Basic Documentation

Room Pressurization Control Application Guide
CLEAN SPACE
FLOOR
EXHAUST
RISER*
CEILING SUPPLY*
SLIDING OR
HINGED DOORS
CEILING SUPPLY*
NON CLASSIFIED CORRIDOR
LAB0204R1
Figure 13. Potent Compound Airlock.
Airlock Construction
Proper airlock construction is critical to ensuring that the required pressurization levels can
be attained. All surfaces should be well sealed and covered with a highly impervious finish
such as epoxy paint.
Airlock doors can be either hinged or sliding. Hinged doors can typically be made to fit tighter
(have less peripheral leakage area) especially if the frame is equipped with a seal or gasket
and floor sweeps are used. When hinged doors are used, they should open into the dirtier
area. Table 3 provides information on door leakage areas in inch-pound units.
38 Siemens Building Technologies, Inc.