... 93 EC 4)Established in 1987 Double flange butterfly valveSizeRange:DN25~DN3500 Class Range:150LB-900LB Structure:butterfly valveelectric double flanged ... can produce gate, globe, check, ball and butterfly valves with the materials of ductile iron, carbon steel, alloy steel, stainless ... to order. Our products are designed and manufactured in accordance with the standards of GB, ASME, ANSI, API, BS, DIN ...