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User Manual v2.0
MAG
A minimum slope in an ascending flow of 1 : 500 or higher is recommended in order to stimulate the
entrapped air pocket to move away from the meter.
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 off.
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. 52 | Flowmeter with slight ascending slope with air vent at the top
Fig. 53
Drawings are made with an exaggerated
slope for greater clarity
