Air exhaust requirements of Biosafety cabinet A2 B2

Air exhaust requirements of Biosafety cabinet A2 B2
Biosafety cabinet A2/B2 air exhaust requirements In the selection of Biosafety cabinet, care should be taken not to one-sided think that it is safer to connect the exhaust pipe (Durkduct) to the outdoor (sh ì w à i) than to exhaust it to the indoor (indoor), and blindly select the full exhaust type (B2). Biosafety cabinet are widely used in medical and health, disease prevention and control, food hygiene, biopharmaceuticals, environmental monitoring, various biological laboratories and other fields. They are an important basis for ensuring biosafety and environmental safety, and belong to the category of "people's livelihood" measurement. In fact (Fact), the gas discharged from the Biosafety cabinet can meet the safety requirements after being filtered through the high-efficiency (high efficiency) filter at the exhaust outlet. At present, * * Class II A2 Biosafety cabinet (30% discharged, 70% internal circulation) is widely used. The Engine displacement is about 700~1200 m3/h, and the B2 Biosafety cabinet full discharge (100% discharged) is 1000~1600 m3/h. Some models are higher, and rooms are supplemented (b ǔ  Ch ō Ng) The air volume is insufficient, and the Biosafety cabinet cannot work normally. Class II B2 Biosafety cabinet can only be used when operating and controlling a large amount of volatile chemical reagents or radionuclides.
Biosafety cabinet A2/B2 exhaust air (p á i f ē Ng) Requirements
If Class II A2 Biosafety cabinet exhausts gases, it is recommended that the exhaust pipe be connected with casing pipe and installed with casing pipe（ ā N zhu ā Ng) A 2.5cm gap shall be reserved between the exhaust pipe of the Biosafety cabinet and the high-efficiency filter of the Biosafety cabinet, so that the air in the room can also be sucked into the exhaust system of the building. This connection mode is * * safe. The air flow balance in the cabinet is independent of the exhaust system, and no matter how the air flow balance in the cabinet fluctuates, it will not be affected. The Biosafety cabinet is designed to protect the operator, laboratory environment and experimental materials from exposure to infectious aerosols and splashes that may be generated during the above operations when operating infectious experimental materials such as primary cultures, bacterial strains and diagnostic specimens.
Class II A2 pipe connection to exhaust system
The Class II B2 biosafety (safety) cabinet must be connected through a hard pipe and sealed to the exhaust system. The exhaust air volume (defined as the air flow rate per unit time) and static pressure of the exhaust system must be consistent with the requirements specified for the safety cabinet. The Biosafety cabinet is designed to protect the operator, laboratory environment and experimental materials from exposure to infectious aerosols and splashes that may be generated during the above operations when operating infectious experimental materials such as primary cultures, bacterial strains and diagnostic specimens. During installation（ ā N zhu ā Ng) When there are multiple Class II B Biosafety cabinet, they should use separate exhaust ducts (Conduit) instead of sharing exhaust ducts.
Both the No. 424 Order of the State Council of the People's Republic of China issued in 2004 and the standard GB19489 of the State Council of the People's Republic of China clearly point out that the Biosafety cabinet is a protection (b ǎ O h ù) Essential main safety equipment for staff; Biosafety cabinet should be used in hospital clinical testing, diagnosis, pathological analysis, tumor drug preparation and related biomedical research institutes and laboratories.