Riello DB 3 LSM C13 Installation, Use And Maintenance Instructions page 39

2.6 Gas side pressure drop
Head pressure drop
60
50
40
m bar
30
20
10
0 1000
Fig. 8
Butterfly valve pressure drop
26
24
18
m bar
12
6
0 1000 2000
Fig. 9
8
2000 4000 6000
Pb (Burner output)
4000
Pb (Burner output)
CHAPTER
Gas pressure on the basis of the maxi-
mum output developed by the burner is
D8257
given by the curves in Fig. 8.
It represents the pressure drop in the
combustion head.
Natural gas G 20 - Net calorific value =
10 kWh/Nm
The curves were taken in the following
conditions:
•
•
•
KW
8000
The pressure drop of the completely
[kW]
open butterfly valve is given in Fig. 9.
D8258
6000
KW
[kW]
2
Burner description
3
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.