| | Plastic Flap Check Valve Dwyer Instruments, Inc., Michigan City, IN 18 Mar 2008 The NEW Series FPV Plastic Flap Check Valves from Dwyer Instruments are ideal where backflow could potentially cause damage to pumps, filters, or process equipment. These check valves have been designed to provide excellent flow characteristics, and because of their straight-through flow design they have a lower pressure drop than other check valve designs. In addition, due to their all plastic construction, these valves will never jam or stick as a result of rust or corrosion. | |