With its disc-shaped valve disc that revolves around the pivot axis of the valve seat passage, a swing check valve is a type of valve that uses the flow of the medium to automatically
open and close the valve disc, preventing backflow of the medium. Its streamlined internal passage and relatively low flow resistance make it appropriate for large-diameter applications and low flow rates where the flow does not change frequently.

The double disc check valve consists of two semicircular swing discs installed inside the valve body. It opens and closes automatically relying on medium flow force, preventing reverse flow of pipeline medium. Featuring compact structure, short overall length, light weight and low flow resistance, the valve is suitable for installation in limited space. It can be applied in petroleum, chemical, natural gas, power and water treatment industries.