... Website:http://www.hugo-valve.com, butterfly valve wafer type with lock lever, centerline lug butterfly valve, full lug butterfly ... 3, high precision for disc, being shot blasted, cooperate with seat closely, which makes good sealing, there is no leakage between ... Materials: Cast Iron, Ductile Iron, WCB , Stainless Steel, Bronze Seat Materials: NBR, EPDM,PTFE, VITON Disc Materials: Ductile Iron, WCB ...