Crane Valves”Duo-Chek II high-performance wafer check valve is designed to solvenon-return valve problems by allowing the same flow-through asan equivalent-sized swing check. The valve is available in classes125-2500 and sizes from two inches to 72 inches. Lug, wafer,double-flanged, retainerless, and extended body styles are available.Raised-face, plain-face, ring-joint, weld-end, and hub-end options arealso available. The valve features resilient seal materials. Materialsof construction include cast iron, ductile iron, WCB cast steel, 316stainless steel, and all alloys.