The bearing disk casing is a part of the casing-type expansion device.

Expander is a new product for pumps, valves, pipelines and other equipment connected to the pipeline, through the all-bolts to connect them to become a whole, and have a certain amount of displacement, easy to install. It can withstand the axial pressure of the pipeline. So that it can be adjusted according to the site installation size during installation and maintenance, when working, not only to improve efficiency, but also to play a certain role in the protection of pumps, valves and other pipeline equipment.