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Flomatic Corp. introduced its new Model 80DICL-VFD, a special patent-pending submersible pump check valve for use with VFD control submersible pumps. According to the company, standard check valves will “chatter” and be noisy when a VFD goes to low flow, causing premature wear and eventual failure. These valves are designed to minimize flow losses and hydraulic shocks in the pumping system. It features a standard epoxy coating (NSF® approved powder) ductile iron body that incorporates North American Specialty Products patented groove lock type pipe connections called Certa-Lok® to support deep set pumps. An exclusive stainless steel guided poppet system ensures that the valve automatically adjusts noiselessly from high to very low flow rates. Company officials said the radiuses of the valve seat allow a self-cleaning “one point swiping action” by the radius-edged custom molded rubber seal disc. All internal parts are made from corrosion-resistant material.