Gas Side Pressure Drops - Riello DB 2 LSE FGR Installation, Use And Maintenance Instructions

3.11

Gas side pressure drops

Gas pressure on the basis of the maximum output developed by
the burner is given by the curves in Fig. 6.
It represents the pressure drop in the combustion head.
Natural gas G 20 - N.C.V. = 10 kWh/Nm
The curves were taken in the following conditions:
• pressure measured at the test point on the pressure switch
downstream from the gas butterfly valve;
• combustion chamber at 0 mbar;
• burner working at full output.
Combustion head pressure drop
60
50
40
30
20
10
0
Butterfly valve pressure drop
10
8
6
4
2
1
0
300
Technical description of the burner
3
500 1000
Burner output - kW
600 900 1200
Burner output - kW
11
Add the pressure of the combustion chamber in
mbar to the value of the combustion head drop.
WARNING
The pressure drop of the completely open butterfly valve is given
in Fig. 7.
1500 2000
1500 1800
GB
20155589
2500
20155591
2100 2400
Fig. 6
Fig. 7
20169116