April 1996 GB-411A
C175, 11 Design
Typical Section
Basic Characteristics
Operating pressures Up to 210 bar . . .
(3000 psi)
Flow rating 12 L/min (3.2 USgpm). . . . .
Mounting Panel. . . . . . . . . . . . . . . . . . . . .
General Description
This single-stage valve is designed for
applications requiring an adjustable
pressure relief valve or pressure
regulating valve of small capacity. It may
also be used as a remote control valve
for pilot operated pressure control
valves (e.g. models ECG-06/10).
Functional Symbol
Model Code
F3 C-175 *
1 4
1
2
3
-
Special seals
See “Hydraulic Fluids” section.
Basic model
Pressure adjustment range
B = 5,2-69 bar (75-1000 psi)
C = 35-138 bar (500-2000 psi)
F = 104-210 bar (1500-3000 psi)
Design number
Subject to change.
Installation dimensions remain as
shown for designs 10-19 inclusive.
Port tappings
UB = G (BSPF) pipe threads
4
5
-
11
2
-
3
UB
5
Operating Data
Maximum Pressure
According to adjustment range. See
“Model Code” above.
Maximum Flow Rate
All models 12 L/min (3.2 USgpm). . . . . .
Hydraulic Fluids and Seals
All valves can be used with antiwear
hydraulic oils, water-in-oil emulsions and
water glycols.
Add prefix “F3” to model designation
when phosphate ester (except
alkyl-based) or chlorinated hydrocarbons
are to be used.
Viscosities can range between 860 and
13 cSt (4000 and 70 SUS) but the
recommended running range is from 54
to 13 cSt (245 to 70 SUS).
For further information about fluids see
leaflet 694.
Temperature Limits
Ambient
Min. –20_C (–4_F). . . . . . . . . . . . . . . . . .
Max. +70_ C (158_ F). . . . . . . . . . . . . . . . .
Fluid temperature
Petroleum
oil
Water-
containing
Min.
Max.*
–20_C
(–4_F)
+80_ C
(+176_F)
+10_ C
(50_F)
+54_ C
(129_F)
* To obtain optimum service life from both
fluid and hydraulic system 65_C (150_ F)
normally is the maximum temperature
except for water-containing fluids.
For synthetic fluids consult manufacturer
or Vickers representative where limits
are outside those for petroleum use.
Whatever the actual temperature range,
ensure that viscosities stay within the
limits specified in the “Hydraulic Fluids”
section.
Contamination Control Requirements
Recommendations on contamination
control methods and the selection of
products to control fluid condition are
included in Vickers publication 561,
“Vickers Guide to Systemic
Contamination Control”. The book also
includes information on the Vickers
concept of “ProActive Maintenance”.The
following recommendations are based
on ISO cleanliness levels at 2 mm, 5 mm
and 15 mm. For products in this catalog
the recommended levels are:
Up to 210 bar (3000 psi) 19/17/14. . . . .
Vickers
®
Pressure Relief
Pressure Relief Valves
Ø44,5
(1.75 dia)
4 holes Ø6,8 (0.27 dia)
countersunk 11,0 (0.43) deep
Tank return port G
1
/
4
Pipe fitting must not
enter more than 10,5
(0.41)
Pressure inlet
connection G
1
/
4
12,7 (0.50)
77,8
(3.06)
Ø73,2
(2.88 dia)
P.C.D
57,2 (2.25)
117,5
(4.62)
59 (2.32)
max.
22,6
(0.89)
1,6
(0.06)
Handwheel for
pressure adjustment
Locknut
3rd angle
projection
2
Control Data
The adjust the pressure slacken the
locknut and turn the hand-wheel
clockwise to increase pressure and
counter-clockwise to decrease pressure,
retighten locknut after setting the
pressure.
The outlet port should be piped direct to
tank at atmospheric pressure. Any
pressure at the drain port is additive to
the pressure setting of the valve.
Installation Dimensions
in mm (inches)
Mass
All models 1,6 kg (3.52 lb). . . . . . . . . . . .
Mounting Attitude
Optional.
Ordering Procedure
Before ordering check availability with
your Vickers representative.
When ordering, please specify the
complete model designation(s) of the
valve(s) required. See “Model Code”.
