Generally, the phenomenon of leakage of the expander is mainly because the sealing part of the expander product, that is, the rubber ring, manufacturers normally use the expander for installation, the corrosion resistance of this rubber ring, aging performance are better, in the normal process of pipeline compensation operation, the general service life of at least 5 years, but some users in the purchase of products, normal installation and use Less than half a year, the above problem, in general, is some unscrupulous manufacturers, the use of recycled rubber as a rubber seal manufacturing materials, recycled rubber tension wear resistance performance in all aspects is not as good as natural rubber, so in the application will cause a leak caused by the rubber sealing structure, such a situation, you can replace the special rubber seal material, replacement can Meet the needs of the user's use. It can be seen that the purchase of products is not only to listen to the price, greedy for cheap, good quality is the hard truth.
