MIL --- PRF --- 51527B
SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)
SAE AMS 3195
Silicone Rubber Sponge, Closed Cell, Medium
(Copies are available from SAE, 400 Commonwealth Dr., Warrendale, PA 15096 or
https://www.sae.org.)
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)
ISO 12103 --- 1 Road Vehicles --- Test Dust for Filter Evaluation --- Part 1
(Copies are available online from https://www.iso.org.)
UNDERWRITERS LABORATORY, INC (UL)
UL 900 Air Filter Units --- Standard for Safety
(Copies are available online from https://www.comm --- 2000.com.)
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspec-
tions in accordance with 4.2.
3.2 Interface requirements.
3.2.1 Size and shape. The filter set shall be consist of one gas filter and one particulate filter,
both rated at 200 scfm. Each gas and particulate filter in the set shall be separable and not per-
manently attached to each other. The particulate filter shall fit inside the gas filter. Each filter
in the set shall be cylindrical in form and configured so that air shall flow through the filter ra-
dially outward. Each filter set shall fit easily into its intended housing (see 6.4) and be removed
with no damage to itself or the surrounding components. Each shall have strict tolerances for
proper housing interface and meet the interface dimensions in Figure 1 and 2, respectively.
Each filter end or end cover shall contain one groove for gasket location. The gasket shall be
grade number 2C1 of ASTM D1056, or silicone rubber per SAE AMS --- 3195, be seamless, and
have a thickness of 0.787 cm (0.31 in). The gasket shall permanently attached to the filter with
an adhesive.
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