Type EZR
14
Table 10. Main Valve Maximum Pressure Ratings, Diaphragm Selection Information, and Main Spring Selection
(1)
OPERATInG InLET
PRESSURE
PSIG (
OPERATInG
PRESSURE
1 and 1-1/4 x 1
(25 and 32 x 25)
17E68 Nitrile (NBR)
Low temperature
100 (6,9) 100 (6,9) 100 (6,9) Light Blue
130
460 (31,7) 400 (27,6) 460 (31,7) Black
17E97 Nitrile (NBR) High
pressure and/or erosion
resistance
500 (34,5) 500 (34,5) 1050 (72,4) Black
1050 (72,4) 800 (55,2) 1050 (72,4)
Black with White
Stripe
(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 (6,9) 100 (6,9) 100 (6,9) Light Blue
500 (34,5) 500 (34,5)
(3)
750 (51,7) Black
750 (51,7) 500 (34,5)
(3)
750 (51,7)
Black with White
Stripe
(2)
2 x 1 (50 x 25)
17E68 Nitrile (NBR)
Low temperature
100 (6,9) 100 (6,9) 100 (6,9) Light Blue
360 (24,8) 300 (20,7) 360 (24,8)
Black with White
Stripe
17E97 Nitrile (NBR) High
pressure and/or erosion
resistance
500 (34,5) 500 (34,5) 500 (34,5)
Black with White
Stripe
1050 (72,4) 800 (55,2) 1050 (72,4) Red Stripe
(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 (6,9) 100 (6,9) 100 (6,9) Light Blue
750 (51,7) 500 (34,5)
(3)
750 (51,7)
Black with White
Stripe
2 (50)
17E68 Nitrile (NBR)
Low temperature
100 (6,9) 100 (6,9) 100 (6,9) Yellow
460 (31,7) 400 (27,6) 460 (31,7) Green
17E97 Nitrile (NBR) High
pressure and/or erosion
resistance
500 (34,5) 500 (34,5) 1050 (72,4) Green
1050 (72,4) 800 (55,2) 1050 (72,4) Red
(2)
or Purple
(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 (6,9) 100 (6,9) 100 (6,9) Yellow
500 (34,5) 500 (34,5)
(3)
750 (51,7) Green
750 (51,7) 500 (34,5)
(3)
750 (51,7) Red
(2)
or Purple
(2)
3 (80)
17E68 Nitrile (NBR)
Low temperature
100 (6,9) 100 (6,9) 100 (6,9) Yellow
360 (24,8) 300 (20,7) 500 (34,5) Light Blue
17E97 Nitrile (NBR)
High-pressure and/or
erosion resistance
500 (34,5) 500 (34,5) 1050 (72,4) Light Blue
1050 (72,4) 800 (55,2) 1050 (72,4) Black
(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 (6,9) 100 (6,9) 100 (6,9) Yellow
500 (34,5) 500 (34,5)
(3)
750 (51,7) Light Blue
750 (51,7) 500 (34,5)
(3)
750 (51,7) Black
(2)
4, 6 x 4,
and 8 x 4
(100, 150 x 100,
and 200 x 100)
17E68 Nitrile (NBR)
Low temperature
100 (6,9) 100 (6,9) 100 (6,9) Yellow
360 (24,8) 300 (20,7) 500 (34,5) Green
17E97 Nitrile (NBR)
High pressure and/or
erosion resistance
100 (6,9) 100 (6,9) 100 (6,9) Yellow
500 (34,5) 500 (34,5) 1050 (72,4) Green
1050 (72,4) 800 (55,2) 1050 (72,4) Red
(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 (6,9) 100 (6,9) 100 (6,9) Yellow
500 (34,5) 500 (34,5)
(3)
750 (51,7) Green
750 (51,7) 500 (34,5)
(3)
750 (51,7) Red
(2)
6, 8 x 6,
and 12 x 6
(150, 200 x 150,
and 300 x 150)
17E97 Nitrile (NBR)
High pressure and/or
erosion resistance
100 (6,9) 100 (6,9) 100 (6,9) Yellow
500 (34,5) 500 (34,5) 1050 (72,4) Green
1050 (72,4) 800 (55,2) 1050 (72,4) Red
(2)
17E88 Fluorocarbon (FKM)
High aromatic hydrocarbon
content resistance
100 (6,9) 100 (6,9) 100 (6,9) Yellow
500 (34,5) 500 (34,5)
(3)
750 (51,7) Green
750 (51,7) 500 (34,5)
(3)
750 (51,7) Red
(2)
8 (200)
17E97 Nitrile (NBR)
High pressure and/or
erosion resistance
100 (6,9) 100 (6,9) 100 (6,9) Yellow
500 (34,5) 500 (34,5) 1050 (72,4) Green
1050 (72,4) 800 (55,2) 1050 (72,4) Red
(2)
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. These are recommendations that provide the best regulator performance for a typical application. Please contact your local Sales Ofce for further information if a deviation
from the standard recommendations is required.
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