Airlocks have different uses that are considered separately in clean room designs.
What is airlock?
Airlock is actually a type of closed clean room that has two or more doors between two controlled areas with different cleanliness classes such as class C-D or B-C, etc.
The use of airlocks is an established principle in clean room design, despite the apparent simplicity, placing small rooms in the plan of a pharmaceutical or medical equipment site, etc., the type of use and their proper definition in the plan creates confusion, airlocks They have several distinct functions, although they are closely related, but they are separate from each other.
Airlocks from the clean area or clean room with different classes, in order to maintain the pressure difference, prevent contamination transmission, etc. They protect goods and people during entry and exit and are also used to separate clean rooms with different classifications. Airlocks prevent the direct flow of air between these areas during the entry and exit of goods and people.
What is PAL and MAL?
If the airlock is used for the entry of personnel, it is called (Personnel air lock) or PAL, and if it is used for the entry and exit of materials, it is called (Material air lock) or Mal.
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