PLCS Flowstop Bags are designed for Control-Gas conditions, but can be used in traditional "open-hole" operations. The bladder is held inside a synthetic fabric using a thin wall construction that permits mains entry through a smaller tap hole than competitive brands.

• PLCS Flowstop Bags are barrel shaped to increase load on the pipe wall to retain position and increase the surface seal area to minimize gas bypass.
• Bags are clamped to a semi-rigid inflation core to control entry direction and prevent reversal in the main.
• Double end retention prevents bag loss during a sudden deflation.
• Standard sizes are available for all cast iron and steel mains from 2"-48".
• Special sizes are available for PE plastic pipe.
• Bags are rated at 1¼" psi for mains up to 12".
• Available with rigid inflation control tee and rubber entry stopper, or with flexible hose.

In an "open-hole" Double Block and Bleed shutdown, PLCS Flowstop Bags are recommended for use in pairs at each end of the shutdown. It is also possible to combine a PLCS Flowstop Bag with a PLCS Sensor Bag at each end and be able to continuously record the upstream and downstream pressure during the shutdown.

PLCS Gas Bags can also be used in conjunction with ALH System-One tapping equipment to perform Control-Gas shutdowns.

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