Optimum Installation; Installation Tips - Grundfos DMH 28X Installationsanleitung

6.5 Optimum installation

1i
Fig. 8 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. 9
• 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. 10 Installation of suction line
9i
7i
10i
5i
12i
11i
Installation with ball valve and non-return valve
19