Grundfos DMX 226 Installatie- En Bedieningsinstructies pagina 18
Dosing pump
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Zie ook voor DMX 226:
- Installatie- en bedieningsinstructies (36 pagina's) ,
- Installatie- en bedieningsinstructies (14 pagina's)
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5. Installation
5.1 Optimum installation
1i
Fig. 2
Example of optimum installation
Pos.
Components
1i
Dosing tank
2i
Electric agitator
3i
Extraction device
4i
Suction pulsation damper
5i
Dosing pump
6i
Relief valve
7i
Pressure-loading valve
8i
Pulsation damper
9i
Measuring glass
10i
Injection unit
5.2 Installation tips
•
For easy deaeration of the dosing head, install a ball valve
(11i) with bypass line (back to the dosing tank) immediately
after the discharge valve.
•
In the case of long discharge lines, install a non-return valve
(12i) in the discharge line.
11i
Fig. 3
Installation with ball valve and non-return valve
•
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 which may cause air bubbles.
Fig. 4
Installation of suction line
18
2i
4i
3i
12i
8i
9i
7i
10i
Max. 1 m
max. 1m
6i
5i
•
For non-degassing media with a viscosity similar to water, the
pump can be mounted on the tank (observe the maximum
suction height).
•
Flooded suction preferred.
•
For media with a tendency to sedimentation, install the suction
line with filter (13i) so that the suction valve remains a few
millimetres above the possible level of sedimentation.
6i
13i
Fig. 5
Tank installation
•
Note for suction-side installation: In dosing systems with a
suction line longer than 1 metre, depending on the dosing flow,
it may be necessary to install a properly sized pulsation
damper (4i) immediately before the pump suction valve.
4i
Fig. 6
Installation with suction-side pulsation damper
p
10i
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