3、 When it comes to the selection of electric control valve, it is necessary to decide whether to purchase electric control valve controller additionally. However, due to the general state, the controller needs to be purchased separately. In most states, a single controller will be used, so you need to purchase a controller. If the electrical control performance cannot meet the requirements of engineering design, it needs to be proposed for modification or re design. Of course, the electric control valve should not only pay attention to the pipeline parameters, but also pay attention to the environmental conditions of obligations, because the electric device of this type of control valve is electromechanical equipment, and the obligation state will be greatly affected by the environment of obligations. 　　　　

Since the electric three-way ball valve has different types of designs, it is for everyone to buy according to their needs. The price will be more expensive due to more natural functions. For large buildings or construction content, it is also necessary to consider the cost and profit. Therefore, if you decide that the design is not needed, you should not buy the design with too many functions, otherwise it is a waste.