1. Allowable value of valve stem diameter When selecting electric equipment, pay attention to the allowable valve stem diameter, and the valve stem diameter must be less than this value. In addition, the requirements for the height of the valve stem cover (related to the valve diameter) should also be put forward when selecting multi reversing electric equipment. Rotary stem valves may not be equipped with valve stem covers. 　　

First, only a simple valve core is needed to control the butterfly valve with intelligent software to realize the valve core and valve seat with complex curved surface shape. In other words, with the help of intelligent software, it can replace the complex processing steps of the traditional regulating valve core and valve seat. Therefore, compared with the traditional control valve, the production cost of the intelligent electric switch butterfly valve is lower, and the production process is simpler and more durable.