PLCS Sensor Bags continuously monitor pressure in the main during shutdown, without the need for an additional tap.
The bladder like the Flowstop Bag is held inside a synthetic fabric permitting mains entry through a significantly
smaller tap hole than any competitive product.
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- Gauges record the internal bag pressure and continuously record the upstream pressure in the main throughout a shutdown operation
- The bags are barrel shaped to increase load on the pipe wall to retain position and at the same time increase the surface seal area to minimize gas bypass
- Sensor Bags are clamped to a semi-rigid inflation core to control entry direction and prevent reversal in the main or bag loss during sudden deflation
- Standard sizes are available for all cast iron and steel mains from 2"-48"
- Special sizes for PE plastic pipe
- Rated at 1¼ psi for mains up to 12"
- Available with rigid inflation control tee and rubber entry stopper
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In an "open-hole" Double Block and Bleed shutdown, Sensor Bags are recommended for use in pairs at each end of the shutdown.
By using 2 Sensor Bags not only is the internal bag pressure recorded, but it is possible to confirm a zero pressure zone
between the bags as well as separately monitor the upstream and downstream mains pressures.
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