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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
MBVEF 407
power
Natural gas E Hi = 10.365 kWh/m
(kW)
85
105
120
135
G 03.240
DUO PLUS
150
165
180
195
210
225
240
Burner
MBVEF 407
power
Natural gas E Hi = 10.365 kWh/m
(kW)
100
120
140
160
G 03.300
DUO PLUS
180
200
220
240
260
280
300
Example (for burner G 03.300 DUO PLUS):
· Specifications:
Type of gas supply: Natural gas E
–
Gas flow pressure: 20 mbar (note: at inlet of gas valve assembly)
–
Required burner power: 240 kW
–
Furnace pressure at rated boiler load: 2.5 mbar
–
· Condition: Operating point must lie within the permitted operating range of the burner.
· Selected gas valve assembly: MBVEF 412
· Testing of selection:
– Gas pressure loss (from table): 10 mbar
– Furnace pressure:
Total
Given: Gas flow pressure 20 mbar >12.5 mbar ð Selection MBVEF 412 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 412
3
Gas pressure loss (from entry of gas valve assembly)
5
2
7
3
10
4
12
5
15
6
18
7
22
8
25
10
29
11
34
13
38
15
MBVEF 412
3
Gas pressure loss (from entry of gas valve assembly)
5
2
7
3
10
3
13
5
16
6
20
7
24
9
28
10
33
12
39
14
44
16
2.5 mbar
12.5 mbar
05/2005 - Art. Nr. 13 018 071A
MBVEF 407
MBVEF 412
Natural gas LL Hi = 8.83 kWh/m
5
2
8
3
11
5
13
6
17
7
20
9
24
10
28
12
32
14
37
16
42
18
MBVEF 407
MBVEF 412
Natural gas LL Hi = 8.83 kWh/m
7
2
10
3
14
4
19
6
23
7
29
9
35
11
42
13
49
15
57
18
65
20
MBVEF 407
3
Propane gas Hi=25.89kWh/m³
2
4
5
6
7
9
10
12
14
16
18
MBVEF 407
3
Propane gas Hi=25.89kWh/m³
2
3
4
6
7
9
10
12
15
17
20
EN
21
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