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Kv values:
www.gemu-group.com
Standard ball (code D)
DN
NPS
Kv values
8
1/4"
8.0
10
3/8"
8.0
15
1/2"
17.0
20
3/4"
34.0
25
1"
60.0
32
1¼"
94.0
40
1½"
213.0
50
2"
366.0
65
2½"
595.0
80
3"
935.0
100
4"
1700.0
Kv values in m³/h
Diagrammatic view
100
75
50
25
0
0 10
30
50
Opening angle of standard ball [°]
V-ball 30° (code U)
DN
NPS
0
8
1/4"
0
10
3/8"
0
15
1/2"
0
20
3/4"
0
25
1"
0
32
1¼"
0
40
1½"
0
50
2"
0
65
2½"
0
80
3"
0
100
4"
0
Kv values in m³/h
70
90
15%
20%
30%
40%
0.019 0.044 0.088 0.151 0.232 0.327 0.446 0.576 0.727 0.885
0.021
0.05
0.1
0.172 0.265 0.374
0.085 0.085
0.17
0.255 0.425
0.085
0.17
0.425 0.595 0.935
0.085 0.255
0.68
1.105 1.955 2.975 4.335 5.961 8.128
0.17
0.34
0.935
1.7
0.255
0.51
1.36
2.55
0.34
1.02
3.23
5.1
0.34
0.85
3.4
6.8
0.425
1.02
3.4
6.8
0.51
1.7
5.1
12.75 24.65
13 / 55
7 Ball valve technical data
Opening angle
50%
60%
70%
0.51
0.68
0.935
1.53
2.04
3.145 4.675
6.8
4.25
6.375
9.35
8.5
12.75 19.55 26.35 36.55
10.2
15.3
23.8
11.9
19.55 28.05
40.8
60.35
80%
90%
100%
0.659
0.83
1.012
1.36
1.87
2.21
2.805 3.825
4.59
8.5
8.5
11.05 12.75
11.9
14.45
17.0
51.0
31.45
52.7
63.75
39.1
55.25
69.7
85.0
110.5 135.2
GEMÜ B52
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