Basic Documentation

Clean Rooms
• Potent Compound
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Airlock—Figure 13 shows a pressure bubble airlock combined
with a pressure sink airlock. This two-compartment airlock arrangement allows
personnel to protect themselves by putting on Personal Protective Equipment (PPE),
such as outer garments and sometimes respirators, in the pressure bubble area (++)
before entering the pressure sink area (– –) and clean space area in which the potent
compound substances are present. The negative pressure of the pressure sink area
prevents contamination of the clean space by the adjacent areas such as the
corridor. All clean conditioned supply air to the pressure bubble area (++) flows into
the adjacent pressure sink and corridor. All of the clean conditioned air supplied to
the pressure sink area along with all air that flows into that area is exhausted.
NON CLASSIFIED CORRIDOR
CLEAN SPACE
CEILING SUPPLY*
FLOOR
EXHAUST
RISER*
*CEILING SUPPLY CFM = FLOOR EXHAUST CFM
SLIDING OR
HINGED DOORS
AIRLOCK
LAB0201R1
Figure 10. Cascading Pressure Airlock.
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A potent compound is any substance that can present a danger to anyone coming into physical contact with the substance or
airborne fumes or particulate from the substance.
Siemens Building Technologies, Inc. 35