A
P
B
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
P
T
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
