China zhengzhou mason is china's largest company of flexiblerubber bellow company , our products are sold around the world. Our main products include flexiblerubber bellow, dismantling joints, steel expansion joints. Flexible rubber bellow are made of nbr rubber, ptfe rubber, epdm. The flange of rubber expansion joints can be made jis flange, din flange, ansi flange and bs4504 flange. Variety of materials rubber were applied to different media. Different materials of flanges are applicable to different working environment. Please choose according to their specific working environment.
