Data Sheet

Bulletin 71.1:SR5
12
SPRING RANGE,
PSIG (bar)
SET PRESSURE,
PSIG (bar)
INLET PRESSURE,
PSIG (bar)
Cv AT % DROOP
2-inch (DN 50)
Elastomer Diaphragm Metal Diaphragm
10% 20% 30% 10% 20% 30%
10 to 25
(0,7 to 1,7)
10 (0,7)
25 (1,7) 7.97 11.12 15.04 6.71 9.41 11.05
50 (3,4) 7.27 8.67 12.17 5.41 7.28 8.75
15 (1,0)
25 (1,7) 10.97 15.05 20.61 7.51 10.76 14.75
50 (3,4) 7.30 11.44 15.60 6.17 8.15 11.08
25 (1,7)
50 (3,4) 10.15 17.09 22.48 7.64 10.47 15.10
75 (5,2) 8.58 13.70 17.79 6.06 9.29 12.55
15 to 50
(1,0 to 3,4)
15 (1,0)
25 (1,7) 9.90 12.94 17.79 7.42 10.20 12.55
50 (3,4) 7.12 9.44 13.05 5.80 7.57 9.75
75 (5,2) 6.15 8.18 10.62 5.36 6.66 8.65
100 (6,9) 5.47 7.31 9.10 5.02 6.03 7.85
125 (8,6) 4.95 6.63 8.24 4.72 5.55 7.22
25 (1,7)
50 (3,4) 7.70 14.67 18.37 7.12 9.86 13.81
75 (5,2) 7.15 12.16 15.52 6.06 8.91 12.00
100 (6,9) 6.69 10.71 13.65 5.37 8.19 10.56
125 (8,6) 6.15 9.59 12.14 4.81 7.54 9.37
50 (3,4)
75 (5,2) 12.15 19.35 24.67 8.06 13.57 19.05
100 (6,9) 11.40 17.07 21.17 7.85 12.84 16.94
125 (8,6) 10.41 15.11 18.78 7.36 11.79 15.27
150 (10) 9.45 13.45 16.90 6.86 10.72 13.87
25 to 75
(1,7 to 5,2)
25 (1,7)
50 (3,4) 8.87 13.48 16.78 6.70 8.94 12.52
75 (5,2) 7.06 11.43 14.81 6.19 8.32 11.08
100 (6,9) 6.88 10.37 12.95 5.52 7.91 10.15
125 (8,6) 6.51 9.53 11.31 4.88 7.41 9.33
150 (10) 5.78 8.75 10.03 4.40 6.87 8.59
50 (3,4)
75 (5,2) 11.63 18.55 23.38 7.80 13.00 18.36
100 (6,9) 9.07 15.54 19.89 7.39 11.79 16.15
125 (8,6) 8.64 14.03 18.04 7.08 10.94 14.62
150 (10) 8.60 12.95 16.63 6.77 10.22 13.41
175 (12) 8.38 12.01 15.26 6.46 9.60 12.49
75 (5,2)
100 (6,9) 14.25 20.63 24.79 10.23 17.45 23.33
125 (8,6) 11.53 18.18 22.23 8.94 14.73 20.52
150 (10) 10.35 16.27 20.45 8.11 13.66 18.94
175 (12) 9.74 14.90 18.89 7.69 12.90 17.53
Table 7. Cv Coefcients for 2-inch (DN 50) Body (continued)