Riello DB 4 SM BLU, Installation, Use And Maintenance Instructions

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8
CHAPTER
2
Burner description
2.6 Gas side pressure drop
6
mbar
KW
0 1000 2000 4000 6000
12
18
24
26
G
2
0
G
2
5
0 1000 2000 4000 6000 8000
60
50
40
30
20
10
mbar
KW
G2
0
G2
5
Gas pressure on the basis of
the maximum output developed
by the burner is 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
3
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 out-
put.
The pressure drop of the com-
pletely open butterfly valve is
given in Fig. 9.
D8257
Butterfly valve pressure drop
D8258
Pb
(Burner output)
[kW]
Fig. 8
Head pressure drop

p
[mbar]
Pb
(Burner output)
[kW]
Fig. 9

p
[mbar]