B-149-4N-E
16
10. DISASSEMBLY AND INSPECTION
Although it depends on individual operating conditions, periodic disassembly and inspection should be
performed at least once a year.
CAUTION: Because Smart Ultra OVAL is a precision industrial instrument,
disassembly and inspection should be performed indoors as a rule. If it is
desired to disassemble and inspect it as installed in the field, an important
precaution to remember is to reduce the internal pressure of the piping
assembly to a safe level, shut off valves upstream and downstream of
the meter fully, drain the piping assembly and then place a suitable fluid
receptacle directly below the Smart Ultra OVAL. Exercise care to keep
individual components disassembled free from grit and dust.
CAUTION: Be sure to deenergize before you disassemble.
◆
Meter Body Inspection
◆
Complaint and possible cause: Process fluid will not run. Jammed with scales, the oval rotors fail
to rotate, resulting in an interrupted fluid flow.
10.1 Size 50 Meter Body Disassembly and Inspection
METER BODY
HEX SOCKET
HEAD BOLTS
FRONT COVER
O-RING
HEX SOCKET
HEAD BOLTS
(2) With the front cover (register) removed, the
measuring chamber with oval rotors and other
components are now accessible.
(1) Take off all six front cover tting bolts (104) (M6),
using wrench.
With the bolts removed, the register integral with
the front cover is ready to be separated from the
meter body.
Be careful not to drop the register front cover
assembly.
ROTOR SHAFTS
ROTORS
MEASURING
CHAMBER
(3) Remove oval rotors (201) from the measuring
chamber and inspect them for condition.
(a) Inspect the oval rotors to see if they are jammed
with foreign solids.
(b) Check the rotors, shafts and other members for
wear.
(c) Inspect the measuring chamber and the inner
wall of front cover for damage or any other sign
of unusual condition.
Upon completion of these inspections, clean the
oval rotors, rotor shafts, measuring chamber and
front cover with clean water or suitable solvent
thoroughly.
CAUTION
1. Score marks, scratches, high spots due
to impressions, or other flaws should
be reconditioned flat with oil stone or
other tool.
2. If the areas which have been in contact
with rear cover jack bolts are distorted
outwardly, recondition it flat with oil
stone.
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