The 70C Series high performance rubber lined butterfly valve adopts the central line cavity rubber lined structure. The body and disc are lined with synthetic rubber or the body is lined with rubber, and the disc is made of high quality alloy steel, so as to effectively avoid the corrosion of the valve by media. It has good sealing performance. The 70C Series butterfly valve is widely used as an ideal solution to control and shut-off applications of water, air, petroleum, etc.