English (GB)
25
5.5 Installation tips
•
For non-degassing media with a viscosity similar
to water, the pump can be mounted on the tank
(observe the permissible suction lift).
•
Flooded suction preferred (not possible with
Plus
3
system).
•
For media with a tendency to sedimentation,
install the suction line with filter (15i) so that the
suction valve remains a few millimetres above
the possible level of sedimentation.
Fig. 14
Tank installation
With open outflow of the dosing medium or low
counter-pressure
A positive pressure difference of at least 1 bar must
be ensured between the counter-pressure at the
injection point and the pressure of the dosing
medium at the pump suction valve.
•
If this cannot be ensured, install a
pressure-loading valve (7i) immediately before
the outlet or the injection unit.
Fig. 15
Installation with pressure-loading valve
•
To avoid the siphon effect, install a
pressure-loading valve (7i) in the discharge line
and, if necessary, a solenoid valve (14i) in the
suction line.
Fig. 16
Installation to avoid the siphon effect
•
To protect the dosing pump against excessive
pressure build-up, install a relief valve (6i) in the
discharge line.
•
For degassing media:
– Flooded suction (not with Plus
3
system).
– Install a filter (15i) in the suction line to prevent
the valves being contaminated.
Fig. 17
Installation with relief valve and filter
•
When installing the suction line, observe the
following:
– Keep the suction line as short as possible.
Prevent it from becoming tangled.
– If necessary, use swept bends instead of
elbows.
– Always route the suction line up towards the
suction valve.
– Avoid loops as they may cause air bubbles.
Fig. 18
Installation of suction line
T
M
03
62
27
45
0
6
TM
03
62
29
45
06
> 10 mm
< 1.5 m
-[p]
13i
J
6i
10i
ca. 5-10 mm
15i
1.5 m
Approx.
5-10 mm
> 10 mm
7i
>
p _ 1bar
p
1 bar
TM
03
62
30
45
06
TM
0
3
6
231
4
506
T
M
03
62
32
45
06
7i
14i
1
2
>
p -p _ 1bar
p
1
p
2
p
2
-p
1
1 bar
15i
10i
6i
p
