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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)
150
160
180
200
220
240
G 04.430 DUO
260
280
300
320
340
360
380
400
420
430
Example:
· Specifications:
Type of gas supply: Natural gas E
–
Required burner power: 400 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: MZRDLE 412
· Testing of selection:
Gas pressure loss (from table):
–
Furnace pressure:
–
Pressure loss in gas pipe :
–
Total
–
Given: Gas flow pressure 20 mbar > 19 mbar ð Selection MBZRDLE 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).
MBZRDLE 407
MBZRDLE 412
3
Nat.gas E Hi = 10.365 kWh/m
Gas pressure loss (from entry of
15
15
15
15
15
15
15
15
18
15
21
15
25
15
29
15
33
15
38
15
43
15
48
15
53
15
59
16
65
18
68
19
16 mbar
2 mbar
1 mbar
19 mbar
03/2005 - Art. Nr. 13 018 082A
MBZRDLE 407
MBZRDLE 412
3
Nat.gas LL Hi = 8.83 kWh/m
gas valve assembly)
15
15
15
15
15
15
17
15
21
15
25
15
29
15
34
15
39
15
44
16
50
18
56
20
62
23
69
25
76
28
80
29
MBZRDLE 407
Propane gas
Hi=25.89kWh/m³
15
15
15
15
15
15
15
15
15
15
15
15
15
15
16
15
19
15
21
15
24
15
27
15
30
15
EN
EN
EN
34
15
37
15
39
16
23
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