The Check-All Flanged & Drilled check valve is a one-piece cast body valve with ANSI/ASME B16.5 Class 150 flanged ends. The HVFD series valve is used when higher flow rates and lower pressure drops are required. The valve is available in sizes 1 through 10 inches and standard materials of 316 stainless steel, brass and carbon steel. The HVFD series valve is designed for use with mating ANSI class 150 flanges.