Jsrlf s – Steriflow JSRLF Series User Manual
Page 6
t
rim
F
low
g
raphs
-6-
JSRLF S
eRieS
L
ow
F
Low
P
ReSSuRe
R
educing
V
aLVe
• 0.012 Cv — 5 – 50 psi Spring Range
• 0.012 Cv — 50 – 150 psi Spring Range
F
low
(SCFH)
450
R
egula
ted
P
Re
SS
uR
e
(PSI)
0
20
40
60
80
100
120
0
50
100
150
200
250
300
350
400
P1=250 PSI
P1=1000 PSI
P1=3000 PSI
500
0
50
100
150
200
250
300
350
400
450
R
egula
ted
P
Re
SS
uR
e
(PSI)
0
5
15
20
25
30
P1=100 PSI
P1=250 PSI
P1=1000 PSI
P1=3000 PSI
F
low
(SCFH)
10
To select a valve with the proper Cv:
1. Convert pressure and flow units to those shown on
the graphs below.
2. Select the graph below with a flow range (horizontal
axis) that encompasses the minimum and maximum
flows of your installation, and with an appropriate out-
let regulated pressure (vertical axis). Also make sure
that the application inlet pressure is covered by the
graph (P1 legend box at bottom right of each chart).
Please note maximum inlet pressure, pressure at
temperature and differential pressure limitations on
page 2.
3. Plot your desired set point on the graph you chose, at
the flow rate you expect at that set point.
4. Pick the P1 inlet pressure curve in your graph (see P1
legend box) that is closest to your valve installation
inlet pressure.
5. Draw a curve with the same slope parallel to that
curve through your plotted set point. That curve ap-
proximates the flow of your valve under operating
conditions.