The Cla-Val Pacific 580P Series Silent Wafer Check Valve has a spring- loaded poppet that allows the valve to close before flow reversal occurs, resulting in a silent, non-slam closure. It is a truly silent check valve. For ease of installation, the valve can be installed in vertical or horizontal positions with flow up or flow down. The short lay length of the valve allows for a space-saving design. Silent Wafer Check Valves are available in sizes 2” to 10”, with either a 125 lb. or 250 lb. pressure class rating.