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ManualsBrandsBelimo ManualsCharacterized Control Valves1/2" B2 Series, 2-Way Characterized Control Valve (Nickel Plated Forged Brass Body) - Cv Rating (4.7)
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800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
1
O
50905 - 05/12 - Subject to change. © Belimo Aircontrols
(
USA
)
, Inc
.
F
EATURE
S
●
Th
erma
l
i
so
l
at
i
n
g
a
d
apter
b
etween
flan
g
e and actuator
.
●
Ve
nt
holes
r
educe
condensation build-u
p
.
●
Easy direct coupling of actuator
with a sin
g
le screw.
●
orge
rass va
ve
o
y — no
pin-hole leaks.
●
Perpendicular mountin
g
f
lan
g
e and
s
q
uare
d
r
i
ve
h
ea
d
e
li
m
i
nate
l
atera
l
f
orces on the stem.
●
C
haracterizin
g
disc — made of Tefze
l
®
known
f
or excellent strength and
chemical resistance
.
●
Blow-out proof stem with thrust-bearing
T
eflon
®
disc and double O-ring design
®
for lon
g
service life
.
*
●
Teflo
n
®
seats with O-rings provide
®
constant seatin
g
force a
g
ainst the ball
and reduce torque requirement.
●
Non-corrodin
g
chrome-plated
bra
ss
or
s
tainle
ss
ball
.
●
Actuator can be mounted in four
d
ifferent
p
ositions.
* Designed
f
or service li
f
e o
f
over 100,000
f
ull c
y
cles
.
Te
f
lo
n
®
and Te
f
ze
l
®
are both registered trademarks o
f
Dupon
t
.
EQUAL PERCENTAGE VALVE CHARACTERISTI
C
In order to ensure good stability o
f
control, it is essential
f
or a
contro
l
va
l
ve to
h
ave an equa
l
percentage c
h
aracter
i
st
i
c.
This type of characteristic produces a linear variation
i
n thermal output accordin
g
to the amount of
opening of the valve
(
also known as the system
c
haracteristic
)
. Under normal testing conditions
a conventional ball valve exhibits an S-sha
p
ed
ch
aracter
is
t
i
c.
Wh
en
i
t
is
i
n
s
ta
ll
e
d
i
n a rea
l
sy
stem,
h
owever, t
hi
s c
h
aracter
i
st
i
c
i
s ser
i
ous
ly
d
eformed because, compared with its nominal
s
ize, a ball valve possesses an extremel
y
high flow
c
oefficient. Whether used with or without pipe
reducers or a reduced bore, they do not normally
allow stable regulation of the thermal capacit
y.
Belimo’s unique Characterized Control Valve™
(
CCV
)
is very
d
ifferent. A special characterizin
g
disc inside the valve
g
ives it
an equal percentage characteristic which is comparable with that of a
globe valve of the same nominal size. The flow (the
C
v
va
l
ue
)
i
s re
d
uce
d
t
o the required value b
y
a combination of the hole in the ball and the
s
haped aperture in the disc. The increase in flow as the valve is opened
i
s very s
l
ow an
d
contro
ll
e
d.
T
his produces better part-load behavior and improved stability of
c
ontrol while also optimizing energy consumption
.
BENEFIT
O
F THE BELIM
O
C
HARA
C
TERIZIN
G
DI
SC
●
Equal percentage flow characteristic.
●
Excellent control stability assured with the characterizing disc.
●
C
v
values e
q
ual to
C
v
values of
g
lobe valves the same size
.
●
The need for multiple pipe reduction is usually eliminated.
●
Better control prevents
“
hunting” of the control loop, increasing
life span of actuator and valve
.
P
atente
d
T
ec
h
no
l
o
gy
C
haracterized Control Valves™
(
CCV
)
F
ea
t
u
r
es
a
n
d
B
e
n
efi
t
s

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