Analysis of the principle of no negative pressure water supply

- Aug 14, 2019-

      No negative pressure frequency conversion water supply equipment is put into use. The water in the water network enters the steady flow tank. The air in the tank is discharged from the vacuum eliminator. When the water is full, the vacuum eliminator automatically turns off.


      When the pressure of the water supply pipe network can meet the water demand, the system directly supplies water to the water supply pipe network through the bypass check valve; when the pressure of the water supply pipe network cannot meet the water demand, the pressure signal of the system is fed back to the frequency conversion control through the remote pressure gauge. The pump runs and automatically adjusts the speed and constant pressure water supply according to the amount of water used. If the running pump reaches the power frequency, it will start another pump to run the frequency converter.


      When the water is supplied by the pump, if the water volume in the water supply network is greater than the pump flow rate, the system maintains normal water supply: when the water consumption peaks, if the water volume in the water supply network is less than the small pump flow rate, the water in the steady flow water tank can still provide normal water. Water as a supplemental source of water. At this point, air enters the stabilizing tank from the vacuum eliminator and the vacuum in the tank is destroyed. It ensures that there is no negative pressure in the water network. After the water consumption peaks, the system will return to normal water supply.


      When the water supply network is shut down, the level of the steady flow tank continues to drop. The level detector feeds the signal back to the variable frequency controller and the pump automatically stops to protect the pump unit. When the nighttime water supply is small and the water supply pipe network pressure is not met, the pressure tank can store and release energy to avoid frequent starting of the pump. Recommended reading: the main way of secondary water supply in high-rise buildings