Installation requirements for biological safety cabinets in biological safety laboratories

Installation requirements for biological safety cabinets in biological safety laboratories

Overview of Biological Safety Cabinets

The biological safety cabinet is a protective barrier for biological safety. Its working principle is to filter the outside air through a high-efficiency air filter through the power source and send it to the safety cabinet to avoid contamination of the processed samples. At the same time, through the power source.. .

Text label: biosafety laboratory, biological laboratory, biosafety cabinet installation

Installation requirements for biological safety cabinets in biological safety laboratories

Overview of Biological Safety Cabinets

The biological safety cabinet is a protective barrier for biological safety. Its working principle is mainly to filter the outside air through a high-efficiency air filter through the power source and send it to the safety cabinet to avoid contamination of the processed samples. External suction, the air in the cabinet after being filtered by a high-efficiency air filter (except for the Class I biological safety cabinet) is discharged to the external environment, so that the cabinet can maintain a negative pressure state. The device can protect experimental samples from external contamination while avoiding exposure of operators to harmful or unknown biological aerosols and splashes generated during experimental operations. Zhongjing Global Purification can provide consulting, planning, design, construction, installation and transformation of dust-free workshops, purification workshops, GMP workshops, clean rooms, sterile rooms, laboratories and other supporting services.

my country Product Standard (Biosafety Cabinets) JG

170—2005 Classified and classified according to several important characteristics of safety cabinet exhaust method, circulating air ratio, air flow form in cabinet, average inlet air speed of working window and protection objects. Biological safety cabinets are divided into three levels; namely, Class I, Class II and Class III biological safety cabinets, of which Class II biological safety cabinets are further divided into four types: A1.A2, B1, and B2. At present, the most used biosafety cabinets in domestic biosafety laboratories are Class III A2 and B2 biosafety cabinets.

The problem often faced in the design and construction stage of biosafety laboratory is the selection of A2 and B2 biological safety cabinets: B2 safety cabinets are full row safety cabinets, which are relatively safe for operators, but B2 biological safety cabinets are relatively safe for operators. The exhaust air volume of the safety cabinet is large, which requires supplementary air, high energy consumption, high operating costs, and the problem of interlocking control of exhaust air and supplementary air, which requires high requirements for the automatic control system. Selection should not be over-selected.

my country's current national standard 'Technical Specifications for Biosafety Laboratory Buildings' GB50346 gives the principle of selecting biosafety cabinets for biosafety laboratories, and laboratories can choose suitable biosafety cabinets according to actual use conditions. For the protection of radioactivity, due to the possible cumulative effect, even a small amount, it is recommended to use a full-row biological safety cabinet.

On-site installation and location requirements of biological safety cabinets

1. Field Installation Requirements for Biological Safety Cabinets

The on-site installation requirements of biological safety cabinets should meet the following principles:

(1) The installation position of the biological safety cabinet should ensure that there is no less than 1000mm space for personnel activities in front of the front panel.

(2) The distance between the back and sides of the biological safety cabinet and the wall or other furniture and equipment should not be less than 300mm, and the distance between the top and the ceiling should not be less than 300mm.

(3) The distance between the front panel of the biological safety cabinet and the opposite side wall should not be less than 2000mm.

(4) The distance between the front panel of the biological safety cabinet and the contralateral experimental bench should not be less than 1500mm, and the distance between the side of the biological safety cabinet and the vertical experimental bench should not be less than 1000mm.

(5) When two biological safety cabinets are arranged opposite to each other, the distance between their front panels should not be less than 3000mm. When two biological safety cabinets are arranged adjacently, the distance between their side panels should not be less than 1000mm.

(6) When two biological safety cabinets are arranged vertically, the distance between the front panel of one biological safety cabinet and the side of the other biological safety cabinet should not be less than 1200mm.

(7) The location of the biological safety cabinet should avoid the walking route of personnel in the laboratory as much as possible, so as to avoid the movement of personnel affecting the airflow of the front panel of the biological safety cabinet. The position of the biological safety cabinet should avoid the front panel being too close to the air supply equipment to avoid affecting the airflow of the front panel of the biological safety cabinet.

(8) The biological safety cabinet should be placed at the door of the laboratory as far as possible. The distance between the front panel of the biological safety cabinet and the door should not be less than 1500mm, and the distance between the side of the biological safety cabinet and the door should not be less than 1000mm.

2. Site location requirements for biological safety cabinets

The on-site location of the biological safety cabinet should avoid horizontal or vertical interference caused by the air supply outlet to the horizontal airflow of the biological safety cabinet.

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