Bulletin 71.1:SR5
11
SPRING RANGE,
PSIG (bar)
SET PRESSURE,
PSIG (bar)
INLET PRESSURE,
PSIG (bar)
Cv AT % DROOP
1-1/2-inch (DN 40) Full Port
Elastomer Diaphragm Metal Diaphragm
10% 20% 30% 10% 20% 30%
5 to 25
(0,4 to 1,7)
5 (0,4)
25 (1,7) 0.59 1.02 1.24 1.36 1.38 1.40
50 (3,4) 1.98 2.37 2.77 1.45 1.61 1.89
75 (5,2) 1.86 2.10 2.39 1.51 1.72 2.12
15 (1,0)
25 (1,7) 2.02 4.37 6.40 1.94 2.33 3.27
50 (3,4) 2.23 3.42 4.60 1.76 2.21 2.97
75 (5,2) 2.39 3.20 4.07 1.77 2.25 2.95
25 (1,7)
25 (1,7) 3.48 6.14 7.55 1.80 2.47 4.08
50 (3,4) 3.21 5.12 6.52 1.72 2.38 3.67
75 (5,2) 3.21 4.60 5.94 1.77 2.44 3.48
10 to 50
(0,7 to 3,4)
10 (0,7)
25 (1,7) 1.50 2.14 3.22 1.52 2.16 3.27
50 (3,4) 1.53 2.02 2.63 1.57 2.07 2.71
100 (6,9) 1.57 2.01 2.45 1.63 2.08 2.54
25 (1,7)
50 (3,4) 2.32 4.24 6.05 2.14 3.36 4.74
75 (5,2) 2.35 3.65 4.94 1.94 2.91 4.07
100 (6,9) 2.40 3.40 4.42 1.88 2.72 3.77
50 (3,4)
75 (5,2) 6.00 9.26 11.53 3.35 5.09 6.76
100 (6,9) 4.53 7.23 8.86 3.17 4.73 6.02
125 (8,6) 3.84 6.21 7.41 3.15 4.60 5.65
25 to 75
(1,7 to 5,2)
25 (1,7)
50 (3,4) 3.78 4.97 6.67 2.47 4.43 5.47
100 (6,9) 3.33 4.60 5.46 2.11 2.95 3.77
125 (8,6) 3.28 4.57 5.25 2.06 2.67 3.43
50 (3,4)
75 (5,2) 4.90 7.21 9.10 3.31 5.16 6.33
100 (6,9) 3.88 6.03 7.45 2.40 4.12 5.24
125 (8,6) 3.41 5.46 6.58 1.96 3.59 4.66
150 (10) 3.13 5.12 6.03 1.68 3.27 4.30
75 (5,2)
100 (6,9) 5.24 7.06 9.84 4.33 5.65 7.52
125 (8,6) 4.83 6.52 8.70 3.58 5.00 6.62
150 (10) 4.72 6.30 8.09 3.23 4.69 6.12
175 (12) 4.68 6.19 7.70 3.03 4.51 5.80
35 to 100
(2,4 to 6,9)
35 (2,4)
50 (3,4) 3.51 5.27 7.12 3.53 4.57 6.02
75 (5,2) 2.74 4.14 5.57 2.79 3.53 4.67
100 (6,9) 2.50 3.72 4.92 2.56 3.13 4.11
125 (8,6) 2.38 3.49 4.56 2.45 2.91 3.78
50 (3,4)
75 (5,2) 4.88 6.88 8.31 2.90 3.97 5.58
100 (6,9) 3.70 5.45 6.74 2.26 3.27 4.61
125 (8,6) 3.14 4.74 5.91 1.97 2.92 4.10
150 (10) 2.80 4.29 5.38 1.79 2.71 3.78
75 (5,2)
100 (6,9) 5.88 8.19 10.19 3.09 4.76 6.70
125 (8,6) 4.56 6.46 8.37 2.72 4.38 6.01
150 (10) 3.91 5.52 7.33 2.58 4.23 5.65
175 (12) 3.52 4.91 6.64 2.50 4.15 5.43
100 (6,9)
125 (8,6) 4.56 7.66 10.59 4.41 6.37 8.21
150 (10) 4.89 6.96 9.55 3.82 5.63 7.28
175 (12) 5.20 6.62 8.96 3.57 5.25 6.74
200 (14) 5.46 6.42 3.43 5.03
Shaded areas indicate conditions where maximum differential pressure for the spring range is exceeded.
Table 7. Cv Coefcients for 1-1/2-inch (DN 40) Body (continued)
(1 pages)
(20 pages)
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