
20/18/15
Vane motors
20/18/15
19/17/14
18/16/13
Axial piston motors
19/17/14
18/16/13
17/15/12
