The central centralized water supply system, in short, is a system that integrates water into a centralized platform and provides water by quality in combination with the water use standards of different floors. Through independent pipelines, water with different water quality can be transported to the corresponding floors, and can be taken at any time, which is convenient and hygienic. The water supply system is embodied in the overall building as the machine room of the central quality water supply system, the circulating water supply network management, and the water points of different departments or parts.

Ultrapure water machine ultrapure water machine is roughly divided into four units: pretreatment, reverse osmosis, ultra purification and terminal ultrafiltration. Tap water first passes through the pretreatment unit to remove large particles, suspended solids and some organic matter in the water.

Ultrapure water produced by laboratory ultrapure water device is water with low content of ions, organic matter, particles, soluble gases and other pollutants. It is widely used in analytical instruments, cell culture, molecular biology, electrochemistry and other fields. Ultra pure water has very strong solubility due to its ultra-high purity. Practice has proved that the water quality of ultra pure water above 15 m Ω· cm will drop to about 4 m Ω· cm after exposure to air for 1 hour.

As a common laboratory equipment for physical and chemical analysis, biological monitoring and pharmaceutical processing, laboratory water purifier is favored by various industries. In order to reduce the frequency of failure of laboratory water purifier and prolong its service life, regular maintenance is indispensable.

In the process of using the laboratory water purifier, effectively avoiding scaling can ensure the quality of pure water. How to prevent scaling mainly depends on the pretreatment of raw water, and pay special attention to the qualification of pollution index, that is, the substances easy to scale in raw water, such as calcium and magnesium ions, are removed in advance through the front system of reverse osmosis membrane. Secondly, bacteria should be well controlled to avoid the breeding of bacteria in the ultrapure water machine, maintain the turbulent state on the brine side, reduce the concentration polarization of the solution on the membrane surface, and avoid the precipitation of some insoluble salts on the membrane surface, resulting in scaling.

Laboratory water purifier is an important equipment for experimental research, which provides the required analysis and test water, reagent water, experimental water and analytical instrument water for the laboratory.