Multi-layer diaphragm pump
Serie 409.2 ML
Operating instruction
TA 431
Rev.
8 en
06/2015
Technical modifications reserved!
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21
8.1.4
How to ensure an airless suction
If, due to a falling fluid level in the tank, air may be drawn in
and delivered to a pressurised line or against a pressure keep-
ing valve:
•
install a ventilation valve into the pressure line.
CAUTION!
The delivery may get interrupted if air remains in the
suction line!
Pressure leading
line
Injection fitting
Multi-layer
diaphragm pump
Vent valve
Pressure line
Suction lance /
-line
Foot valve
Tank
Fig. 24 Installation of ventilation valve
8.1.5
Installing the empty-tank alarm
so that the tank is refilled before air is drawn in.
Pressure line
Multi-layer diaphragm pump
Empty-tank alarm
for example solenoid float switch
Suction lance /
-line
Tank
Foot valve
Fig. 25 Installation empty-tank-alarm
CAUTION!
The delivery may get interrupted if air remains in the
suction line!
Содержание 409.2 ML Series
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