Duct rubber compensator is divided into FDZ, FVB, FUB, XB four kinds of models, from rubber and rubber fabric composite material, steel flange, socket, thermal insulation materials, mainly used for a variety of flexible connection between fan, air duct, its function is sealing, shock absorption, noise reduction, medium resistance, displacement and makes the pipes easier to install, is an extremely ideal environmental protection field shock absorption, noise reduction, the best accessories and smoke prevention and dust control.