Brochure

10
Series STVC,
8” – 12”
This diagram details the
relationship between flow,
pressure drop and valve pre-
set points. Use the diagram
to select the correct valve
size and corresponding
handwheel setting to fulfill
the application requirements.
Determine the required
flow in the circuit (A) and
the pressure drop (B). Draw
a line between these two
values. Read off the corre-
sponding Cv value on the
Cv scale (C).
Determine the valve setting,
in handwheel turns, by
drawing a horizontal line
(D) from the intersection
point on the Cv scale to
the corresponding valve
setting position.
For the highest level of
accuracy, it is recommended
to choose a valve that has
at least 3 open turns.
Example: A 10” valve is
required to be open 8
turns for a Cv value of 890
at a flow rate of 1000 gpm
and a pressure drop of 3 ft.
A
CD
B
I/s GPM Cv Kv Size: 8” 10” 12” ft. kPa
Setting, number of turns
®
BALANCING
MA CON