The American standard ANSI Class600 swing check valve is made of carbon steel or stainless steel. Its function is to prevent the backflow of the medium in the pipeline. The opening and closing components open or close by the flow and force of the medium.
Flange type 600 level swing check valve 
12 inch carbon steel 600 # swing check valve, 600 grade flange swing check valve, swing check valve is installed with a disc that swings on a hinge or shaft The valve disc swings from the valve seat to allow forward flow, and when the flow stops, the valve disc swings back onto the valve seat to prevent reverse flow.
