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 product 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.
 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 max-
imum suction vacuum must not exceed -0.4 bar (cavitation limit). An addi-
tional 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
9