Customers rely upon the trusted and forward-thinking Flexi-Hinge designs for efficiency and performance that comes with the seatless, full-port, double-disc check valves that Flexi-Hinge designs and manufactures in the United States. With the ultimate protection in preventing liquid or gas flow reversal in system pipelines, the proven performance in demanding applications is a hallmark of Flexi-Hinge products. All of these valves are engineered with the largest flow areas worldwide and low-pressure open/close requirements, and, in conjunction with the design that avoids metal-to-metal rotating points, the reliability and durability of Flexi-Hinge check valves can not be beaten.