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Mounting and commissioning
4
Mounting and commissioning
4.1
Determining the cross section of the suction line
4.2
Determination of suction line length
18
FloCo-Top-1 is installed upstream of the burner. The fitting may be
installed above or below the tank level.
When dual-pipe systems are converted to single-pipe operation, the
flow rate of the oil in the suction line is reduced.
In order to avoid air cushions in higher pipe sections and pipes
with gradients (shutdowns due to fault conditions), check and
size the cross section of the suction line according to DIN 4755-
2 (flow rate 0.2 to 0.5 m/s).
Fig. 10: Nomograph
Example: A pipe with a pipe diameter 8 x 1 mm (nominal diameter 6)
is required for a volume of 20 l/h and an average flow speed of ap-
prox. 0.23 m/s.
For the determination of the maximum possible suction line length,
the table assumes that the maximum suction vacuum is not sup-
posed to exceed -0.4 bar (cavitation limit). An additional pressure
loss of 50 mbar is considered for the resulting filter pollution.
The maximum density of fuel of EL of 860 kg/m³ and a kinematic vis-
cosity of 6 mm²/s as per DIN 51603 is used for the pressure loss due
to the friction in the pipe.
– English –
a
Nozzle consumption burner [l/h]
b
Inside diameter (nominal diameter) of
the suction line [mm]
c
Flow speed of the fuel oil [m/s]
d
< Ø 4 not advisable
e
Recommended range as per DIN 4755-
2
FloCo-Top-1K / 223
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