Publicidad
Idiomas disponibles
Idiomas disponibles
RS 190
kW
1
2
1280
7.0
1.3
1400
7.3
1.6
1500
7.6
1.8
1600
8.0
2.1
1700
8.7
2.4
1800
9.3
2.7
1900
10.2
3.0
2000
11.3
3.3
2100
12.5
3.6
2290
15.0
4.3
(A)
MB 420
MBC 1200
MBC 1900
MBC 3100
(B)
p (mbar)
3
3970181
3970221
3970222
3970182
3970225
3970226
28.6
10.3
7.2
33.5
12.1
8.2
37.7
13.6
9.0
41.8
15.2
9.9
46.0
16.7
10.7
50.2
18.2
11.6
54.3
19.8
12.5
59.3
21.6
13.6
64.4
23.5
14.8
74.1
27.1
17.0
D3734
GAS PRESSURE
The adjacent table shows minimum pressure
losses along the gas supply line depending on
the burner output in 2nd stage operation.
Column 1
3970223
Pressure loss at combustion head.
3970227
Gas pressure measured at test point 1)(B), with:
4.8
• Combustion chamber at 0 mbar
5.2
• Burner operating in 2nd stage
• Combustion head adjusted as indicated in
5.5
diagram (C)p. 7.
5.8
Column 2
6.1
Pressure loss at gas butterfly valve 2)(B) with
6.5
maximum opening: 90°.
6.8
Column 3
7.3
Pressure loss of gas train 3)(B) includes: adjust-
ment valve VR, safety valve VS (both fully
7.7
open), pressure governor R, filter F.
8.6
The values shown in the table refer to:
natural gas G 20 NCV 9.45 kWh/Sm
(8,2 Mcal/Sm
With:
natural gas G 25 NCV 8,13 kWh/Sm
(7,0 Mcal/Sm
- column 1 - 2: by 1.5
- column 3:
Calculate the approximate 2nd stage output of
the burner thus:
- Subtract the combustion chamber pressure
from the gas pressure measured at test point
1)(B).
- Find the nearest pressure value to your result
in column 1 of the table (A).
- Read off the corresponding output on the left.
Example:
• 2nd stage operation
• Natural gas G 20 NCV 9.45 kWh/Sm
• Gas pressure at test point 1)(B)
• Pressure in combustion chamber = 3 mbar
A 2nd stage output of 1600 kW shown in Table
(A) corresponds to 8 mbar pressure, column 1.
This value serves as a rough guide, the effective
delivery must be measured at the gas meter.
To calculate the required gas pressure at test
point 1)(B), set the output required from the
burner in 2nd stage operation:
- Find the nearest output value in the table (A).
- Read off the pressure at test point 1)(B) on
the right in column 1.
- Add this value to the estimated pressure in
the combustion chamber.
Example:
• Required burner output in 2nd stage opera-
tion: 1600 kW
• Natural gas G 20 NCV 9.45 kWh/Sm
• Gas pressure at burner output of 1600 kW,
taken from table (A), column 1
• Pressure in combustion chamber = 3 mbar
pressure required at test point 1)(B).
5
3
3
)
3
3
) multiply tabulated values:
by 1.35.
3
= 11 mbar
11 - 3= 8 mbar
3
= 8 mbar
8 + 3 = 11 mbar
Publicidad
