We are offering dual plate check valve api.Product description dual-plate check valves are bonnetless and mounted between pipe flanges (wafer style).the valve includes two spring loaded half-moon shaped discs that rotate about their shaft. Size: nps 2"40" pressure: class 1501500 material: wcb, lcb, cf8, cf8m, cf3m, wc6, c5, c12 design & manufacture std.: api 594, api 6d, asme b16.34 face to face std.: api 594, api 6d end connection std.: asme b16.5, asme b16.47 test standard: iso5208, api 6d design and manufacture: ansi b16.34, api 6d face to face: api 6d test and inspection: api 6d sungo series dpv check valve has a shorter face-to-face dimension and dual plate design , the end connection options include wafer type, lug type and double-flange type , and are available in size from 2" to 60 " and in pressure ratings from asme class 150 through 1500 . A wide range of body and trim materials are optional on customer' s request. This series of valves are widely used in oil & gas production, petroleum refining, petrochemical , pulp & paper, shipbuilding , and other fluid back flow prevention application.