In 1997 Zhejiang Guanyu seal Co., Ltd was founded, with years of development now are able to manufacture 18 million mechanical seals especially for centrifugal pumps.

In 2009, our silicon carbide branch was established, until now, we are capable to manufacture 6 millions pieces of silicon carbide including Reaction Bonded Silicon Carbide, Sintered Silicon Carbide, Sintered Silicon Carbide+Pores, Sintered Silicon Carbide+Graphite for mechanical seal rings, bushings, bearings, and pump shafts.