Flomatic Corporation introduces a special, patent-pending submersible pump check valve for use with variable-frequency drive (VFD) control submersible pumps. The Model 80DI VFD valve is designed to minimize flow losses and hydraulic shocks in the pumping system. It features a standard epoxy coating (NSF®-approved powder), ductile iron body to support deep-set pumps. An exclusive stainless steel guided poppet system ensures that 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.www.flomatic.com