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Pig Signallers

Pig Signallers allow the operators to confirm the passage of a pig in the pipeline. For these "intrusive" type of pig signallers, a mechanical trigger will be potruding into the pipe internals.

When a pig passes the signaller, the trigger will be activated and a indicator flag will be raised (i.e. visual signal).


More Information

A proximity switch can also be installed on the pig signaller, that can send a signal to the Control Room, which can be used as inputs for other actuated valves along the pipeline.

THS supplies pig signallers in three main configurations;

  1. Boss mounted (non-removable)
  2. Flange mounted (non-removable under pressure, removable when isolated)
  3. Flange mounted with isolation valve (removable, even under line pressure)

These signallers comes in various configurations, i.e.

  • ANSI Class 150lbs, 300lbs, 600lbs, 900lbs, 1500lbs, 2500lbs
  • Body material in Carbon Steel, High Temperature Steel, Stainless Steel, Duplex


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