Guide There are various types of ultra-clean workbench in the Chinese market. According to the operation mode, it can be divided into five different types, and there are different divisions according to the direction of airflow. How to choose a good ultra-clean workbench has become a headache for users and buyers. Today, Esco will give you a few tricks, hoping to help everyone, to buy their favorite ultra-clean workbench. Before you buy and use the ultra-clean workbench, you need to know how it works. working principle The working principle of the 100-stage 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 "hee efficiency particulate air filter (HEPA)" 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. classification According to the operation method to classify them, they can be divided into: single-sided single-sided, single-sided double-sided, double-sided single-sided, double-sided double-sided, three-sided single-sided and other five kinds of ultra-clean workbench. According to its airflow direction, it can be divided into horizontal unidirectional flow ultra-clean workbench, vertical unidirectional flow ultra-clean workbench and non-unidirectional flow ultra-clean workbench. Horizontal unidirectional flow ultra-clean workbench: The filtered clean air is directly blown to the operator from the back to the front. It is a versatile local clean bench. It is widely used in electronics, defense, precision instruments, instruments, Pharmaceutical industry, etc. Vertical unidirectional flow ultra-clean workbench: Vertical flow means that the filtered clean air is blown from top to bottom to the ultra-clean countertop, and then blows out the clean bench forward and backward. The vertical flow of the clean bench is usually in the laboratory. Used in biopharmaceutical, optoelectronics, microelectronics, hard disk manufacturing and other fields. Many users will wonder why the structure of the clean bench is a shell fan and a two-layer filter, but the price difference is so large? Esco will answer you one by one. 1. Materials The appearance of some ultra-clean workbench is more delicate and novel, and the stainless steel material used in the material is better, so there is a higher cost on the outer casing. For example, Esco's ultra-clean workbench table top is made of one piece of stainless steel plate for one-time stamping, large arc angle design, no welding, easy to clean; the front edge is raised to avoid liquid spillage and increase operating comfort. The external selection of Isocide TM bacteriostatic material, the main component contains silver ions, has a long-term antibacterial effect, and will not be eliminated due to surface cleaning. The fan and filter of the clean bench represent the technical level of the product. Therefore, the fan is also a component to distinguish the price. The good ultra-clean workbench usually uses the imported fan. The fan has low noise and low vibration, so the operator can experiment in a quiet environment, and the vibration of the ultra-clean workbench will also affect. Go to the normal experiment. For example, the Esco Airstream ® series of ultra-clean workbench uses a new generation of DC ECM fans, which is more efficient than traditional ECM and VFD inverter motors, saving 70% of electricity consumption compared to AC motors, even in building voltage fluctuations and loads. In this case, a constant wind speed is still maintained. It also provides ISO Class 5 cleanliness in the standby mode while further reducing energy consumption. 3. Filter The biggest impact on the price fluctuation of the ultra-clean workbench is the filter. Since the filter directly affects the cleanliness and service life of the ultra-clean workbench, the filter with good quality will have a much higher cost in the lower grade filter. For example, the Esco ACB series of ultra-clean benches use a high-efficiency filter (HEPA) with a 99.99% retention efficiency for 0.3μm particle systems; and the Esco Airstream ® series of ultra-clean benches use U15 ultra-low permeability air filtration. Ultra Low Penetration Air Filter (ULPA), ULPA has a filtration efficiency of more than 99.9999% for microparticles above 0.3 microns. Compared with HEPA, ULPA has a more compact filter structure and higher filtration efficiency. The ULPA filter has a larger filtration area and a higher dust holding capacity, providing ISO Class 3 cleanliness for the work area, superior to the industry standard ISO Class 5, and the work area is 10 times cleaner than the HEPA high efficiency filter. Of course, the length of the filter's service life is related to the cleanliness of the air and the frequency of use of the instrument. In the temperate zone, the ultra-clean workbench can be used in general laboratories. However, in tropical or subtropical regions, due to the high level of pollen or dusty areas in the atmosphere, the ultra-clean workbench 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. 4. Control panel The selection and use of a clean bench also requires an understanding of the principles and ease of operation of the appliance, the specifications and performance of fluorescent and UV germicidal lamps. On the one hand, this is to judge the quality of the product, and the second aspect is to ensure the data record for future maintenance. For example, Esco Airstream ® series of ultra-clean workbench uses Sentinel TM Gold microcomputer controller, with touch button control function setting, to achieve troubleshooting, parameter setting and grading menu into integrated operation; instrument safety status can be clearly displayed, intake air flow And the downdraft can easily realize real-time monitoring; the special sound and light alarm prompt function promptly reminds the user to find and deal with the problem; the program starts the UV lamp to perform the time disinfection and sterilization function, allowing the user to operate safely in a sterile environment. 5. After sales service Although the advancement and development of science and technology make the level of after-sales service related to ultra-clean workbench and maintenance, repair and other services higher and higher, but due to improper use of the user or negligence of the staff, there are various situations in which the device panel is not sensitive. Occasionally, including the best companies can not guarantee that no mistakes will occur and customer complaints will be caused. Therefore, timely remediation of mistakes, correction of errors, and effective handling of customer complaints and other after-sales service measures have become the most effective way to ensure the consumer rights of ultra-clean workbench equipment. When purchasing a clean bench, you should consider the after-sales service capabilities of the product manufacturer. For example, you can enjoy Esco's excellent after-sales service by purchasing Esco's ultra-clean workbench. Esco's strong after-sales service team provides customers with comprehensive and reliable services, including spare parts safety reserves and technical support. The service system includes on-site engineering, factory engineers and after-sales service representatives. For priority/customer, 24/7 response, 24/7 telephone and on-site support services provide a one-stop solution for your device from installation to replacement. The difference between ultra-clean workbench, biosafety cabinet and fume hood Some users may be confused about the use of ultra-clean workbench, biosafety cabinets and fume hoods when purchasing clean equipment. The ultra-clean workbench is used for aseptic and dust-free experimental operation to protect the sample inside the station and the surrounding environment, but it is not protective to the operator in front of the stage, so it is impossible to carry out some biologically hazardous sample operations; The biosafety cabinet protects the sample and the surrounding environment while protecting the operator in front of the station; the fume hood is a suction device, and the wind is drawn into the station 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 workbench. Frozen Squid,Whole Round Squid,Round Squid,Loligo Squid ZHEJIANG EVERNEW SEAFOOD CO.,LTD , https://www.evernewseafood.com
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