Precautions for the use of laboratory ultrapure water machine:
1, precision cartridge: precision cartridge, also known as the filtration cartridge, wire-wound cartridge and PP meltblown cartridge, the main filtration of sediment in the raw water, such as large particles, and its filtration precision of 5 micron, 1 micron and so on. The new cartridge is white, if the time is long the surface will be silt and sand, brown, which means that the cartridge can not be used, with tap water to rinse off the surface of the silt, you can barely continue to use 1-2 weeks, but can not be used for a long time. Filter element placed inside the filter bottle, some filter bottles are transparent, you can visually observe the color change of the filter element, some filter bottles are opaque, you need to unscrew it in order to observe the changes in the filter element. From empirical data statistics, precision cartridge life is generally in 3-6 months, such as raw water sediment, its life is shorter, less sediment and other particles, the life is a little longer.
2. Purification column: purification column according to the customer's water quality needs are sometimes called ultra-purification column, since the role of reverse osmosis purified water depth desalination, and ultimately reach a level of water or ultrapure water. The principle is ion exchange. The life of the purification column is represented by the resistivity online. Below a particular resistance means that the purification column is expired, which is more intuitive. Its life is mainly affected by the customer's water consumption
3. Activated carbon cartridge: activated carbon cartridge is mainly through the adsorption effect, to remove the odor, organic matter in the water. Tap water has residual chlorine, reverse osmosis membrane has a great oxidizing effect, so it must be removed by activated carbon. Activated carbon cartridge from the surface to see no intuitive changes, according to experience, generally in about a year to reach saturation adsorption, need to be replaced.
4. Reverse osmosis membrane: reverse osmosis membrane is a very important part of the ultra-pure water machine, its pore size is very small, so in the process of using the bacteria and other microscopic substances are often silted up on the surface, generally various manufacturers of water purifiers have a backwash function, designed to wash away contaminants. Water consumption within 10 liters / day, you can rinse 3-5 times, more than 10 liters, then rinse a few more times. If it is not used for a long time (e.g., more than 1 month), it needs to be removed and soaked in a disinfectant solution to avoid bacterial growth, but the process is cumbersome, and it is recommended that even if the water is not used, it is often switched on with a small amount of water to allow circulation to be formed inside the machine and to minimize the deposition of stagnant water for an excessive period of time. The life of the reverse osmosis membrane in 2-3 years, mainly by the customer's water consumption to determine, so the user must choose the matching specifications in the purchase.
5. Water: tap water as a source of ultra-pure water machine generally have two outlets, respectively, three water and a water, the reverse osmosis out of the water is the three water, stored in the tank, while the first water is ready to take, not stored. Three-stage water did not pass the purification column, one-stage water passed the purification column, one-stage water cost is higher than three-stage water. So customers in the daily application, should be based on the water quality needs of water quality, can use three water when try not to use a water, to avoid the use of rising costs.
Overall, China's southern city tap water quality is better than the northern water quality; the Yangtze River Basin city tap water quality is better than the Yellow River Basin water quality; river water as a source of tap water is better than groundwater as a source of tap water quality. General laboratory ultrapure water machine manufacturers product design parameters (flow rate, water quality, life of consumables, etc.) are based on better quality of tap water as a basis for calculation, if the user's tap water quality is poorer, in the selection of both water quality and water production are advisable to increase the value of the first level of selection indicators. Especially the water production, it is best to double the selection to prevent frequent replacement of consumables, and consumables consumed too quickly due to the decline in water quality.
In addition, the customer water quality is poor, the need to affirm to the ultrapure water machine manufacturers, manufacturers of technical personnel can be based on the customer's specific water quality, the customer selected to enhance the pretreatment (multi-media filters, softening devices, etc.) in order to improve the quality of water supply, to extend the service life of the consumables.