What is three percent?

Sanli is one of the first factories to use machines to manufacture valves and process products. It not only improves the sealing performance of valves, but also reduces the strength of valves. The company has developed UPVC, CPVC, pH industrial pipeline system, UPVC transparent pipeline system, PVDF enhanced acid-base industrial pipeline system, intelligent electric valve control system, and obtained NSF certification, ISO international certification system, and participated in the formulation and revision of national industrial standards.