INSTRUCTIONS PUMP TYPE DANFOSS BFP 21 L5
Components
1 Nozzle port G1/8"
2. Pressure gauge port G1/8"
3. Pressure adjustment, 4 mm allen key
4. Cartridge ilter
5. Vacuum gauge port G1/8"
6. Return line G¼"
7. Suction line G¼"
8. Return plug
9. Pressure gauge port G 1/8"
Technical data
Viscosity range:
1,8-12,0 mm
2
/s
Pressure range:
7-15 bar
Rated voltage of coil:
220/240V
50/60 Hz
Oil temperature:
-10 to +70°C
Suction line tables
The suction line tables consist of
theoretically calculated values where
the pipe dimensions and oil velocity
have been matched so that turbulences
will not occur. Such turbulences 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 ilter.
The sum of these individual resistances
is so insigniicant 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 according
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 capacit of
10,0 kg/h. Max. permissible pressure
at the suction and pressure side is
2,0 bar.
Purging
On 1-pipe systems it is necessary to
purge the pump. On 2-pipe systems
purging is automatic through the
return line.
171 505 09 10-01
Two-pipe system
Height
Pipe diameter
H
ø6 mm ø8 mm ø10 mm
m m m m
0
11
34
84
-0,5
10
30
74
-1,0
8
26
64
-1,5
7
22
54
-2,0
6
18
44
-2,5
4
14
34
-3,0
3
10
24
-3,5
2
6
14
4,0
1
2
4
Height
Pipe diameter
H
ø4 mm ø5 mm ø6 mm
m m m m
Height
Pipe diameter
H
ø6 mm ø8 mm ø10 mm
m m m m
4,0
21
67
100
3,5
20
63
100
3,0
19
59
100
2,5
17
55
100
2,0
16
51
100
1,5
15
46
100
1,0
13
42
100
0,5
12
38
94
Height
Pipe diameter
H
ø5 mm ø6 mm ø8 mm
m m m m
4,0
31
65
100
3,5
27
57
100
3,0
23
49
100
2,5
20
40
100
2,0
16
32
100
1,5
12
24
77
1,0
8
16
51
0,5
4
8
26
1-pipe system
1-pipe system
With an underlying tank a 1-pipe-
system is not recommended
Two-pipe system
H
H
