The development history of non-negative pressure water supply equipment

The development history of non-negative pressure water supply equipment The non-negative pressure water supply equipment is a pressurized water supply unit directly connected to the municipal water supply pipe network, and the non-negative pressure water supply equipment is connected in series on the basis of the residual pressure of the municipal pipe network to ensure the municipal pipe network. The secondary pressurized water supply equipment whose pressure is not less than the set protection pressure (it can be 0 pressure of the relative pressure, and it is called negative pressure when the pressure is less than 0). The core of the pipe network superimposed (no negative pressure) water supply equipment is how to prevent negative pressure during the operation of the secondary pressurized water supply system, eliminate the impact of unit operation on the municipal pipe network, and ensure that it does not affect the water use of nearby users Realize safe, reliable, stable and continuous water supply. Non-negative pressure water supply equipment is also called pipe network superimposed water supply equipment. At present, there are mainly tank-type non-negative pressure water supply equipment and box-type non-negative pressure water supply equipment on the market. Development history Overlapping water supply technology was first developed in Japan. In the mid-1980s, Japan had already begun research on this aspect. The research content is not limited to the technical level, but also market demand, administrative management and law, and urban senior management. Discussions on the building's water supply mode and other levels have also started. The direct water supply system was listed in the national policy document 'Long-term goal of water supply system transformation and reconstruction for the 21st century' by the Japanese Ministry of Health, Welfare and Welfare. The water supply design specification was revised accordingly, and the service water pressure at the end of the water supply network was revised. From the original 0.15Mpa to 0.2MPa, the state provided corresponding funds to build a laboratory of a certain scale in Chiba Prefecture, and organized a group of scientific research institutions, water supply companies, scholars and product manufacturers. After the funds were prepared, research on 'direct water supply' was carried out. It is planned to complete the research on 'promotion of direct water supply system' in 3 years, and many corresponding researches have been done. Japan's Sapporo City Waterworks Bureau began to implement a new secondary water supply plan in 1992. In that year alone, 68 buildings used superimposed water supply equipment for water supply, and their original water tanks were cancelled. The effect of the renovation was quite good. DAREYET Water Group, a professional water company in the United States, has been committed to the development and research of new secondary water supply technologies and has successfully promoted the use of stacked water supply equipment in the United States and around the world. By the end of the 1990s, pipe network superimposed water supply technology has been widely used in Japan, the United States, Western Europe and other countries. Water pump factory, water water pump factoryu003c/pu003e
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