Air flow pattern in pharmaceutical clean room
Air flow pattern in pharmaceutical clean room
The airflow pattern of the pharmaceutical clean room should meet the requirements of the air cleanliness level. When the air cleanliness is Class A, the airflow should adopt a unidirectional flow pattern; when the air cleanliness is Class B, Class C, and Class D, The airflow should adopt a non-unidirectional flow pattern, and the non-unidirectional flow airflow pattern should reduce the vortex area; in...
Text label: clean room design and installation, pharmaceutical clean room, clean room airflow
Pharmaceutical clean room airflow pattern
The airflow pattern of the pharmaceutical clean room should meet the requirements of the air cleanliness level. When the air cleanliness is Class A, the airflow should adopt a unidirectional flow pattern; when the air cleanliness is Class B, Class C, and Class D, The air flow should adopt a non-unidirectional flow pattern, and the non-unidirectional flow air flow pattern should reduce the vortex area; in a clean room with mixed air flow, the air flow direction should flow from the higher end of the space to the slightly lower end; the air flow rate should meet the Production process, air cleanliness level and human hygiene requirements.
Air supply and return methods of air flow in pharmaceutical clean room:
Cleanliness level
Air flow pattern
Air supply and return air
Grade A
One-way flow
Horizontal, Vertical
Grade B
Non-unidirectional flow
Top send lower side return, upper side send lower side return
Class C
Non-unidirectional flow
Top send lower side return, upper side send lower side return
Class D
Non-unidirectional flow
Top feed to the lower side, top to the lower side, top to the top
Corridor return air should not be used in clean rooms that emit dust or harmful substances, and it is not easy to use top return air; it is not easy to arrange clean workbenches in unidirectional flow areas, and unidirectional flow should be set up in non-unidirectional flow clean rooms When cleaning the workbench, its location should be far away from the return air outlet; an air outlet should be set near the process equipment that is prone to pollution; when there is equipment with a large amount of heat, measures should be taken to reduce the influence of hot air on air distribution; there are local exhaust devices or The process equipment that needs to be exhausted should be arranged on the leeward side of the clean room; the residual pressure valve should be arranged on the leeward side of the clean air flow. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for dust-free workshops and purification projects.
The air supply volume of the pharmaceutical clean room should take the maximum value calculated from the following items: the air supply volume required to maintain the level of the clean room, and the air supply volume is calculated and determined according to the number of particles generated in the room; The supply air volume determined by the wet load calculation; the supply air volume determined by the 'recovery time' required to maintain the cleanliness level; the fresh air supply to the clean room.
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