2
VALVES
VAL-308
For further information www.norgren.com
1
100
2 3 4 5 6 7
90
80
70
60
50
40
30
20
10
0
Back Pressure - PSI
Pressure
Rating
-
PSI
1
110
2 3 4 5 6 7
120
130
100
90
80
70
60
50
40
30
20
10
0
Back Pressure - PSI
Pressure
Rating
-
PSI
1 2 3 4 5 6 7 8 9 10 11 12
19
20
21
22
23
24
25
26
27
28
29
30
18
17
16
15
Back Pressure - PSI
Pressure
Rating
-
PSI
5/32
1/8
3/32
1/16
3/64
1
110
2 3 4 5 6 7
100
90
80
70
60
50
40
30
20
10
0
Back Pressure - PSI
Pressure
Rating
-
PSI
1/32
5/64
1/32
3/64
1/16
5/64
3/32
5/32
1/8
1/32
3/64
1/16
5/64
3/32
1/8
5/32
3/16
1/4
Diaphragm Isolation Valves have a large difference in pressure area
between open and closed, creating a sensitivity to back pressure.
Excessive back pressure can hinder the closing of the valve. Please use
the back pressure charts below to deetermine the maximum operating
pressure of the valve based on the maximum potential back pressure
in the application. Choose the orifice size which meets a worst case
condition.
Unless a preference for diaphragm body shape is specifically requested,
valves may be shipped with either square or round bodies, at IMI's
discretion, and depending on availability or size of order.
Isolation Valve Back Pressure De-rating Curves
Series 1
Isolation Valves
Series 2
Isolation Valves
Series 6
Isolation Valves
Series 9
Isolation Valves
Isolation Valves
