ISOIL SBM 150, Руководство оператора, Страница: 12 / 35

Page 8 ISOIL IMPIANTI S.p.A.
MA/027/00/EN/07 All rights reserved. Reproduction of this manual is forbidden.
CAUTION
All parts under pressure must be released before disassembling the
meter or its accessories for adjustment, inspection, servicing or
substitution of its components.
Also make sure that all electric or electronic part, if present, are
disconnected from its power supply.
4 Maintenance
Before removing the flow meter from the pipeline for repairs, it is recommended that the
possible causes and corrective actions are noted with the help of Fault Diagnosis Chart given
in this manual.
Note that certain components in the flow meter assembly are not interchangeable. Therefore,
if more that one flow meter is dismantled, it is recommended that each flow meter is
dismantled independently.
CAUTION: Be very careful when you start up the meter after maintenance: 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. See chap.3.2 for start-up procedures.
4.1 Disassembly
The SBM150 flow meter may be considered as two main assemblies: the measuring
chamber and the calibrating mechanism. To separate these two assemblies from each other,
remove the screws securing the calibrating mechanism on the flow meter body.
CAUTION: Before dismantling the meter for maintenance release pressure from the line and
drain all the fluid inside the meter through the draining hole below the meter.
Proceed then with the maintenance of the faulty part.
4.1.1 Main components disassembling

To ensure stability during the dismounting, it is advisable to use our "Ring Support tool"
(see special tool).

Remove the sealings and the screws of the counter, unscrew the screws fixing the
calibrating mechanism and after the removal of the transmission spindle, take off the
transmission spindle pin.

Remove all nuts, bolts and washers of the front cover.

Remove the front cover using the "Cover Removal Tool" (see special tool).

Remove the rotor group by using the "Rotor removal and turning tool" (see special tool).
Turn the rotor so that two graphite vanes re-enter in the rotor in correspondence of the
smaller radius.