Determining The Cross Section Of The Suction Line; Determining The Suction Line Length - afriso FloCo-Top-1K Manual De Instrucciones

5 Mounting
Install the product upstream of the burner. The fitting may be installed above
or below the tank level.
5.1

Determining the cross section of the suction line

When dual-pipe systems are converted to single-pipe operation, the flow rate
of the oil in the suction line is reduced.
1. Verify that the cross section of the suction line according complies with
DIN 4755-2 (flow rate 0.2 to 0.5 m/s) in order to help avoid air cushions in
higher pipe sections and pipes with gradients (shutdowns due to error
conditions).
A
Fig. 1: Nomograph; Example: Volume = 20 l/h, flow rate = Ø ~ 0.23 m/s. A pipe with
a pipe diameter of 8 x 1 mm (nominal diameter 6) is required.
5.2

Determining the suction line length

For the determination of the maximum possible suction line length, the table
assumes that the maximum suction vacuum is not supposed 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/m
2
6 mm /s as per DIN 51603 are used for the pressure loss due to the friction
in the pipe.
Mounting
B C
D
A. Nozzle consumption
burner Brenner [l/h]
B. Inside diameter (nominal
diameter) of the suction
line [mm]
E
C. Flow rate of the fuel oil [m/
s]
D. < Ø 4 not advisable
E. Recommended range as
per DIN 4755-2
3
and a kinematic viscosity of
FloCo-Top-1K
EN
10