... .Stem: SS (One Piece with Pin) 5.Seat: NBR EPDM Double Flange Butterfly Valve (Center Line) 1.Size: DN50 to DN12002.Body ... PTFE6.Working Pressure: PN107.Surface: Electric Fussion Epoxy Powder Coated 8.Actuator: Hand Lever Worm Gear Penumatic Electric 9.Flange drilling standard ... , air, vapor, food, medicine, acids, alkalis, salts, paper making etc. Double Flange Butterfly Valve