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CAPACITY CURVES
Capacity curve combination gas valves
3 (
4 /
) "
D
N
2
0
8
6
5
4
3
2
1
0.8
0.6
0.5
0.4
0.3
0.2
Vn (m /h)
3
0.1
Air
∆
v=1
Methane
∆v=0.64
Fig. 1. Capacity curve for VQ400 Series class „A" combination valves
INSTALLATION
See installation drawing on page 4.
IMPORTANT
1. Read these instructions carefully. Failure to follow the
instructions could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. The installation has to be carried out by qualified
personnel only.
4. Carry out a thorough checkout when installation is
completed.
Table 3. Capacity in m
1 (
) "
D
N
2
5
1
1
60
50
40
30
20
10
8
6
5
4
3
2
1
1
2
3
4
2
3
4
5
/h air at ∆p = 2,5mbar
3
1 (
1
4 /
) "
D
N
3
2
1 (
2
5
DN25
DN20
5
6
8
10
20
6
8
10
20
30
WARNING
• Turn off gas supply before installation.
• Disconnect power supply to the valve actuator
before beginning the installation to prevent electrical
shock and damage to the equipment.
•
Do not remove the seal over valve inlet and outlet
until ready to connect piping.
•
The valve must be installed so that the arrow on
the valve points in the direction of the gas flow (gas
pressure helps to close the valve).
Mounting position
The gas valve can be mounted plus or minus 90 degrees
from the vertical.
Mounting location
The distance between the gas valve and the wall/ground must
be at least 30 cm.
3
1
2 /
) "
D
N
4
0
2 (
3
1
DN40
DN32
30
40 50 60
80
100
40
50
60
80
100
MU2C-0042SZ20 R0505
) "
D
N
5
0
4
0
DN50
200
300
200
300
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