Optimum Installation; Installation Tips - Grundfos DMH 28X Manual Del Usuario

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6.5 Optimum installation

1i
Fig. 10 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
8i
2i
Max. 1 m
max. 1m
6i
4i
3i

6.6 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.
Fig. 11 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. 12 Installation of suction line
9i
7i
10i
5i
12i
11i
21

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