Chapter - 3
MNL000442.doc
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09/19/2016
© Versum Materials, Inc. as of the revision and date shown. All rights reserved.
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3.7 Enclosure Exhaust System Requirements
1.
In order to meet SEMI S2 criteria in HPM (Hazardous Production Material)
gas service, the enclosure should control emissions into the room to less than
25% TLV (Threshold Limit Value) of the HPM gas in the event of an
internal leak.
2.
In order to meet NFPA criteria (U.S.A. only) in HPM gas service, air
velocity across the opened access hatch (where used) must meet the
following velocity requirements to minimize potential operator exposure to
hazardous gas: 200 feet per minute average, with 150 feet per minute
minimum at any point (61 meters per minute average, with 46 meters per
minute minimum).
3.
In order to meet NFPA (U.S.A. only) and Versum Materials, Inc. minimum
recommended safety requirements for enclosed Silane gas service,
volumetric air flow through the cabinet must be at least 250 times the
maximum potential leak rate. In order to meet the recommended CGA G-13
requirements, volumetric air flow through the cabinet must be at least 300
times the maximum potential leak rate.
The values listed in the tables below should
serve as a guideline for reference only.
Enclosure ventilation systems must:
(1)
Be designed, installed, and balanced to
suit individual facility requirements.
(2)
Comply with applicable local, state, and
federal codes.