... API,ABS,WATERMAR obtained; History:17 years (Since1994 triple offset butterfly valve wafer or flange type Size: 2"~80";Pressure rating: ... Products: We 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, ...