HIWA BUTTERFLY VALVES Features: 1) DN: DN40-DN1200 2) PN:PN10/PN16 3) Operation methods: handle lever, electric, pneumatic, worm gear. 4) Type: wafer, lug, flanged, grooved& high performance butterfly valves. 5) Material: Body: cast iron, ductile iron, carbon steel , stainless steel. Seat: NBR, EPDM/ Stem: stainless steel 416,316/ Disc: ductile iron, CF8, CF8M 6) Long service life, free passage, low resistance coefficient. 7) Suitable for control of water, seawater, sewage, oil, air, vapor, food, medicine, acids, alkalis, salts, paper making etc.