The details are as follows: the tools involved are described in detail. The cleaning tools required for the electric butterfly valve: a dobby ultrasonic cleaner, the electric butterfly valve to be cleaned, water and cleaning fluid. 　　

The sealing structure of metal floating valve seat is difficult to seal between the floating valve seat and the valve body. The combined ball strut type sealing structure, because of many parts and disordered structure, increases the processing difficulty and production cost, especially for the small diameter hard seal ball valve, this structure is obviously not applicable. After repeated analysis and testing, and with the aid of CAD auxiliary design, the Q47H cam biased single seat fixed hard seal ball valve was successfully developed.