1、INCH-POUNDDISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.MIL-DTL-51194D(EA)8 July 2003SUPERSEDINGMIL-F-51194C(EA)6 September 1990DETAIL SPECIFICATIONFILTER, PARTICULATE, 20 CFM, M19This specification is approved for use by the U.S. Army EdgewoodChemical Biological C
2、enter, Department of the Army, and is availablefor use by all Departmentsand Agenciesof theDepartment ofDefense.1. SCOPE1.1 Scope. This specification covers one type of particulate filter rated at 20 standard cubicfeet per minute airflow.2. APPLICABLE DOCUMENTS2.1 General. The documents listed in th
3、is section are specified in sections 3 and 4 of thisspecification. This section does not include documents cited in other sections of this specifica-tion or recommended for additional information or as examples. While every effort has beenmade to insure the completeness of this list, document users
4、are cautioned that they must meetall specified requirements documents cited in sections 3 and 4 of this specification, whether ornot they are listed.2.2 Government documents.2.2.1 Specifications, standards, and handbooks. The following specifications, standards,and handbooks form a part of this docu
5、ment to the extent specified herein. Unless otherwisespecified, the issues of these documents are those listed in the issue of the Department of De-AMSC N/A FSC 4240Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of usein improving this document should
6、 be addressed to: Technical Director, U.S. Army Edgewood ChemicalBiological Center, ATTN: AMSSB- REN- SE- SS, Aberdeen Proving Ground, MD 21010- 5424 by usingthe self- addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at theend of this document or by letter.Provided by
7、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-51194D(EA)2fense Index of Specifications and Standards (DODISS) and supplement thereto, cited in thesolicitation (see 6.2).STANDARDSDEPARTMENT OF DEFENSEMIL-STD-282 - Filter Units, Protective Clothing, Gas
8、-Mask Componentsand Related Products: Performance - Test Methods(Unless otherwise indicated, copies of federal and military specifications, standards, andhandbooks are available from the Standardization Documents Order Desk, Building 4D, 700Robbins Avenue, Philadelphia, PA 19111-5094.)2.2.2 Other Go
9、vernment documents, drawings, and publications. The following other Gov-ernment documents, drawings, and publications form a part of this document to the extent spe-cified herein. Unless otherwise specified, the issues are those cited in the solicitation.U.S. ARMY EDGEWOOD CHEMICAL BIOLOGICAL CENTER
10、DRAWINGS5-19-1175 - Filter, Particulate, 20 CFM, M19 Assembly(Copies are available from Technical Director, U.S. Army Edgewood Chemical BiologcalCenter, ATTN: AMSSB-REN-SE, Aberdeen Proving Ground, MD 21010-5424.)2.3 Order of precedence. In the event of a conflict between the text of this document a
11、nd thereferences cited herein, the text of this document takes precedence. Nothing in this document,however, supersedes applicable laws and regulations unless a specific exemption has been ob-tained.3. REQUIREMENTS3.1 Materials, components, and assembly.3.1.1 Materials. All materials cited on Drawin
12、g 5-19-1175 and on the subsidiary drawingsshall conform to the specifications listed thereon or to the specific characteristics set forth onthe drawings.3.1.2 Components. All components of the particulate filter shall conform to the specifica-tions and drawings listed on Drawing 5-19-1175 and subsid
13、iary drawings.3.1.3 Assembly. The particulate filter shall be assembled as specified on Drawing5-19-1175.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-51194D(EA)33.2 Airflow resistance. The resistance to airflow shall be no greater than 1.2
14、5 inches of wa-ter gage (iwg) at an airflow rate of 20 cubic feet per minute (cfm) at standard conditions (70 Fand 1013 mbar).3.3 Filtration efficiency. The filter shall be no less than 99.97% efficient in the removal ofaerosols with a mean diameter of 0.3 microns.3.4 Resistance to rough handling. T
15、he filter shall meet airflow resistance, filtration efficien-cy, and air leakage requirements after rough handling for 15 minutes at an amplitude of 3/4inchwith the filter face, pleats, and separators in a vertical position.3.5 Air leakage. Air leakage (in and around gasket area) shall be not greate
16、r than 0.91 cubicinches per minute when the filter is internally pressurized to a pressure of not lessthan 12inchesof water.3.6 Workmanship. The filter shall be free from chipped, burred, or bent metal sections andloose or damaged gaskets; foreign matter, such as oil or viscous substances, and rips,
