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What is no negative pressure? What is the principle? I'm going to write a paper
Non-negative pressure water supply equipment is a new type of water supply pressurization equipment in recent years. The working principle of the equipment is to realize constant pressure water supply through microcomputer control of frequency conversion and speed regulation.

Firstly, the working pressure of water points is set according to the actual situation, and the pressure of municipal pipe network is monitored at all times. When the pressure is lower than the user's required pressure, the microcomputer automatically controls the auxiliary frequency converter to start, adjusts the rotation speed of the water pump to increase until the pressure of the pipe network rises to the user's required pressure, and controls the water pump to run at a constant speed for constant pressure water supply. When the water consumption increases, the rotation speed increases, and when the water consumption decreases, the rotation speed decreases to keep the user's water pressure constant. The lower the tap water pressure, the higher the pump speed; The higher the tap water pressure, the lower the pump speed. When the tap water pressure is not less than the pressure required by the user, the water pump stops running.

The equipment makes full use of the original pressure of running tap water to ensure the constant water supply pressure of users. During the operation of the equipment, the microcomputer constantly monitors the pressure of the municipal pipe network and system, and automatically controls the vacuum suppressor and the steady flow compensator to suppress the generation of negative pressure, which not only makes full use of the pressure of the municipal pipe network, but also does not generate negative pressure, which has no adverse effect on the municipal pipe network and ensures the safety of water use. Non-negative pressure water supply equipment can not only use the original pressure of the water supply network, but also actively use enough water storage to meet the peak water demand, and will not generate suction to the water supply network.

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