28
Bentone
Two pipe lift system
Zweistranginstallation - Tank tiefer als Pumpe
Installation bitube en aspiration
Impianti bitubo in aspirazione
H
H max. = 4,5 m
d
6.1.1.2 Underlying tank
1-pipe system
With an underlying tank a 1-pipe-system is not recommended
Two-pipe system
e
0
15
50
124 150
0,5
13
44
109 150
1
11
38
95
150
2
7
26
66
138
3
3
14
37
79
8
4
19
11
38
96
150
7
27
71
150
20
54
116 150
16
46
100 150
9
33
84
150
6
24
62
132
17
48
103 150
14
40
88
150
8
29
73
150
4
20
54
115
15
41
89
150
12
34
76
144
5
19
51
107
2
13
37
80
9
28
61
116
7
23
52
100
10
28
60
6
20
44
4
14
33
65
11
28
55
5
14
9
6
14
4
11
d (mm)
35/45
55
65
75
95
60
77
102
130
150
Pump/Pumpe
Pompe/Pompa
Q** (l/h)
6
8
10
12
6
8
10
12
6
8
10
12
8
10
12
14
8
10
12
14
H (m)
The suction line tables consist of theoretically calculated values where the
pipe dimensions and oil velocity have been matched so that tur-bulences will
not occur. Such tur-bulences will result in increased pressure losses and in
acoustic noise in the pipe system. In addition to drawn copper piping a pipe
system usually comprises 4 elbows, a non-return valve, a cut-off valve and
an external oil filter.
The sum of these individual resi-stances is so insignificant that they can be
disregarded. The tables do not include any lengths exceeding 100 m as
experience shows that longer lengths are not needed.
The tables apply to a standard fuel oil of normal commercial quality accor-
ding to current standards. On commis- sioning with an empty tube system
the oil pump should not be run without oil for more than 5 min. (a condition is
that the pump is being lubricated during operation).
The tables state the total suction line length in metres at a nozzle capacity of
9,5 Gph. Max. permissible pressure at the suction and pressure side is 2,0
bar.
