About Product:Disc valve is also known as the flap valve, is a simple structure of the regulating valve, Can be used for the low pressure pipeline medium switch control butterfly valve refers to the closing part (disc or disc) for the disc, Around the valve shaft rotation to your the opening and closing of a valve. The Valves can be 2 control the flow of various types of fluids to the as air, water, steam, corrosive media, mud, oil, Liquid metal and radioactive media. It mainly plays the role of cutting off and throttling on the pipeline. The butterfly valve opening and closing member is a disc - shaped butterfly plate that rotates Around its own axis in the valve body for opening and closing or adjusting purposes.