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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/m³ and a kinematic viscosity of
6 mm²/s as per DIN 51603 are used for the pressure loss due to the friction
in the pipe.
5.2.1
Maximum suction line length with lower tank
Nozzle
Inner
capacity
pipe
< 2.5 kg/h
Ø 4 mm
(3 l/h)
Ø 6 mm
Ø 8 mm
5 kg/h
Ø 4 mm
(6 l/h)
Ø 6 mm
Ø 8 mm
7.5 kg/h
Ø 4 mm
(9 l/h)
Ø 6 mm
Ø 8 mm
Mounting
Ø
1.5
2.0
32
> 100
> 100
> 100
> 100
10
81
> 100
> 100
10
54
> 100
> 100
1. If the suction line is
Suction height H [m]
2.5
26
19
> 100
> 100
> 100
8
6
65
49
> 100
> 100
8
6
43
33
> 100
designed as a self-secur-
ing suction line according
to the applicable technical
regulations, remove all
check valves upstream of
the product.
3.0
3.5
13
7
68
36
> 100
4
2
34
18
57
4
2
22
12
71
38
Flow-Control
EN
4.0
1
4
14
1
2
7
0
1
4
12
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