Flomatic Corporation introduces the Model 80S6CL-VFD, special patent-pending submersible pump check valve for use with variable-frequency drive (VFD) control submersible pumps. The valve is designed to minimize flow losses and hydraulic shocks in the pumping system. It features a 316-SS body that incorporates North American Specialty Products patented Certa-Lok® groove-lock-type pipe connections to support deep-set pumps. An exclusive stainless steel-guided poppet system ensures the valve automatically adjusts noiselessly from high to very low flowrates. All internal parts are made from corrosion-resistant materials and have a high-strength durable design. http://www.flomatic.com, (800) 833-2040, [email protected]