Emission Free Bellows Seal Valves – Control Characteristics

The basic characteristic is equal percentage but the Paragon trim greatly extends the control capability at valve plug lifts up to 50% of full travel. See the shaded area in the graphic to the right.

Kv Values

 
Flow Capacity Kv
Valve Size (mm)
15
20
25
40
50
65
80
100
150
Trim A
3.5
6.4
10.0
24.0
34.0
62.0
100
160
330
Trim B
1.5
1.5
6.4
6.4
10.0
24.0
62
100
160
Trim C
-
-
1.5
1.5
6.4
10.0
38
62
100

Differential Pressures, Flow-to-open, Spring-to-close (AFC)

 
Valve Shut-off Capability (Barg)
Valve Size (mm)
15
20
25
40
50
65
80
100
150
250 Actuator (3 Barg)
48
48
48
20
15
6
-
-
-
500 Actuator (3.5 Barg)
-
-
-
-
-
18
12.0
7.5
3.0

Differential Pressures, Flow-to-open, Sprint-to-open (AFO)

 
Valve Shut-off Capability (Barg)
Valve Size (mm)
15
20
25
40
50
65
80
100
150
STD. Actuator
250cm2
500cm2
Actuator Supply         
3 Bar AIR
48
48
48
-
-
-
-
-
-
4 Bar AIR
48
48
48
18
11
6.8
5.1
3.1
1.2
5 Bar AIR
48
48
48
36
22
13.5
14.5
9.2
3.9
6 Bar AIR
48
48
48
48
33
20.3
24.0
15.2
6.7

Differential Pressures, Flow-to-close, Spring-to-close (AFC)

 
Valve Shut-off Capability (Barg)
N.B. All differential pressures are maximum values for ANSI Class 300 and will need to be derated for other body ratings.

For further information about optional trim sizes, actuator combinations and spring rates please consult out Techincal Sales Department.
Valve Size (mm)
80
100
150
STD. Actuator
500cm2
Actuator Supply   
4 Bar AIR
5.7
3.3
1.2
5 Bar AIR
16.2
9.8
4.1
6 Bar AIR
26.6
16.2
6.8