A packer is an inflatable device used for the sectional repair of pipes and sewers. The device is inserted into defective pipes and inflated so that sealing material is bonded to the pipe. The use of packers is one method available in the trenchless rehabilitation of underground pipes.
Trenchlesspedia Explains Packer
Packers make use of an internal pipe-sealing technology. The pipe seal may be done robotically or by manually extending the packer into the pipe. Packers can be inserted into confined spaces to repair pipe points that are otherwise difficult to reach.
Designs of packers may differ, but the concept is the same. Packers are generally long and cylindrical so that they can fit into defective pipes. They are used in trenchless rehabilitation for pipe point repair. A sleeve with sealing properties is placed around the packer and then inserted into the pipe. When the packer is in place, it is inflated so that it presses the bonding sleeve against the inside surface of the pipe. Once bonding is complete, the packer is deflated and removed.