Low resistance backflow preventer

Low resistance backflow preventer is a device that utilizes the principle of hydraulic control (check valve) and adopts a control method different from pressure reduction *. It can ensure the safety of air partitions and effectively reduce head loss. When the flow velocity V is 2.5m/s, the head loss h is 2-3m; The external dimensions are small and can be installed horizontally or vertically, basically meeting the ideal requirements.