APB
FCG-3-***-*-10 models, with reverse
flow check
B
A
B
A
A
A
B
B
Detailed symbol
Simplified symbol
FCG-3-***-A-*-10 models, with reverse
flow check and anti-jump feature
A
B
B
A
P
PT
Typical
directional valve
P
Note: FCG-3-***-A models are designed
primarily for meter-in applications where the P
port can be connected to an upstream point
that provides continuous pilot pressure to the
hydrostat to prevent “jump”. Consult your
Vickers representative about alternative
applications.
Rev. 8/97 GB-514A
F(C)G-3, 10 Series; ISO 4401, Size 03/NFPA D01
Basic Characteristics
Max. flow rates 1,0 to 18 L/min. . . . . . . .
(0.42 to 4.75 USgpm),
dependent on model
Max. pressure 315 (4500 psi) or. . . . . . .
160 bar (2325 psi),
dependent on model
Functions In line, with or without . . . . . .
reverse flow check and
anti-jump feature
General Description
These pressure compensated valves are
designed to provide adjustable controlled
flow rates independent of changes in inlet
and/or outlet pressures above a minimum
pressure differential. Models are available
with or without integral reverse flow check
valves. Those with check valves are
optionally available with an anti-jump
feature designed to eliminate transient
surges above the controlled flow rate
setting whenever flow is first directed to
the inlet port A.
Functional Symbols
FG-3-***-*-10 models, without reverse
flow check
All models have rotary adjustment of
controlled flow and can be supplied with
or without an integral key-lock feature.
The construction of a typical model with
integral check valve and anti-jump feature
is shown opposite. Its operation is the
same as for similar valves described in
the “Industrial Hydraulics” manual
although the spring-loaded hydrostat is
functionally located downstream of the
adjustable restrictor, as shown in the
“Functional Symbols” section.
Pressure Compensated Flow
Control Valves
Vickers
®
Flow Controls
Model Code
F(C)G
Type
FCG= Flow control with reverse flow
check
FG = Flow control without reverse
flow check
Max. controlled flow rate
10 = 1,0 L/min (0.26 USgpm)
16 = 1,6 L/min (0.42 USgpm)
32 = 3,2 L/min (0.85 USgpm)
63 = 6,3 L/min (1.66 USgpm)
120 = 12,0 L/min (3.17 USgpm)
180 = 18,0 L/min (4.75 USgpm)
-3- *** (-A)- *
1 2 4 5
1
2
3
-
10
Anti-jump feature (FCG model
option)
Omit when not required and for all FG
models.
Controlled flow adjustment
H = Manual without key lock
K = Manual with key lock
Design number, 10 series
Subject to change. Installation
dimensions remain unchanged for
design numbers 10-19 inclusive.
5
3
4
2
Operating Data
Pressure Limits
Max. pressure, all ports:
FCG-3-***-A models
All other models
160 bar (2320 psi)
315 bar (4500 psi)
Min. pressure differential for effective controlled flow
(port A pressure > port B pressure):
F(C)G-3-10/16/32 models
F(C)G-3- 63/120/180 models
5 bar (75 psi)
8,5 bar (125 psi)
Flow Limits
Recommended controlled flow ranges:
F(C)G-3-10
F(C)G-3-16
F(C)G-3-32
F(C)G-3-63
F(C)G-3-120
F(C)G-3-180
0,015 to 1,0 L/min (0.004 to 0.26 USgpm)
0,015 to 1,6 L/min (0.004 to 0.42 USgpm)
0,025 to 3,2 L/min (0.007 to 0.85 USgpm)
0,025 to 6,3 L/min ( 0.007 to 1.66 USgpm)
0,08 to 12,0 L/min (0.02 to 3.17 USgpm)
0,08 to 18,0 L/min (0.02 to 4.75 USgpm)
Max. recommended reverse flow (FCG model) 30 L/min (7.9 USgpm)
Applications
FG-3 models are for general use in
meter-in, meter-out or bleed-off
applications.
FCG-3-***-*-10 models are for general use
in meter-in or meter-out applications in
which high reverse flow rates can occur.
FCG-3-***-A-10 models are for similar
use in those meter-in applications where
the possibility of transient surges above
the controlled flow rate setting,
whenever flow is first directed to the inlet
port, is undesirable, e.g.
– for feed speed control
– for successive fast approach/feed
sequences (fine machining of
interrupted bores).
