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Butterfly valve suitable medium :water,sea water,sewage, gas , petroleum/chemical medium,ect.
Product standard: BS,AWWA,DIN or equivalent.
The rubber sealing ring is put on to body of the valve. The sealing ring is wider and more elastic, disk sealing ring is made of stainless steel and put onto the disk by heating therefore it is firm after cold, which reduce friction and improve performance and service life.
Manual Butterfly Valve