The electric ball valve system must have a clear vertical division of the system. There are many high-rise buildings in the city, so the electric ball valve system for water supply must have a clear vertical division of the system. The purpose of vertical zoning is to: (1) avoid damage caused by excessive vibration and pressure on the electric ball valve of the water supply system pipeline at the lower floor of the building;
(2) It is necessary to avoid running water noise and water hammer noise caused by too high pressure in the lower floor of the building and too high flow rate in the electric ball valve of the pipeline; (3) Attention shall be paid to avoid water splashing and overflow caused by excessive outflow head of the tap in the lower water supply system. There are many methods and modes for vertical zoning of water supply system in high-rise buildings. (1) First, direct water supply in low areas; The water supply mode of double suction pump with water storage tank, double suction pump and pump box in the high area has the advantage that the pressure of urban distribution pipe can be fully utilized, and the capacity of water storage tank and pump box can be reduced, so the water supply is safe and economical. The disadvantage is that the water storage tank, double suction pump and pump box are set in the high area with large one-time investment and complicated installation and maintenance. (2) Then, a water storage tank, a double suction pump and a water pump tank shall be set to supply water in parallel. Double suction pumps and pump boxes are used for water supply in all areas. The double suction pumps in all areas are centrally located in the basement or the ground floor of the corridor or the outdoor double suction pump room to supply water to each area. The advantage of this water supply mode is that the water supply system of each district operates independently without interference with each other, and the failure of any district will not affect the water use of other districts. Double suction pumps are arranged in a centralized manner, which is convenient for maintenance and management. The water output of the double suction pump and the regulating capacity of the pump tank are both small, which can save operating costs. The disadvantage is that the high area water supply needs to be equipped with a long high-pressure resistant pipeline, and water pump boxes are set in different zones, which will take up more room area, and double suction pumps have many models and large investment.