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Once prepared, the seal is fitted to a small, lightweight, low friction, flow-through and low cost installation packer that is easy to use and has no moving parts or electrical requirements. The packer design is available as a ‘short’ or ‘long’ lateral arm version depending on the length of installation required into the lateral connection. The integrated flow function means that installations can be performed without the need to fully seal off the main pipe flows.
With the seal fitted, the loaded packer is pushed (or pulled, depending on access requirements) into position along the cleaned mainline pipe to the lateral to be sealed. The seal is placed into the lateral during this positioning operation. Once in place the packer is inflated with compressed air pushing the impregnated seal against the inner walls of both the mainline pipe and the lateral. While cure time is just 20 minutes, to ensure that local ambient conditions are taken fully into account it is good practice to hold the packer inflated for 30 minutes which ensures a robust seal is achieved before the packer is deflated and removed from the main pipe.
The installation process ensures that, as the packer is inflated and the sock pushed against the host pipe walls, three-dimensional expansion of the seal into position is achieved.