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Verfügbare Sprachen
Verfügbare Sprachen
Overview
Selection of gas valve assembly
Selection of gas-valve assembly
The gas-pressure loss indicated in the
table is to be added to the furnace
pressure reading (in mbar).
Burner power
(kW)
100
140
200
240
260
G 04.430 DUO
280
PLUS
300
320
340
360
380
400
420
430
Burner
MBVEF 407 MBVEF 412 MBVEF 420
power
(kW)
140
180
220
260
280
G 04.520
300
DUO PLUS
340
380
420
440
460
480
500
520
Example (for burner G 04.520 DUO PLUS):
· Specifications:
Type of gas supply: Natural gas E
–
Required burner power: 500 kW
–
Furnace pressure at rated boiler load: 2 mbar
–
Gas flow pressure at supply station at rated boiler load : 20 mbar
–
Pressure loss in gas pipe at rated boiler load : 1 mbar
–
· Selected gas valve assembly: MBVEF 420
· Testing of selection:
– Gas pressure loss (from table): 16 mbar
– Furnace pressure:
– Pressure loss in gas pipe : 1 mbar
– Total
Given: Gas flow pressure at supply station 20 mbar > 19 mbar ð Selection MBVEF 420 correct.
–
IMPORTANT:
The gas-flow pressure determined is to
be maintained at the inlet of the
gas-valve assembly. When determining
the gas-flow pressure required at the
transfer point, remember to take into
account the resistance of the burner
feed-conduit and its fittings (ball valve,
TAS, additional filter or meter).
MBVEF 407
MBVEF 412
Natural gas E Hi = 10.365 kWh/m
Gas pressure loss (from entry of gas valve assembly)
15
15
15
15
15
15
21
15
25
15
29
15
33
15
38
15
43
15
48
15
53
16
59
17
65
19
68
20
Natural gas E Hi = 10.365 kWh/m
Gas pressure loss (from entry of gas valve assembly)
15
15
15
15
15
15
19
15
15
27
15
15
31
15
15
36
15
15
46
15
15
58
18
15
71
22
15
77
24
15
85
26
15
92
28
15
100
31
16
108
33
17
2 mbar
19 mbar
06/2005 - Art. Nr. 13 018 084A
MBVEF 407
MBVEF 412
3
Natural gas LL Hi = 8.83 kWh/m
15
15
15
15
26
15
38
15
44
15
51
15
59
15
67
15
75
15
84
16
94
18
104
20
115
22
121
23
MBVEF 412
MBVEF 420
3
Natural gas LL Hi = 8.83 kWh/m
15
15
15
15
15
15
15
15
15
15
15
15
18
15
23
15
28
15
31
16
34
17
37
19
40
20
43
22
MBVEF 407
MBVEF 412
3
Propane gas Hi=25.89kWh/m³
15
15
15
15
15
15
15
15
15
15
17
15
20
15
22
15
25
15
28
15
32
15
35
15
39
15
40
15
MBVEF 407
MBVEF 412
3
Propane gas Hi=25.89kWh/m³
15
15
15
15
15
15
15
15
15
15
15
15
18
15
23
15
28
15
30
15
33
15
36
17
39
18
42
20
EN
23
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