CLA-VAL
CPC
Actuated Position Control 4-20 mA
`
CLA-VAL
Europe
www.cla-val.ch
4
-
LIN040DE
A 02/10
© Copyright CLA-VAL Europe - Specifications subject to change without notice - no contractual illustrations.
`
4 Typical applications of the CLA-VAL series CPC
The CLA-VAL CPC SERIES receives a remote analogical signal [4-20 mA] over a SCADA system or equivalent. This
signal will act directly on the «brushless» motor, which will drive the orifice coupling until it reaches its corresponding set
value.
The CPC Actuator is particularly recommended if the user intends to apply a hydraulically operated control whilst
maintaining the flexibility to change its respective set value at anytime. The applications are numerous considering the
various parameters of a hydraulically operated system, whose four key applications are illustrated above and can be
listed as follows :
Inlet pressure control - Outlet pressure control - Rate of flow control - Level control
The CLA-VAL CPC main valve offers a
characteristic curve extremely well
adapted to a regulating process within a
SCADA supervision system.
In fact Fig. 1 illustrates the characteristic
curves of a butterfly (
green
) and ball
(
blue
) valve, as well as the one of the
CPC (
red
) main valve. This demonstrates
that the CLA-VAL CPC curve offers on
one hand a
much
wider
regulating
range
than the two other and on the other
hand a
low opening value
at small
rate
of flow
. These two conditions are the key
factors for any progressive, accurate and
sensible regulating operation which allows
the CLA-VAL CPC to offer such a wide
application range.
D
D
o
o
w
w
n
n
s
s
t
t
r
r
e
e
a
a
m
m
p
p
r
r
e
e
s
s
s
s
u
u
r
r
e
e
(
(
P
P
2
2
)
)
c
c
o
o
n
n
t
t
r
r
o
o
l
l
L
L
e
e
v
v
e
e
l
l
(
(
H
H
)
)
c
c
o
o
n
n
t
t
r
r
o
o
l
l
U
U
p
p
s
s
t
t
r
r
e
e
a
a
m
m
p
p
r
r
e
e
s
s
s
s
u
u
r
r
e
e
(
(
P
P
1
1
)
)
c
c
o
o
n
n
t
t
r
r
o
o
l
l
R
R
a
a
t
t
e
e
o
o
f
f
f
f
l
l
o
o
w
w
(
(
Q
Q
)
)
c
c
o
o
n
n
t
t
r
r
o
o
l
l
4-20 mA Signal
Fig. 1
Characteristic curves
% Opening
Rate of flow
(l/s
)
Q
max.
Содержание CPC 138-01
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