Tecfluid SC-250 - Manual (Page 6)

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HORIZONTAL FLOW DIRECTION
Figure 1 Figure 2
If the fluid to be measured is a liquid, it is advisable to install a regulating valve BEFORE the flow
meter (Figure 4).
In GAS measurements it is recommended to install the valve AFTER the flow meter, in this way
the working pressure can be kept the same as the calibration pressure. (Figure 3).
If the outlet after the valve is at atmospheric pressure, the valve should be closed until a back
pressure of at least the float’s pressure drop is obtained.
Valves should always be opened slowly to avoid water hammers
FILTERS
The installation of a filter before the instrument is important, this will avoid possible obstructions
and breakdowns in the measuring system.
The mesh of the filter should be 1,5—2 mm.
In the case of having abundant magnetic particles in suspension, it is necessary to mount a
magnetic filter at the inlet to the instrument to avoid the accumulation of particles in the float’s
magnetic field, with the possibility of immobilising it.
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FALLING FLOW DIRECTION