Definition - What does Flexible Packer mean?
A flexible packer is a pipe repair/rehabilitation tool that is used to remotely repair damaged pipes. The packer itself is an inflatable hollow rubber tube with wheels on either side. A resin-saturated fiberglass mat is wrapped around the packer, which is then rolled into the host pipe and inflated to repair the spot in question.
Trenchlesspedia explains Flexible Packer
Before the flexible packer is deployed, the pipe is inspected beforehand using a CCTV camera system to determine the exact location of the defect. Once the spot to be repaired is found, the flexible packer with the resin-soaked repair mat is wheeled into place using push rods or rope.
Once at the desired location, the packer is inflated using compressed air until the resin-soaked fiberglass mat presses against the inner walls of the host pipe causing the excess resin to penetrate into the damaged areas. The pressure is kept until the resin-soaked mat has cured and formed a tight bond with the host pipe. The packer is then deflated and removed from the pipe.