Technical Instructions
Flowrite 599 Series Two-Way Valves, 1/2 to 2-Inch, Bronze Body, ANSI 250
Document Number 155-184P25
May 2, 2016
Page 6
Siemens Industry, Inc.
Table 3. Maximum Water Capacity - U.S. Gallons per Minute.
Valve
Size
in
inches
Pressure Differential - psi
Cv\1
2
3
4
5
6
8
10
15
20
25
30
40
50
60
75
1/2
1.0
1.4
1.7
2.0
2.2
2.5
2.8
3.2
3.9
4.5
5.0
5.5
6.3
7.1
7.8
8.7
1.6
2.3
2.8
3.2
3.6
3.9
4.5
5.1
6.2
7.2
8.0
8.8
10.1
11.3 12.4 13.9
2.5
3.5
4.3
5.0
5.6
6.1
7.1
7.9
97
11.2 12.5 13.7 15.8
17.7 19.4
22
4
5.7
7
8.0
8.9
10
11.3 12.6 15.5 17.9 20.0 21.9
25
28
31
35
3/4
6
8.9
10.9 12.6 14.1 15.4 17.8
20
24
28
32
35
40
45
49
55
1
10 14.1 17.3
20
22
24
28
32
39
45
50
55
63
71
77
87
1-1/4
16
23
28
32
36
39
45
51
62
72
80
88
101
113
124
139
1-1/2
25
35
43
50
56
61
71
79
97
112 125
137
158
177
194
217
2
40
57
69
80
89
98
113
126
155 179 200
219
253
283
310
346
Table 4. Maximum Water Capacity - Cubic Meters per Hour (m
3
/hr).
Valve Size
mm
Pressure Differential - kPa
1
10
20
30
40
50
60
80
Kvs/
100
150 200 300 400 500
15
0.09 0.3 0.4 0.5
0.5
0.6
0.7
0.8
0.9
1.0
1.2
1.5
1.7
1.9
0.14 0.4 0.6 0.8
0.9
1.0
1.1
1.2
1.4
1.7
1.9
2.4
2.7
3.1
0.2 0.7 1.0 1.2
1.4
1.5
1.7
1.9
2.2
2.6
3.0
3.7
4.3
4.8
0.3 1.1 1.5 1.9
2.2
2.4
2.7
3.1
3.4
4.2
4.9
6.0
6.9
7.7
20
0.5 1.7 2.4 3.0
3.4
3.8
4.2
4.9
5.4
6.7
7.7
9.4 10.9 12.1
25
0.9 2.7 3.8 4.7
5.4
6.1
6.7
7.7
8.6 10.5 12.2 14.9 17.2 19.2
32
1.4 4.4 6.2 7.6
8.7
9.8 10.7 12.3 13.8 16.9 19.5 23.9 27.6 30.9
40
2.2 6.8 9.6 11.8 13.6 15.2 16.7 19.2 22
26
30
37
43
48
50
3.4 10.9 15.4 18.8 22
24
27
31
34
42
49
60
69
77
