The additional stroke of butterfly valve shall be at least equal to 50% of the rated static deflection; The number of butterfly valve coils shall not be too small, generally not less than six; The butterfly valve manufactured in this way can ensure that the horizontal rigidity of the electric butterfly valve is enough so that the equipment is stable and not prone to toppling, the elasticity is durable, and the valve capacity is durable. However, the price of the electric butterfly valve of this kind of butterfly valve is often higher. It needs to be pointed out that at present, an electric butterfly valve of butterfly valve is popular in the market, which hides the butterfly valve inside the shell, The reason why the state of the butterfly valve cannot be seen directly outside is that it is incorrect. After using this type of valve for a period of time, if the butterfly valve is seriously rusted, the manager cannot detect and replace it in time, which may lead to the terrible consequences of butterfly valve breaking, water pump sinking, and pipeline breaking