Features:1.suitable to be used for frequently opration, quickly and close and portability:
　　　　 2.Less flowing resistance;
　　　　 3.Simple structure, small volume, light weight and easy to maintain;
　　　　 4:Excellent seal performance;
　　　　 5:No shaking, less noise and long life。
Application: To be fitted to PE and PVC pipe and cast iron pipe for the fresh water supply.