Ultra-clean workbench working principle and purchase guide The ultra-clean workbench is a kind of laminar flow local air purification equipment. It adopts an adjustable air volume fan system. After adjusting the fan workbench , the wind speed of the clean working area can be kept within the ideal range. (The pressure gauge can be equipped according to customer requirements, and the change of high-efficiency filter resistance can be grasped at any time . Air Filled Flood Tube,Air Inflated Flood Tube,Air Filled Water Gate,Tube Water Barrier Denilco Environmental technology(Suzhou)Co., Ltd. , https://www.wflood.com
The working principle of the ultra-clean workbench is that the fan draws in air from the environment, first passes through a foam-like patio cotton called “primary filterâ€, which filters out the large particles of dust in the air; A HEPA filter called a " high efficiency filter " filters out the remaining small particles of dust larger than 0.3 microns. Through the two-layer filtration, the air entering the working area of ​​the ultra-clean cavity reaches the dust-free standard of 100. Since the microorganisms such as bacteria can only adhere to the dust in the air, the ultra-clean platform achieves dust-free performance. Sterile.
The use of ultra-clean benches is in the fields of biochemical laboratories, bio-pharmaceuticals, optoelectronics, and microelectronics. The types of ultra-clean stations are divided into vertical flow super clean benches and horizontal flow ultra clean benches. The so-called vertical flow means that the filtered clean air is blown from the top to the bottom of the clean bench, and then the clean bench is blown forward and backward. The vertical flow clean bench is usually used in experiments in the biomedical industry; It means that the filtered clean air is blown directly from the back to the operator, and the horizontal clean bench is usually used in the electronics industry and planting.
For the purchase of ultra-clean workbench , * first confirm the ultra-clean platform for vertical flow or the ultra-clean platform for horizontal flow, and then determine the number of users and the number of uses of the ultra-clean platform, whether it is single-sided or single-sided Single double-sided, or double single or double double. After determining the above two points, the selection of the clean platform is basically over.
There may be many users who will question why the structure of the clean bench is * a shell fan and a two-layer filter, but the price difference is so large. * Let us analyze the material under a clean bench, * before * the appearance of making some of the more sophisticated new clean bench, stainless steel material used is better, so the shell will have a higher cost; secondly fan clean Bench is also a distinction between the price of a component *, good clean bench is usually imported fan, such a small fan noise, low vibration, allows the operator to carry out experiments in a quiet environment *, and * some domestic The fan will find a lot of noise after using the * period of time, and the vibration of the ultra-clean table will also affect the normal operation of the experiment; the latter is also important for the high-efficiency filter (HEPA film), which is directly affected by the high-efficiency filter. The cleanliness and service life of the clean bench , so the quality of the HEPA film will be much higher in cost than the lower grade film. Of course, the length of life of the HEPA membrane is related to the cleanliness of the air. In the temperate zone, the ultra-clean platform can be used in the general laboratory. However, in the tropical or subtropical region, due to the high level of pollen or dusty areas in the atmosphere, the ultra-clean platform should be placed in a good double-door. Indoor use. Under no circumstances should the inlet hood of the clean bench be facing the open door or window to avoid affecting the service life of the air filter.
For the life of the HEPA membrane, usually about three to four years, when the HEPA membrane can no longer provide efficient filtration, replace the * new high-efficiency membrane. The method of testing whether the HEPA film is replaced or not can be determined by using a dust particle counter to determine whether the air in the clean bench is still 100 cleanliness or using a plate agar to measure the settler. It should also be noted that the use of ozone-generating UV germicidal lamps also reduces the useful life of the HEPA membrane.
* Some users will be confused about the scope of use of clean benches, biosafety cabinets and fume hoods when purchasing clean equipment . The ultra-clean bench is used for aseptic and dust-free experimental operation to protect the sample in the table, but it is not protected by the operator in front of the stage, so it is impossible to carry out the operation of some harmful microorganisms; and the biological safety cabinet can protect at the same time. The sample and the operator in front of the stage; the fume hood is the suction device, and the wind is sucked into the table from the operator, so the fume hood protects the operator but does not protect the sample. After you have figured this out, I believe that you will have a clearer understanding of the purchase of the ultra-clean platform .