ISOIL SBM 150, Руководство оператора, Страница: 11 / 35

ISOIL IMPIANTI S.p.A. Page 7
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
Water must not flow through the meter.

Meters must be installed in such a way that air or vapour do not enter through the liquid
under measurement. It is always suggested to install an air separator just upstream the
meter.

To avoid hammer shocks which may strongly damages the meter, it is not advisable to
install upstream or downstream the meter any quick closing valves.

It is recommended to install root valves at the inlet and outlet to ease servicing
operations and isolation of the meter
3.2 Start-up precautions

Before proceeding with the start-up make sure that:
- The meter is adequately fixed
- All the connections are tightened
- Air is bled from the pipes

If a calibration mechanism is associated with the meter, before the start-up it must be
filled with lubricating oil

Vent out all the air eventually present in the line

When the meter is operated for the first time, fill it slowly with the operating fluid by
following this procedure:
- Open slowly the upstream isolation meter or fill the meter by gravity
- Open slowly the downstream isolation meter letting the flow rate rise smoothly to
the operating value
CAUTION
Be very careful when starting up the meter: if the air enters the
measuring chamber the rotor can easily reach high rotational
speeds, leading to abnormal wear of the vanes and other
components; this, in turn, will lead the meter to a major failure.