M10
Instruction Manual
26
Fig. 34 Flowmeter with slight ascending slope with air vent at the top
A second solution is to mount the flowmeter vertically with an upward flow stream, which ensures that
the air always moves quickly past the meter.
Importance of air vent valves.
The general principle of each installation is to ensure that the device is always full of water; however, this
is not always possible since a part of the network could drain when the pumps are turned o.
It is, therefore, essential to ensure that the design incorporates a properly designed and sized air vent
valve to release the air when the pump starts, making sure that the meter immediately starts reading.
Fig. 35
500
1
α = 0,15°
Drawings are made with an
exaggerated slope for clarity
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