Butterfly ValvesSEALMEACH Wafer Type, Slim-Seal, Center Disc Butterfly Valves are reliable, maintenance free shutoff with permanently gas-tight seal with an integrally moulded or replaceable elastomer body liner. SEALMECH butterfly valves are available with double gland sealing with P.T.F.E. Bearing Bush. These butterfly valves excess other conventional valves such as gate valve and globe valves in all aspects, especially in terms of light weight, less number of component, no flange gaskets required and economical operation and maintenance costs.