MIL-PRF-51527 Filter Set, Gas-Particulate, 200 Cfm, M98This specification covers a set of gas and particulate filters rated at 200 cubic feet per minute \(cfm\) for use in Collective Protection Equipment \(CPE\) \(see 6.1\).

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12

MIL --- PRF --- 51527B

3.5.5 Workmanship.

a. The filter sets shall be free from foreign matter (dirt, oil, or viscous materials).

b. The filter sets shall be free from cracked, bent, or dented metal sections, and

abraded gaskets.

4. VERIFICATION

4.1 Classification of inspections. The inspection requirements specified herein are classi-

fied as follows:

a. First article inspection (see 4.2)

b. Conformance inspection (see 4.3)

4.2 First article inspection.

4.2.1 Sample. The first article sample shall consist of 20 gas --- particulate filter sets

manufactured using the same methods, materials, equipment, and processes as will be used

during regular production. The first article sample shall be submitted for inspection and ap-

proval in accordance with the terms of the contract.

4.2.2 Inspections to be performed. Unless otherwise specified by the terms of the contract,

the sample first article items shall be subjected to all of the verifications specified in this specifi-

cation. Verification of requirements shall be by examination, (examination includes visual in-

spection with or without simple commercial measuring devices), demonstration, test data, or by

Certificate of Compliance (COC) with analysis or supporting evidence. The Government re-

serves the right to accept or reject each COC. First article filters shall be inspected according

to Figures 3 and 4, or as determined by the Government (see 6.2). Each filter shall be examined

for interface characteristics, identification markings, workmanship, and safety hazards. Each

filter shall then be tested for airflow resistance. Each gas filter shall be tested for leakage and

each particulate filter shall be tested for filtration efficiency. Following moisture content test-

ing of adsorbent material, sample gas filters shall be packaged using the same methods, materi-

als, equipment, and processes as will be used during regular production. Packaged filters shall

then be forwarded to the Government for rough handling and additional tests. Any packaged

sample filters forwarded to the Government shall be protected from moisture in the air. Re-

quirements and verification methods are cross referenced in Table I.

4.2.3 Acceptance criteria. If any first article sample item fails to comply with any of the ap-

plicable requirements, the first article sample shall be rejected.