Brodie BiRotor Plus B27X - Removal of the Measuring Unit from the Process Line; Removal of the Measuring Unit from the Instrument Body

IOM BiRotor Plus R27Page 23/58
9.3 - Removal of the Measuring Unit from the Process Line
1. Disconnect all power to the instrument.
2. Relieve all system pressure and drain the
meter.
3. Disconnect all external wiring from the
electronics unit.
4. Unbolt the instrument from the process
piping and remove to a workshop for further
disassembly.
NOTE:
Care should be exercised to prevent the intrusion
of foreign material into the instrument end
connections.
9.4 - Removal of the Measuring Unit from the Instrument Body (B27 thru B32)
1. Turn the meter on end so that it stands on
its inlet flange, this will also facilitate in fully
draining the instrument of process fluid.
2. Remove fasteners and lift off the outlet
housing.
3. Remove housing O-ring.
4. Holding the measuring unit assembly by the
ribs, carefully lift straight up until the assembly
clears the inlet housing.
5. Place the measuring unit in the horizontal
position.
At this stage the assembly can be inspected for
wear or damage. If the assembly had jammed it
may be possible to unblock the rotors by flushing
it with a cleaning solvent or kerosene without the
need for further disassembly.
Further disassembly of the measuring unit for
cleaning or inspection can be achieved while
maintaining clearance settings. This procedure is
covered in the next section. To fully disassemble
the measuring unit proceed to Section 9.6.