6
GAS PRESSURE
The adjacent tables show minimum pressure
losses along the gas supply line depending on
the burner output.
Column 1
Pressure loss at combustion head.
Pressure of the gas at the socket 1)(B)p.7, with
combustion chamber at 0 mbar.
Column 2
Pressure loss of gas train 2)(B)p.7 includes: one
stage or two stage adjustment valve VR, safety
valve VS (both fully open), pressure governor R,
filter F.
The values shown in the various tables refer to:
natural gas G 20 PCI 9.45 kWh/Sm
3
(8.2 Mcal/Sm
3
)
With:
natural gas G 25 PCI 8.13 kWh/Sm
3
(7.0 Mcal/Sm
3
)
multiply the values of the table:
- column 1: by 1.5;
- column 2: by 1.35.
Calculate the approximate maximum output of
the burner in this way:
- subtract the combustion chamber pressure
from the gas pressure measured at test
point 1)(B)p.7.
- Find, in the table relating to the burner con-
cerned, the pressure value closest to the
result of the subtraction.
- Read the corresponding output on the left.
Example - RS 34/1/M MZ:
• Maximum output operation
• Natural gas G 20 PCI 9.45 kWh/Sm
3
• Gas pressure at test point 1)(B)p.7 =8.9 mbar
• Pressure in combustion chamber
= 2 mbar
8.9 - 2 =6.9 mbar
An output of 250 kW shown in table RS 34/1
corresponds to 6.9 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)p.7, set the output required from the
burner:
-
Find the nearest output value in the table for
the burner in question.
-
Read, on the right (column 1) the socket
pressure 1)(B)p.7.
-
Add this value to the estimated pressure in
the combustion chamber.
Example - RS 34/1 MZ:
• Required burner output: 250 kW
• Natural gas G 20 PCI 9.45 kWh/Sm
3
• Pressure of the gas at an output of 250 kW, from
the table RS 34/1 MZ, column 1
=6.9 mbar
• Pressure in combustion chamber
= 2 mbar
6.9 + 2 =8.9 mbar
pressure required at test point 1)(B)p.7.
RS 34/1 MZ One-stage gas train
p (mbar)
RS 44/1 MZ One-stage gas train
p (mbar)
RS 34/1 MZ Two-stage gas train
p (mbar)
kW
1
2
MBC-DLE-120
(Rp 3/4")
MB 407 S2
(Rp 3/4")
MB 410 S2
(Rp 1.1/4")
MB 412 S2
(Rp 1.1/4")
MB 415 S2
(Rp 1.1/2")
MB 420 S2
(Rp 2")
70
0,6
5,2
3,0
--
--
--
--
75
0,6
5,6
3,4
2,1
--
--
--
100 1,0
8,2
5,6
2,9
--
--
--
125 1,4
11,1
8,0
4,2
2,1
--
--
150 2,4
15,7
11,0
5,6
2,8
--
--
175 3,5
21,1
14,4
7,2
3,6
--
--
200 4,6
27,2
18,1
9,0
4,5
--
--
225 5,8
33,9
22,1
11,0
5,5
3,2
--
250 6,9
41,3
26,4
13,2
6,5
3,3
--
275 8,0
49,4
31,3
15,5
7,6
3,8
--
300 9,1
58,0
36,6
18,0
8,7
4,3
--
325 10,2
67,2
42,2
20,5
9,9
4,8
3,2
350 11,3
76,7
47,8
22,9
11,2
5,4
3,4
375 12,4
86,7
53,7
25,4
12,7
5,9
3,8
390 13,1
57,4
27,0
13,5
6,3
4,0
kW
1
2
MB 407 S5
(Rp 3/4")
MB 410 S5
(Rp 1.1/4")
MB 412 S2
(Rp 1.1/4")
MB 415 S2
(Rp 1.1/2")
MB 420 S2
(Rp 2")
100
0,2
5,6
2,9
2,1
3,2
3,2
150
1,6
11,0
5,6
2,8
3,2
3,2
200
3,0
18,1
9,0
4,5
3,2
3,2
250
4,9
26,4
13,2
6,5
3,3
3,2
300
6,9
36,6
18,0
8,7
4,3
3,2
350
8,9
47,8
22,9
11,2
5,4
3,4
400 10,8
59,9
28,1
14,0
6,5
4,1
450 12,8
73,2
33,6
16,8
7,7
4,9
500 14,7
87,6
39,5
19,8
9,0
5,7
550 16,7
103,0
45,8
23,1
10,2
6,6
kW
1
2
MB-ZR 407 S2
(Rp 3/4")
MB-ZR 410 S2
(Rp 1")
MB-ZR 412 S2
(Rp 1.1/4")
MB-ZR 415 S2
(Rp 1.1/2")
MB-ZR 420 S2
(Rp 2")
70 0,6
3,0
2,1
2,1
--
--
75 0,6
3,4
2,1
2,1
--
--
100 1,0
5,6
2,9
2,1
--
--
125 1,4
8,0
4,2
2,1
--
--
150 2,4
11,0
5,6
2,8
--
--
175 3,5
14,4
7,2
3,6
--
--
200 4,6
18,1
9,0
4,5
--
--
225 5,8
22,1
11,0
5,5
3,2
--
250 6,9
26,4
13,2
6,5
3,3
--
275 8,0
31,3
15,5
7,6
3,8
--
300 9,1
36,6
18,0
8,7
4,3
--
325 10,2
42,2
20,5
9,9
4,8
3,2
350 11,3
47,8
22,9
11,2
5,4
3,4
375 12,4
53,7
25,4
12,7
5,9
3,8
390 13,1
57,4
27,0
13,5
6,3
4,0
(A)
Содержание RS 34/1 MZ
Страница 22: ...LED LED 3...
Страница 27: ...5 A 20 C 1013 mbar 0m 9 B EN 676 B 350 Mcal h 50 cm 1 5 m CE B CE B mbar mbar A D8589 B D497 Mcal h kW m...
Страница 33: ...11 10 A B C 7 8 VR VS 4 18 A 3 C A C B D3855 D3854 D3841...
Страница 35: ...13 2 A A CO 100 ppm A A 3 B 5mbar 1mbar C 5 A 4 23 A 100 A A C 4 4 A B RMG 10 D3843 A D3855 D3951...
Страница 37: ...15 TL TS...
Страница 38: ...16 LED 10 3 1 3 1 3 2 3 17 3 1 3 LED 17 170V 1 3 3 LED 1 3 3 3 LED LED LED 10...
Страница 40: ...18 LED 3 LED 3 RMG PC 3002719 2 1 0 4 2 0 8 6 2 8 LED 3 3 10...
Страница 41: ...19 EN 60 335 1 RS 34 44 1 MZ 1 TL 7 2 6 3 TR 4 5 2 6 6A 6A RS 34 44 1 MZ 24 TL 24 D11833...
Страница 43: ...21 RS 34 1 MZ...
Страница 44: ...22 RS 44 1 MZ...
Страница 45: ...23 RS 34 44 1 MZ...
Страница 47: ......