17、 tears, orholes in the filtering medium.3.7 First article. When specified (see 6.2), a sample of filters shall be subjected to first arti-cle inspection in accordance with 4.2.4. VERIFICATION4.1 Classification of inspections. The inspection requirements specified herein are classi-fied as follows:(a
18、) 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 particulate filters manufacturedusing the same methods, materials, equipment, and processes as will be used during regularproduction. The fi
19、rst article sample shall be submitted for inspection and approval in accor-dance with the terms of the contract.4.2.2 Inspections to be performed. As determined by the Government, the sample first ar-ticle items may be subjected to any or all of the examinations and tests specified in this specifica
20、-tion and be inspected for compliance with any or all of the requirements of the applicabledrawings.4.2.3 Acceptance criteria. If any first article sample item fails to comply with any of theapplicable requirements, the first article sample shall be rejected. The Government reservesthe right to term
21、inate inspection upon any failure to comply with any of the requirements. TheProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-51194D(EA)4contractor shall obtain written approval from the contracting activity prior to proceeding withregular pro
22、duction.TABLE I. First article requirement verification matrixCharacteristicRequirementParagraphVerificationParagraphMaterials, components, and assembly 3.1 4.4.1Airflow resistance 3.2 4.4.2Filtration efficiency 3.3 4.4.3Rough handling 3.4 4.4.4Air leakage 3.5 4.4.5Workmanship 3.6 4.4.64.3 Conforman
23、ce inspection.4.3.1 Lotting. A lot shall consist of the filters produced by one manufacturer, at one plant,from the same materials, under essentially the same manufacturing conditions, and offered foracceptance at one time; however, no more than one lot of filter material shall be representedin any
24、one lot of finished filters. Each lot shall be identified by an alphanumeric lot number.The lot number shall include a manufacturers identification symbol consisting of 3 alpha char-acters, a numeric code identifying the year of production, a code or abbreviation that signifiesthe month of productio
25、n, and an interfix-serial number. The interfix-serial number shallchange if there is a change in the design, manufacturing process, materials, suppliers, produc-tion run, or if a new contract is used.4.3.2 Sampling. Sampling shall be conducted in accordance with the classification of char-acteristic
26、s in 4.3.5 and, when specified, table I. Samples shall be selected at random.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-51194D(EA)5TABLE I. SamplingLot size Inspection levels and sample sizesI III IV V VIIVI2 to 89 to 1516 to 2526 to 505
27、1 to 9091 to 150151 to 280281 to 500501 to 12001201 to 32003201 to 1000010001 to 3500035001 to 150000150001 to 500000500001 and over* * * * 5 2*125012501250125012501250*125125125125125192294294345435*3232323248737386108123156189131313131320293442506074901025557111316192329354040402355679111315151515
28、15VIII IX*Indicates one hundred percent inspection. If sample size exceeds lot size, performone hundred percent inspection.Accept the lot represented on zero nonconforming characteristics and reject the lotrepresented on one or more nonconforming characteristics for all inspection levels.*8888121921
29、27353846566464333567101115182229292929X XI*2020202020474753687796119143*5050505075116116135170200244II*315315315315315490715715*4.3.3 Inspection procedure. Every item in the lot shall be inspected for critical characteris-tics. Sample filters shall be examined and tested in accordance with the class
30、ification of charac-teristics in 4.3.5. If a filter is found that does not conform to any characteristic inspected 100%,such as filtration efficiency and airflow resistance, the non-conforming filter shall be rejectedand removed from the lot. For characteristics other than filtration efficiency and
31、airflow resist-ance, failure of any sample filter to conform to any characteristic in the classification of charac-teristics based on the sampling and acceptance criteria specified therein shall be cause forrejection of the lot represented (see footnote, Table I).4.3.4 Inspection characteristics. Cr
32、itical characteristics are characteristics whose noncon-formance to specified requirements is likely to result in hazardous or unsafe conditions for indi-viduals who use or maintain the product. Characteristics whose nonconformance to specifiedrequirements is likely to prevent performance of the tac
33、tical function of a major end item arealso critical characteristics. Major characteristics are characteristics whose nonconformance toProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-51194D(EA)6specified requirements is likely to result in fai
