Table 3.
Main Valve Minimum Differential Pressures
(1)
17E68 NITRILE (NBR)
17E97
(1)
NITRILE (NBR)
17E88 FLUOROCARBON (FKM)
-28 to 66°C / -20 to 150°F
-17 to 66°C / 0 to 150°F
-17 to 121°C / 0 to 250°F
(2)
1. The DN 150 / NPS 6, 17E97 diaphragm will perform in gas temperatures as low as -29°C / -20°F.
2. For differential pressures above 27.6 bar / 400 psig diaphragm temperature is limited to 66°C / 150°F.
Table 4.
Temperature Capabilities
MAIN VALVE
BODY SIZE
MAIN SPRING PART
NUMBER AND
COLOR CODE
DIAPHRAGM
MATERIAL
MINIMUM DIFFERENTIAL, PERCENT OF CAGE CAPACITY
FOR 90% CAPACITY
FOR 100% CAPACITY
100% Trim
60% Trim
30% Trim
100% Trim
60% Trim
30% Trim
DN
NPS
bar
psi
bar
psi
bar
psi
bar
psi
bar
psi
bar
psi
25
1
19B2400X012, Light Blue
17E68 and 17E88
1.7
24
2.0
29
2.2
31
1.7
24
2.2
31
2.8
40
GE12727X012, Black
17E97
2.5
35
2.7
38
2.9
42
2.5
35
2.7
39
3.6
52
17E68 and 17E88
2.1
30
2.4
35
2.7
39
2.1
30
2.5
36
3.6
52
19B2401X012,
Black with White Stripe
(3)
17E88 and 17E97
3.0
43
3.4
50
3.9
56
3.0
43
3.7
53
4.7
68
50
2
19B0951X012, Yellow
(2)
17E68 and 17E88
0.83
12
1.0
15
1.0
15
0.83
12
1.7
25
1.4
20
18B2126X012, Green
17E97
1.7
24
1.7
25
1.8
26
1.7
24
2.1
30
2.6
37
17E68 and 17E88
1.2
18
1.4
20
1.5
22
1.3
19
1.8
26
1.9
28
18B5955X012, Red
(3)
GE05504X012, Purple
(3)
17E88 and 17E97
2.0
29
2.0
29
2.1
31
2.1
31
2.4
35
3.03
43
80
3
T14184T0012, Yellow
(2)
17E68 and 17E88
1.1
16
1.3
19
1.7
24
1.6
23
1.6
23
2.0
29
19B0781X012, Light Blue
17E97
1.6
23
1.6
23
1.6
23
1.6
23
1.6
23
1.7
25
17E68 and 17E88
1.5
21
1.5
22
1.9
28
1.9
28
1.9
28
2.3
33
19B0782X012, Black
(3)
17E88 and 17E97
2.2
32
2.3
33
3.0
43
2.6
38
2.6
38
3.4
50
100
4
T14184T0012, Yellow
(2)
17E68 and 17E88
0.69
10
0.83
12
0.97
14
1.7
25
1.7
25
1.7
25
18B8501X012, Green
17E97
1.1
16
1.2
17
1.5
21
2.3
34
2.3
34
2.3
34
17E68 and 17E88
1.1
16
1.2
17
1.4
20
2.1
30
2.1
30
2.1
30
18B8502X012, Red
(3)
17E88 and 17E97
1.5
21
1.7
24
1.8
26
2.8
40
2.8
40
2.8
40
150
6
19B0364X012, Yellow
(2)
17E97
0.69
10
0.76
11
0.97
14
0.83
12
1.1
16
1.1
16
17E88
0.69
10
0.90
13
0.90
13
0.83
12
1.5
21
1.5
21
19B0366X012, Green
17E97
0.97
14
1.5
22
1.5
22
1.3
19
2.0
29
2.0
29
17E88
1.2
17
1.5
21
1.5
21
1.4
20
2.5
36
2.5
36
19B0365X012, Red
(3)
17E88 and 17E97
1.6
23
2.0
29
2.0
29
2.1
30
2.8
41
2.8
41
200
8
GE09393X012, Yellow
(2)
17E97
1.1
16
- - - -
- - - -
1.3
19
- - - -
- - - -
GE09396X012, Green
1.4
20
1.6
23
GE09397X012, Red
(3)
1.8
26
2.1
30
1. See Table 1 for structural design ratings, Table 3 for pilot ratings and Table 6 for maximum pressure ratings.
2. The white and yellow springs are only recommended for inlet pressures under 6.9 bar / 100 psig.
3. The red, black, purple, red stripe and black with white stripe springs are only recommended for applications where the maximum inlet pressure can exceed 34.5 bar / 500 psig.
Adjustment
To change the set pressure, remove closing cap
or loosen the locknut and turn the adjusting screw
clockwise to increase set pressure or counterclockwise
to decrease pressure. Monitor the set pressure with a
test gauge during the adjustment. Replace closing cap
or tighten the locknut to maintain the desired setting.
Taking Out of Service (Shutdown)
!
WARNING
To avoid personal injury resulting from
sudden release of pressure, isolate the
backpressure regulator from all pressure
before attempting disassembly.
If pressure is introduced first to the
main valve before the pilot, the main
valve may go wide-open and subject the
downstream system to full inlet pressure.
Type EZR Relief
3
