TDW PIG-SIG V, Operating And Maintenance Instructions Manual

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65
Section VII – Maintenance
Table 11. PIG-SIG V Maintenance Intervals
Item Interval
Seal
Inspect every six months for tears or cracks.
Replace annually (order seal kit).
Magnet
Inspect annually. Replace if cracks or chips are
present.
Indicator O-ring Replace annually.
Plug O-ring Inspect any time plug is removed. Replace annually.
Plug Backup
Ring
Replace each time the plug is removed.
NOTE:
These time frames are suggestions from TDW. Times may vary depending on
the pipeline product and the environment that the unit is exposed to.
Electrical
or Combo
(Cont.)
Flag does not
raise after
assumed pig
passage/switch
does not
actuate or
release (reset).
Proper switch adjustment: refer to
electrical switch instruction in the manual
and ensure the switch is adjusted
properly. Gap between polymer slider
and switch plunger should be between
0.005 and 0.02 inches (0.1 to 0.6 mm).