EN2R--9018 9704R1--NE
7
CAPACITY CURVES
Capacity curve combination gas valves
Table 1. Capacity in m
3
/
h
air at
a
p = 2,5 mbar
3/4” DN20
1” DN25
1 1/4” DN32
1 1/2” DN40
2” DN50
8
11
25
31
40
60
50
40
30
20
10
8
6
5
1
2
4
3
4
3
2
1
0.1
0.2
0.3
0.4
0.5
0.6
0.8
10
20
30
40
50 60
80
200
300
p(
k
P
a
)
p
(m
bar
)
Vn (m
3
/h)
Air dv=1
Methane dv 0.64
100
10
8
6
5
4
3
2
1
2
3
4
5
6
8
100
300
200
80
60
50
40
30
20
a a
5
6
DN20
DN40
DN50
DN32
DN25
Fig. 1. Capacity curves for VQ400 Series class “A” combination valves