1、Comments, suggestions, or questions on this document should be addressed to U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or emailed to DAMI_STANDARDIZATIONconus.army.mil. Since contact in
2、formation can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil. AMSC N/A FSC 2940 METRIC MIL-PRF-62309G 17 February 2011 SUPERSEDING MIL-PRF-62309F 12 January 2004 PERFORMANCE SPECIFICATION FILTER ELEMENT, AIR This
3、 specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes the performance, inspection, and acceptance requirements for an air filter element used in the air induction system of the M60 series tank (see 6.1). 2.
4、 APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for additional information or as examples. While every effort has been made
5、to ensure the completeness of this list, document users are cautioned that they must meet all specified requirement documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following speci
6、fications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license f
7、rom IHS-,-,-MIL-PRF-62309G 2 FEDERAL SPECIFICATIONS P-D-245 - Detergent, General Purpose, Laundry and Hand Dishwashing (Granular). DEPARTMENT OF DEFENSE STANDARDS MIL-STD-810 - Environmental Engineering Considerations and Laboratory Tests. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-62337 - Air Cle
8、aner Assembly. (Copies of these documents are available from https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Gover
9、nment documents, drawings, and publications form a part of this specification to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation or contract (see 6.2). U.S. ARMY DRAWINGS 10959032 - Efficiency and Dust Capacity Cap Tester. 10959082 - Master Box
10、 Assembly Gage. 10959091 - Master Box Assembly Gage Calibration and Operating Procedures. 11669740 - Air Filter Element. 12251922 - Air Cleaner Assembly - Steel. 12325888 - Air Cleaner Assembly (Copies of these drawings are available from DAMI_STANDARDIZATIONconus.army.mil or U.S. Army RDECOM, Tank
11、Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000.) 2.2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of t
12、hese documents are those cited in the solicitation or contract (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62309G 3 AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI/ASQC Z1.4 - Sampling Procedures and Tables for Inspection by
13、Attributes (DoD Adopted). (Copies of these documents are available from the American National Standards Institute, 11 West 42nd Street, New York, NY 10036 or website: www.ansi.org ) ASTM INTERNATIONAL ASTM D1149 - Rubber Deterioration - Surface Ozone Cracking in a Chamber, Standard Test Method (DoD
14、Adopted). (Copies of these documents are available from or www.astm.org or ASTM International, PO Box C700, 100 Barr Harbor Drive, West Conshochocken, PA 19428-2959.) INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) ISO 1924-3 - Paper and Board Determination of Tensile Properties Part 2: Constan
15、t Rate of Elongation Method (100mm/min). ISO 1974 - Paper Determination of Tearing Resistance (Elmendorf Method). ISO 2758 - Paper Determination of Bursting Strength. ISO 5011 - Inlet Air Cleaning Equipment for Internal Combustion Engines and Compressors, Performance Testing. (Copies of these docume
16、nts are available from www.iso.org the American National Standards Institute, 11 West 42nd Street, New York, NY 10036.) SAE INTERNATIONAL SAE AS478 - Identification Marking Methods. (Copies of these documents are available from www.sae.org or SAE International, 400 Commonwealth Drive, Warrendale, PA
17、 15096.) TECHNICAL ASSOCIATION OF THE PULP AND PAPPER INDUSTRY (TAPPI) TAPPI T461 - Flame Resistance of Treated Paper and Paperboard (Copies of these documents are available from www.tappi.org or from TAPPI, 15 Technology Parkway S, Norcross, GA 30092.) 2.4 Order of precedence. Unless otherwise note
18、d herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62309G 4 specification sheets), the text of this doc
19、ument takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.1.1 (see 6.3)
20、. First article inspection samples, properly marked with identifying information shall be representative of the unit to be furnished to the Government. All subsequent air filter elements delivered to the Government shall conform to these samples in all of their pertinent physical and performance att
21、ributes. 3.2 Design, materials and manufacturing processes. Unless otherwise specified, the design, materials and manufacturing process selection is the prerogative of the contractor as long as all articles submitted to the government fully meet the operating, interface, support and ownership, and e
22、nvironment requirements specified. 3.2.1 Materials. Materials shall be uniform and free from imperfections or defects which affect their serviceability. All metallic parts shall be made from corrosion resistant materials or treated/plated with corrosion-resistant materials. Asbestos and cadmium mate
