The CDG ball valve is widely used in petroleum refining, long pipeline, chemical industry, paper making, pharmacy, water conservancy, electric power, municipal, steel and other fields, especially in oil, natural gas, national reserve depot and refining cracking unit on a wide range of applications.Its strength, safety and environmental resistance are specially considered in the design, which is applicable to all kinds of corrosive and non-corrosive media.Different materials can be used for conveying water, steam, oil, natural gas, nitric acid, acetic acid, oxidizing medium, urea, etc.The ball valve has compact structure and reliable sealing. The sealing surface and spherical surface are often closed, which is not easy to be eroded by the media and easy to operate and maintain.