As one of the leading cast iron dual plate check valves manufacturers and suppliers in China and equipped with a productive factory,Website: , Shanghai Hugo Valve Co.,Ltd is always at your service.Cast iron dual plate check valves Description1. There are two discs for cast iron dual plate check valves which is widely used for city water, industry water, building water, drainage pipe etc.2. As the connection end is wafer type, the length of face to face of cast iron double disc check valves is shorter than other common or flanged check valves, the double disc cast iron swing check valves is more suitable for the installation spaces which has space limitations.3. The disc closing stroke of cast iron dual plate check valves is short and the disc was spring loaded, which reduced the water hammer.4.The seat of cast iron double disc check valve can be PTFE lined to meet customer more requirements,we call it rubber lined wafer check valvesvalves materials of constructionBody Materials: Cast Iron, Ductile IronSeat Materials: Stainless steel + satellite, ductile iron+ PTFE/EPDMDisc Materials: Cast Iron, Ductile IronStem Materials: stainless steelSpring material: Inconel 750, stainless steelBonnet material : Cast Iron, Ductile IronApplicable standard Size Range: 2''~32''(DN50~DN800)Pressure: PN10, PN16,Class 150, JIS 10KStandard : ANSI, DIN, JIS End Connection: waferOperate: Manual