【讨论】Types and Requirement of Airlocks in Controlled Areas

zhulikou431

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Airlock helps to protect the classified area from the contamination that may
occur during the entry and exit of personnel and material.

Airlocks are closed rooms having two or more doors between two different
controlled areas having different cleanliness levels as class B and class C,
class C and class D areas. These airlocks prevent the direct air flow between
these areas during the entry of material or personnel. Airlocks are called PAL
(Personnel Air Lock) when used for personnel and MAL (Material Air Lock) when
used for transferring the material.

Related: Clean Rooms and Controlled Areas (Sterile Area Classification)

There are three types of airlocks:
A. Cascade Airlock
B. Bubble Airlock
C. Sink Airlock
A. Cascade Airlock: These airlocks are very common having higher pressure on one
side and lower pressure on another side. This prevents to enter dust and
contaminants from outside to airlock and from airlock to inner side.
B. Bubble Airlock: These types of airlocks have higher pressure inside the
airlock and lower pressure in both outsides. This prevents the flow of air
between two areas through the airlock creating a pressure barrier.
C. Sink Airlock: Airlocks having lower pressure inside the airlock and higher
pressure on both sides of the airlock. This airlock pulls air from both adjacent
areas creating a low pressure barrier.

Doors of the airlocks should open to higher pressure side; it will help to close
the door. An interlocking system should be provided to prevent the opening of
both doors at a time. An alarm should be provided to indicate that one door is
opened. It helps to prevent the entry of contamination through the airlocks.
Higher air changes per hour rate should be maintained in the airlock, it should
be minimum 20 air changes per hour. It helps to remove the contaminants entered
from the outside easily.

Airlocks should be kept empty, material such as garments, shoes covers etc.
should not kept in the airlocks. I have observed it many times in
pharmaceuticals keeping these articles in airlocks.

豫北风云

脸皮真厚啊！

paul3122

豫北风云 发表于 2014-4-8 14:53
脸皮真厚啊！

什么情况？又是转载？

paul3122

这段话出自哪里？

zhulikou431

豫北风云 发表于 2014-4-8 14:53
脸皮真厚啊！

你家的鸡多，下的蛋多

andysyq

分析的很好，求出处！！！！！

andysyq

空气锁装置用于保护不同等级区域在人员和物料进出时可能发生的污染情况。

气锁间作为一个封闭的房间，在（如B级和C级，C级和D级）的不同洁净等级区域之间拥有两个或更多的门。在物料和人员进入时，气锁能够避免这些不同等级区域间的直接气流。当用于人员时，气锁叫做PAL；用于传送物料时，气锁叫做MAL。