34、lure or to reduce materially the usability of theitem for its intended purpose. Minor characteristics are characteristics whose nonconformanceto specified requirements is not likely to reduce materially the operation or usability of the itemfor its intended purpose.4.3.5 Classification of characteri
35、stics. Conformance examinations and tests shall be asspecified in the following classification of characteristics paragraphs. Unless otherwise speci-fied, accept on 0 and reject on 1 attributes sampling inspection shall be performed on the desig-nated characteristics using the stated levels in table
36、 I for selection of sample sizes.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-51194D(EA)7PARAGRAPH TITLE DRAWING NUMBERNEXT HIGHER ASSYINSPECTIONCATEGORY CHARACTERISTIC SAMPLING ANDPARAGRAPHNOTES:SHEETCLASSIFICATION OF CHARACTERISTICS1 1OF
37、Filter, particulate, 20 CFM, M194.3.55-19-1175REQUIREMENTMETHODACCEPTANCECRITERIACritical1 Filtration efficiency 100 percent 3.3 4.4.32 Air leakage 100 percent 3.5 4.4.5Major101 Airflow resistance 100 percent 3.2 4.4.2102 Component evident Table I, Level VII 3.1 4.4.1103 Component correctly assemble
38、d Table I, Level VII 3.1 4.4.1104 Marking correct Table I, Level VII 3.1 4.4.1105 Overall dimensions correct Table I, Level VII 3.1 4.4.1106 Workmanship Table I, Level VII 3.6 4.4.6Minor201 Marking legible Table I, Level IX 3.1 4.4.1Provided by IHSNot for ResaleNo reproduction or networking permitte
39、d without license from IHS-,-,-MIL-DTL-51194D(EA)84.4 Verification methods and procedures.4.4.1 Material, components, and assembly. Verify by examination of filter and drawings.Examination involves inspection of the item using the un- aided eye, tools, gages, or other commer-cial measuring devices.4
40、.4.2 Airflow resistance. The airflow resistance shall be determined at the airflow of 20 cfm.The measured pressure dropacross theparticulate filter,when correctedto standardconditionsof 21 C (70 F) and 1 atm (1013 mbar), shall be no greater than that specified in 3.2. The up-stream and down-stream s
41、tatic pressure measuring tubes shall be as close as possible to thefilter and shall not be on a section of duct that has a changing cross sectional area. Test forairflow resistance as follows:(a) Connect the filter to a source of forced air.(b) Set the flow of air through the filter to 20 cfm.(c) Re
42、cord the barometric pressure.(d) Measure and record the air stream temperature.(e) Determine and record the difference between up-stream and downstreamstatic pressure.If the recorded air stream temperature and barometric pressure is different than 21 C (70 F) and 1atm, calculate and record the air f
43、low resistance (DP (cal) using the equation below to correct themeasured airflow resistance to airflow resistance at standard conditions:DP (cal) = DP (measured) x P (test) x 86.21 (492 + 1.8T) 1.768where:D P (cal) air flow resistance corrected to standard conditions in millimeters of watergage (mm
44、wg).P (test) barometric pressure at time of test in millimeters of mercury (mm Hg).D P (measured) air flow resistance from test measurement in millimeters of water.T temperature of air stream flowing through the filter in degrees C.Note: Correction for nonstandard conditions is not required when it
45、is clear that the passage orfailure of the filter is not in doubt.4.4.3 Filtration efficiency. The test apparatus used to measure the filtration efficiency shallbe capable of maintaining a stable concentration of aerosol with a mean particle size of 0.3 mi-crons with a steady flow through the filter
46、 of 20 scfm (see 6.4). The test apparatus shall have thecapability to determine the concentration of aerosol both upstream and downstream of the fil-ter within 0.005%. The downstream sample point shall be located such that changingof itsloca-tion across the ductwork does not cause a significant chan
47、ge in measured concentrations. Thisshall be verified using a filter with a known measurable leak. The filter shall be placed in thetest apparatus such that the flow of air containing the challenge aerosol is in the direction indi-cated by the marking on the filter, and the flow of aerosolized air sh
48、all be maintained at 203Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-51194D(EA)9scfm. This flow shall be maintained for not less than 1 minute or more than 2 minutes. Filtra-tion efficiency is calculated as from the concentrations or particle counts as follows:Penetration % = (concentration downstream of the filter/concentration upstream) x 100, orPenetration % = (no. particles counted downstream/ no. of particles counted upstream) x 100Filtration efficiency % = 1 penetration %4.4.4 Resistance to rough handling. Fifteen
