Flap Barrier

Flap Barrier is the automatic gates you will find on the stations, office entrances, airports, and also in other many places. It is a device for emergency control. This allows an automatic opening of its two wings while people connect with it with the access cards and close down in a minute after that. Flap gates have a built-in taper. With a small differential pressure on the back of the gate, it opens automatically to allow discharge. When the head is greater on the face side of the gate, the flap closes automatically to prevent back flow. Flaps are a high lift device consisting of a hinged panel or panels mounted on the trailing edge of the wing. When extended, they increase the camber and, in most cases, the chord and surface area of the wing resulting in an increase of both lift and drag and a reduction of the stall speed.