What is superimposed water supply:No negative pressure frequency conversion water supply equipment based on the launch of a new generation of water supply equipment, in the following products under the premise of the national standard requirements, summed up their years of experience in production and application of network overlying water supply equipment design, constantly improve, equipment operation more reliable, more advanced performance, more energy saving and environmental protection is negative pressure water supply equipment adopts microcomputer frequency conversion control constant pressure water supply, the negative pressure compensation system to overcome the bad effect of the pipe network, set a pressure value has no negative pressure water supply equipmentTap water pipe network of water into the steady flow tank, tank air from a vacuum eliminator, after being filled with water, vacuum eliminator automatically shut down 1 when the tap water pipe network pressure can meet the water requirement, system directly by the bypass valve to the water pipe network 2 when the tap water pipe network pressure can not meet the requirements of water supply, the system pressure feedback signal by far eastone pressure gauge to the frequency conversion controller, the pump running, and automatically adjust the rotate speed constant pressure water supply according to the size of the water consumption if running water pump to industrial frequency speed, start another 4 pump frequency conversion operationsIf tap water pipe network of water is greater than the water pump flow, the system keep hold water during peak usage 5, if the tap water pipe network of water is less than the pump flow, the steady flow tank water supplement water can still normal water supply, at this point, the air from the vacuum eliminator to steady flow tank, tank vacuum destroyed, ensures that the tap water pipe network does not produce negative pressure, the water after the peak, the system return to normal state when tap water pipe network of water supply water supply, causing steady flow tank liquid level falling, liquid level detector signal feedback to frequency conversion controller, pump automatic stop, in order to protect the pump unitWhen the water supply is small at night and the pressure of the tap water pipe network cannot meet the requirements, the pneumatic tank can store and release energy, thus avoiding the frequent start of the superimposed water supply equipment.1. High-rise buildings, living community and so on life and fire fighting water 2. All kinds of water plants, water supply stations, water supply and drainage of sewage treatment plant, such as 3. Industrial and mining enterprises production and living and fire fighting water 4. Heating air-conditioning ventilation system used in the cold hot water circulation system of water supply system 5. Agricultural irrigation and drainage landscape and water spraying system in both the water supply 6. The original water supply system, such as high pressure water tower tank waterworks water supply improvement 7. All kinds of oil system of oil water conveying 8. Special occasions such as ships, military base of civil air defense facilities such as water supply.