Typical with petroleum oil at 36 cSt (170 SUS) and at 50_C (122_ F)
Controlled Flow, F(C)G-3-16/32 Models
0
1234 5 678910
Scale reading
0
4,0
3,6
3,2
2,8
2,4
2,0
1,6
1,2
0,8
0,4
1.0
0.2
0.4
0.6
0.8
Flow rate
USgpm L/min
27 54 81 108 135 162189 216 243 270
0
Angular rotation (degrees) from zero
Controlled Flow, F(C)G-3-63/120/180 Models
0
1234 5 678910
Scale reading
0
Flow rate
USgpm L/min
27 54 81 108 135 162189 216 243 270
0
2
4
6
8
10
12
14
16
18
20
4
5
3
2
1
Angular rotation (degrees) from zero
Reverse Flow Pressure Drop, FCG Models
bar
0
psi
Flow rate
Pressure drop
2
4
6
8
100
80
60
40
20
120
0
0
L/min
USgpm
10
12
10
20 30
140
160
12345678
3
Performance Data
Thermal stability of controlled flow,
typical example:
Flow set at 20_C (68_F) 0,25 L/min. . . .
(0.07 USgpm)
Flow increase at
70_C (158_ F) +12%. . . . . . . . . . . . . . . . .
Hydraulic Fluids
All valves can be used with antiwear or
other hydraulic petroleum oils. If
fire-resistant fluids are required to be
used, consult your Vickers
representative. The extreme operating
viscosity range is from 300 to 10 cSt
(1460 to 54 SUS) but the recommended
running range is from 54 to 13 cSt
(245 to 70 SUS). For further information
fluids see catalog 920.
Temperature Limits
Min. –20_C (–4_F). . . . . . . . . . . . . . . . . .
Max.* +80_ C (176_ F). . . . . . . . . . . . . . . .
*
To obtain optimum service life from both
fluid and hydraulic system, 65_C (150_ F) is
normally the maximum temperature for
hydraulic petroleum oils.
Whatever the actual temperature range,
ensure that the 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 9132 or
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 (3050 psi) 19/17/14. . . . .
Above 210 bar (3050 psi) 19/17/14. . . .
Installation Dimensions in mm (inches)
P
A
B
P
A
B
10
63,5 (2.5)
60,0 (2.36)
67 (2.34)
46,5
(1.83)
0
Ø 9
(0.354 dia)
Ø 5,5 (0.217 dia)
3,0
(0.12)
Mounting surface,
seals supplied with
valve.
Ø 3,0
(0.118 dia)
3,0 (0.12)
52,0
(2.05)
58,0
(2.28)
94,0
(3.7)
117,5 (4.62)
Models with
key lock
137,5 (5.4)
To remove key
7,0 (0.28)
7,5 (0.3)
To adjust controlled flow rate:
For valves with key lock, first unlock by
turning key counter-clockwise. Turn
adjustment knob clockwise to increase flow
rate, or counter-clockwise to decrease flow
rate. Relock models with key lock.
AB
FCG-3 models only
3rd angle
projection
For dimensions of ISO 4401, size 03 mounting surface and
Vickers subplates, see catalog 2425.
For details of Vickers fixing bolt kits, see catalog 2314.
Note the following exceptions to the standard interface:
1. Only two fixing bolt holes are required, as shown above.
2. Port T is never required.
3. Port P is used only for FCG-3-***-A models.
4
Mass
All models 1,1 kg (2.4 lb) approx.. . . . . .
Installation Data
Mounting Attitude
Unrestricted
Mounting Surface, Subplates and
Fixing Bolts
See note in “Installation Dimensions”
section. F(C)G-3 valves cannot be used
to top normal ISO 4401 size 03/NFPA
D01 module stacks unless the
application will be satisfactory with a
two-bolt fixing and with the two or
three-port arrangements of the F(C)G-3
valves; consult your Vickers
representative if such an arrangement
is required.
A two-bolt fixing kit BK 986743M
containing M5 x 60 long soc. hd. cap
screws is available separately for
securing an F(C)G-3 valve direct to a
subplate.
Ordering Procedure
Valves and fixing bolt kits must be
ordered as separate items e.g.
2 off FCG-3-120-A-K-10 valve
2 off BK 986743M bolt kit
Service and Repair
The construction of these valves is such
that the only spare parts available are
the mounting surface seals (kit no.
986742 containing three seals).
Experience shows that the only
servicing likely to be needed is the
possibility to dismantle the
spring-loaded hydrostat for cleaning in
cases where contaminant has
accumulated through continuous use in
less than ideal environments. For details
see “Spare Parts” leaflet 40594.
