F3 CGR 02 *
1 4 6
1
2
3
-
Special seals
See “Hydraulic Fluids” section
Pressure relief valve
For pilot and remote control
Nominal size
02 =
1
/
4
I nominal bore pipe size
Pressure adjustment range
B = 5-69 bar (75-1000 psi)
C = 5-138 bar (75-2000 psi)
F = 5-210 bar (75-3000 psi)
Handwheel adjustment
Omit for hex. head screw version
Design number
Subject to change.
Installation dimensions remain as shown
for designs 20-29 inclusive.
4
5
6
- (K)-21-
2 3
-
5
March 1996 GB-409A
CGR-02, 21 Design
Typical Section
Basic Characteristics
Operating pressures Up to 210 bar . . . .
(3000 psi)
Flow rating 4,1 L/min (15.5 USgpm). . .
Mounting Gasket. . . . . . . . . . . . . . . . . . . .
General Description
This valve is suitable as a remote control
device for Vickers balanced piston type
relief valves, e.g. models ECG-06/10). It is
not intended to be used as a relief valve
by itself.
The valve can provide adjustment of a
system pressure from a convenient or
remote location.
Functional Symbol
Model Code
Operating Data
Maximum Pressure
70, 140 or 210 bar (1000, 2000 or
3000 psi) according to adjustment range.
See “Model Code” above.
Maximum Flow Rate
All models 4,1 L/min (15.5 USgpm). . . .
Control Data
The pressure is adjusted by slackening
the locknut and turning the adjusting
device in a clockwise direction to increase
pressure and counter-
clockwise to decrease pressure.
Re-tighten locknut after setting the
pressure.
The outlet port should be piped directly to
tank at atmospheric pressure. Any
pressure at the drain port is additive to the
pressure setting of the valve.
Hydraulic Fluids
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.
Remote Control Pressure Relief Valves
Vickers
®
Pressure Relief
3rd angle
projection
131 (5.16) max.
Allow 3 (0.12) clearance
if handwheel is used
16
(0.63)
6,4
(0.25)
Inlet port
Outlet port Y
Pressure adjustment screw
Ø10,3 (0.406 dia) thru
4 holes for mounting J
Mounting surface
(O-rings provided)
124 (4.9) max.
93,7 (3.69)
Ø47,8
(1.88 dia)
48
(1.89)
22,3
(0.88)
47,8 (1.88)
71,4
(2.81)
71,4 (2.81)
47,8
(1.88)
Locknut
Mounting Pad
The pad must be flat within 0,013 mm
(0.0005 in) and smooth within 1,6 mm
(63 microinch).
12 (0.47)
15,7
(0.62)
4 holes M10 or
3
/
8
I–16 UNC-2B
2 holes
Ø4,8 (0.188 dia)
47,8 (1.88)
71,4 (2.81)
31,0
(1.22)
47,8
(1.88)
Inlet
Outlet
71,4
(2.81)
23,1
(0.91)
9
/
16
I A/F
Y Connect outlet port directly to tank.
Any pressure at this port must be added
to relief valve pressure setting.
J Mounting bolt torque (M10 or
3
/
8
I dia
bolts) is 3,4 Nm (30 lb ft). Mounting bolts
should be SAE grade 7 or better.
2
2
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. . . . .
Installation Dimensions – mm (inches)
Mass
All models 1,3 kg (2.9 lb). . . . . . . . . . . . .
Mounting Attitude
Optional.
Ordering Procedure
When ordering a unit please specify the
complete model designation(s). See
“Model Code”.
