User Manual

JSR SeRieS HigH PuRity Bio-PHaRma gaS PReSSuRe Reducing ValVe
trim Flow (cv) selection Graphs
J perFormance 0.5 cv
0
10
20
30
40
50
0
10
20
30
40
50
60
70
80
90
100
P1 = 150 psig
P1 = 150 psig
P1 = 100 psig
P1 = 100 psig
Air Flow (SCFM)
Outlet Pressure - P2 (psig)
J perFormance 0.8 cv
0 10 20 30 40 50
Air Flow (SCFM)
60 70 80
0
10
20
30
40
50
60
70
80
90
100
P1 = 150 psig
P1 = 150 psig
P1 = 100 psig
P1 = 100 psig
Outlet Pressure - P2 (psig)
-4-
To select a valve with the proper Cv:
1. Please note maximum inlet pressure, and seat temperature limitations on page 2. Select a seat material appropriate for that temperature
and the gas owing through the valve.
2. Convert pressure and ow units to those shown in the graphs below.
3. The sloped lines are the ow curves associated with either a 150 psi or 100 psi inlet pressure (P1). Make sure the application inlet pres-
sure is between 100 and 150 psi. If not, contact the factory.
4. Select the graph that encompasses the minimum and maximum ows of your installation (horizontal axis), and with an appropriate outlet
regulated pressure (vertical axis).
5. Plot your desired set point on the graph you chose, at the ow rate you expect at that set point.
6. Pick the P1 inlet pressure curve in your graph that is closest to your valve installation inlet pressure.
7. Draw a curve with the same slope parallel to that curve through your plotted set point. That curve approximates the ow of your valve
under operating conditions.
Note: if your operating conditions and media are outside the bounds of either graph, consult factory.