Flomatic has announced the expansion of their American Iron and Steel (AIS) complaint Model 80DIVFD submersible pump check valve in a new 10-inch size. The company’s new, special-patented submersible pump check valve is now available in an extended size range from 1 inch to 10 inches for use with variable-frequency drive (VFD) control submersible pumps or conventional systems. The unique Model 80DIVFD valve is designed to minimize flow losses and hydraulic shocks in the submersible pumping system. It features a standard epoxy coated (ANSI/NSF 61 approved powder) ductile iron body to support deep set pumps. An exclusive patented stainless-steel guided poppet system ensures that the valve automatically adjusts noiselessly from high to very low flow rates.