According to the difference in the level of biological safety protection, biological safety cabinets are divided into three types: primary, secondary and tertiary. A biological safety cabinet protects workers and the environment without protecting the sample. Its air flow principle is basically the same as that of a laboratory fume hood. The difference is that the exhaust port is equipped with a HEPA filter to filter the outer exhaust stream to prevent the diffusion of microbial aerosols and cause pollution. The Class I biological safety cabinet itself has no fans and relies on the fans in the external ventilation ducts to drive the air flow. Since the products in the cabinet cannot be protected, it has been used less frequently.
The secondary biological safety cabinet is currently the most widely used cabinet type. According to the provisions of the “People's Republic of China Pharmaceutical Industry Standard YY0569-2005 Biological Safety Cabinetâ€, the secondary biological safety cabinets can be divided into four levels according to the inlet air velocity, exhaust method and circulation method: A1 type, A2 type, B1 type And B2 type. All secondary biological safety cabinets provide protection for workers, the environment and products. Laboratory sterilization
The minimum airflow velocity or measurement average of the front window of the A1 safety cabinet should be at least 0.38m/s. 70% of the gas is recycled to the work area through the HEPA filter, and 30% of the gas is filtered out through the exhaust port.
The minimum airflow velocity or mean value of the front window of the A2 safety cabinet should be at least 0.5 m/s. 70% of the gas is recycled to the work area through the HEPA filter, and 30% of the gas is filtered out through the exhaust port. HPV disinfection
The Type II B biological safety cabinets are safety cabinets connected to the exhaust system. The fan connected to the exhaust pipe of the safety cabinet is connected to the emergency power supply. The purpose is to maintain the negative pressure of the safety cabinet under power off to avoid leakage of dangerous gases such as the laboratory. The minimum amount of front window airflow velocity or measurement should be at least 0.5m/s (100fpm).
The B1 type 70% gas is discharged through the exhaust HEPA filter, and 30% of the gas is recycled to the work area through the air supply HEPA filter.
The Type B2 is a 100% full-flow safety cabinet with no internal recirculating air flow. It can provide both biological and chemical safety control, and can operate microbiological experiments with volatile chemicals and volatile nuclear radiation as additives.
The Class III biological safety cabinet is designed for a biosafety class 4 laboratory. The cabinet is completely airtight. The staff is operated through the glove connected to the cabinet, commonly known as the Golve box. The test article passes the double The pass-in box of the door enters and exits the safety cabinet to ensure no pollution, and is suitable for high-risk biological tests such as SARS and Ebola-related experiments.
According to the mandatory industry standard for biosafety cabinets, “The People's Republic of China Pharmaceutical Industry Standard YY0569-2005 Biosafety Cabinetâ€, only those products that have obtained the three types of medical device registration certificates issued by the State Food and Drug Administration can truly protect operators and experiments. Room environment and operational samples. Biosafety cabinets provide triple protection of people\samples and the environment.
Zhejiang Sujing Purification Equipment Co., Ltd. is located in Daoshui Town, Shangyu District, Shaoxing City, Zhejiang Province, and is an excellent manufacturer in the purification equipment industry in East China. Can provide professional air purification systems for industries such as microelectronics, biomedicine, hospital operating rooms, fiber optic cables, food and beverages, precision instruments, semiconductors, and new material applications in accordance with the ISO14644-1 standard, GB50073-2001 national standard, and national GMP specifications. Engineering design, construction, testing and technical services.
The company's main purification table series, air shower series, fume hood series, biological safety cabinet series are widely used in medical and health, electronics, pharmaceuticals, biology, food, agriculture, forestry, animal husbandry and veterinary, inspection and quarantine, aerospace, automotive manufacturing, Precision instruments, universities and research institutes enjoy a high reputation in the domestic and Southeast Asian markets.
Zhejiang Sujing Purifying Equipment Co., Ltd. is dedicated to serving consumers and distributors all over the world. We will provide you with the best quality products, the most humane services and the lowest price. We sincerely welcome you to join us!
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