· Air locks helps to protect the classified area
from the contamination that may occur during the entry and exit of personnel
and material.
· Air lock prevent the direct air flow between two
different area.
· Air locks controlled the air changes.
· Air locks creating a pressure barrier.
· Airlocks are closed means having two or more
doors between two different controlled area.
Air locks are called 2 types :
1. PAL –
Personnel Air lock (for used for personnel entry)
2. MAL –
Material Air Lock (for used for material entry)
Three types Air lock
- Cascade Air Lock:
· These air locks very common
· Higher pressure one side and lower pressure
another side
· Prevent the dust and contamination.
- Bubble Air Lock:
· Higher pressure inside and lower pressure in
both out sides.
· Air locks creating a pressure barrier.
- Sink Air Locks:
· Lower pressure inside and higher pressure on
both sides of the air lock.
· These air locks pulls air from the adjacent
areas creating lower pressure barrier.
Interlocking system prevent
the opening of both doors at a time.
Alarm also indicate that one door is opened.
- Air locks should be kept empty.
