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Type EZR
Table 10. Main Valve Maximum Pressure Ratings, Diaphragm Selection Information and Main Spring Selection
BODY SIZE
DIaPHRagM
nPS / Dn
MaTERIaL
17E68 Nitrile (NBR)
Low temperature
17E97 Nitrile (NBR)
High pressure and/or erosion
1 and 1-1/4 x 1 /
resistance
25 and 32 x 25
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
17E68 Nitrile (NBR)
Low temperature
17E97 Nitrile (NBR)
High pressure and/or erosion
2 x 1 / 50 x 25
resistance
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
17E68 Nitrile (NBR)
Low temperature
17E97 Nitrile (NBR)
High pressure and/or erosion
2 / 50
resistance
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
17E68 Nitrile (NBR)
Low temperature
17E97 Nitrile (NBR)
High pressure and/or
3 / 80
erosion resistance
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
17E68 Nitrile (NBR)
Low temperature
17E97 Nitrile (NBR)
4, 6 x 4
High pressure and/or
and 8 x 4 /
erosion resistance
100, 150 x 100
and 200 x 100
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
17E97 Nitrile (NBR)
High pressure and/or
6, 8 x 6
erosion resistance
and 12 x 6 /
150, 200 x 150
17E88 Fluorocarbon (FKM)
and 300 x 150
High aromatic hydrocarbon
content resistance
17E97 Nitrile (NBR)
8 / 200
High pressure and/or
erosion resistance
1. See Table 1 for main valve structural design ratings and Table 3 for pilot ratings.
2. The red, black, purple, red stripe and black with white stripe springs are only recommended for applications where the maximum inlet pressure can exceed 500 psig / 34.5 bar.
3. For differential pressures above 400 psid / 27.6 bar d diaphragm temperatures are limited to 150°F / 66°C.
4. T hese are recommendations that provide the best regulator performance for a typical application. Please contact your local Sales Office for further information if a deviation from the
standard recommendations is required.
14
MaxIMUM
MaxIMUM
OPERaTIng
OPERaTIng InLET
DIFFEREnTIaL
PRESSURE
(4)
PRESSURE
psig
bar
psid
100
6.9
100
460
31.7
400
500
34.5
500
1050
72.4
800
100
6.9
100
500
34.5
500
750
51.7
500
100
6.9
100
360
24.8
300
500
34.5
500
1050
72.4
800
100
6.9
100
750
51.7
500
100
6.9
100
460
31.7
400
500
34.5
500
1050
72.4
800
100
6.9
100
500
34.5
500
750
51.7
500
100
6.9
100
360
24.8
300
500
34.5
500
1050
72.4
800
100
6.9
100
500
34.5
500
750
51.7
500
100
6.9
100
360
24.8
300
500
34.5
500
1050
72.4
800
100
6.9
100
500
34.5
500
750
51.7
500
100
6.9
100
500
34.5
500
1050
72.4
800
100
6.9
100
500
34.5
500
750
51.7
500
100
6.9
100
500
34.5
500
1050
72.4
800
MaxIMUM
EMERgEnCY InLET
anD DIFFEREnTIaL
PRESSURE
(4)
bar d
psid
bar d
6.9
100
6.9
27.6
460
31.7
34.5
1050
72.4
55.2
1050
72.4
6.9
100
6.9
34.5
750
51.7
(3)
34.5
750
51.7
(3)
6.9
100
6.9
20.7
360
24.8
34.5
500
34.5
55.2
1050
72.4
6.9
100
6.9
34.5
750
51.7
(3)
6.9
100
6.9
27.6
460
31.7
34.5
1050
72.4
55.2
1050
72.4
6.9
100
6.9
34.5
750
51.7
(3)
34.5
750
51.7
(3)
6.9
100
6.9
20.7
500
34.5
34.5
1050
72.4
55.2
1050
72.4
6.9
100
6.9
34.5
750
51.7
(3)
34.5
750
51.7
(3)
6.9
100
6.9
20.7
500
34.5
34.5
1050
72.4
55.2
1050
72.4
6.9
100
6.9
34.5
750
51.7
(3)
34.5
750
51.7
(3)
6.9
100
6.9
34.5
1050
72.4
55.2
1050
72.4
6.9
100
6.9
34.5
750
51.7
(3)
34.5
750
51.7
(3)
6.9
100
6.9
34.5
1050
72.4
55.2
1050
72.4
(1)
MaIn SPRIng
DIaPHRagM
COLOR CODE
DESIgnaTIOn
Light Blue
Black
Black
Black with White
Stripe
(2)
Light Blue
Black
Black with White
Stripe
(2)
Light Blue
Black with White
Stripe
Black with White
Stripe
Red Stripe
(2)
Light Blue
Black with White
Stripe
Yellow
Green
Green
Red
or Purple
(2)
(2)
Yellow
Green
Red
or Purple
(2)
(2)
130
Yellow
Light Blue
Light Blue
Black
(2)
Yellow
Light Blue
Black
(2)
Yellow
Green
Green
Red
(2)
Yellow
Green
Red
(2)
Yellow
Green
Red
(2)
Yellow
Green
Red
(2)
Yellow
Green
Red
(2)
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