23、rials shall not be used in any form in any part of the filter. No item, part or assembly shall contain radioactive materials in which the specific activity is greater than 0.002 microcuries per gram or activity per item equals or exceeds 0.01 microcuries. 3.2.2 Recycled, recovered, or environmentall
24、y preferable materials. Recycled, recovered, or environmentally preferable materials shall be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs (see 6.5.3). 3.2.3 Desig
25、n and construction. The air filter element, referred to herein as the element, shall be of the dry type for use as the second stage in a heavy duty two-stage air cleaner with a 25,485 liters per minute (L/min) 900 cubic foot per minute (ft3/min) rating, and shall meet the interfaces in accordance wi
26、th Drawing 11669740 (see 4.3.2). 3.2.3.1 Seal. The seal shall be properly seated and bonded in the seal retaining channel. The seal base surface shall be free of any release agent. No separation shall exist between the seal body and the channel, and between channel and end cover. There shall be no e
27、xcessive bonding material buildup between the seal and the top edge of the channel walls (see 4.3.2.1). 3.2.3.1.1 Seal compression. The seal shall be capable of being compressed to the stops 6.35 millimeters (mm) 0.25 inch (in.) over a 152.4 mm (6 in.) section with a force of 289 89 Newton (N) 65 20
28、 pound-force (lbf) (see 4.3.2.1.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62309G 5 3.2.3.1.2 Seal adhesion. The seal shall be capable of withstanding a maximum pull of 876 Newtons per meter (N/m) 5 pound-force per inch (lbf/in.) of
29、length perpendicular to the surface without any separation (see 4.3.2.1.2). 3.2.3.2 Media. The filtering element media shall be securely bonded to the element end-caps. The bonding shall be free of porosity, voids, and pin-hole leak paths (see 4.3.2.2). 3.2.3.2.1 Internal tear strength. The filterin
30、g media shall be capable of withstanding 40 grams (g) 1.4 ounces (oz) minimum internal tear resistance without evidence of physical damage (see 4.3.2.2.1). 3.2.3.2.2 Bursting strength. The filtering media shall withstand differential pressure of 103 kilopascals gage (kPag) 15 pounds per square inch
31、gage (psig) minimum without evidence of tearing (see 4.3.2.2.2 and 6.5.1). 3.2.3.2.3 Tensile breaking strength. The filtering media shall withstand 3.6 kilograms (kg) 8 pounds (lb) minimum in tensile load without evidence of damage (see 4.3.2.2.3). 3.2.3.3 Pin loading. 3.2.3.3.1 End loading. The ele
32、ment shall be capable of withstanding a compressive end load without damage, when a 1,334 13 N (300 3 lbf) static load is applied uniformly over a 127 mm (5 in.) diameter circular area (see 4.3.2.3.1). 3.2.3.3.2 Maximum loading. The element shall be capable of withstanding a compressive, (end to end
33、) load without damage when a 2,669 133 N (600 30 lbf) static load is simultaneously applied to each clamping pin, totaling 5,338 267 N (1,200 60 lbf) (see .3.2.3.2). 3.2.3.3.3 Nominal loading. Each of the two spring-loaded pins shall support a preload of 623 133 N (140 30 lbf) at 138.2 mm (5.44 in.)
34、 from the rear of the pin to the element stops. Compression of the seal, and positioning of the pins 131.1 mm (5.16 in.) from the rear of the pin to the element stops, shall cause the load on each pin to be 1,246 267 N (280 60 lbf) (see 4.3.2.3.3). 3.2.3.4 Element protection. Protective means shall
35、be provided on the inside and outside of the element, to securely attached the frame and bond to the element media. In addition, structural members shall be securely attached to the inside frame of the element. The resulting assembly shall ensure that any flexure of the internal elements are minimiz
36、ed and do not exceed 1/32 in. (see 4.3.2.4). 3.3 Operating requirements. Each filter element shall provide the following functional, operational and performance capabilities. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62309G 6 3.3.1 Init
37、ial air flow pressure drop. The initial air-flow pressure drop of the element shall not exceed 2.24 kPa (9 in. of water) at 100% flow (see 4.3.3.1). 3.3.2 Dust capacity. When operating with a stepped air flow in accordance with table I and fed ISO 5011 coarse test dust using the applicable dust inje
38、ctor as specified in ISO 5011, the filter element service life shall life be a minimum of 80 hours when the air cleaner maximum pressure drop limit reaches a limit of 4.98 kPa (20 in. of water) at 100% flow. There shall be no dust tracking on the downstream side of the filter element and the coarse
39、dust accumulative efficiency shall not be less than 99.9% (see 4.3.3.2). TABLE I. Stepped air flow. Time (minutes) Rated flow (percent) Air-flow (L/min) (ft3/min) Scavenge Air Flow (L/min) (ft3/min) 10 100 25,485 (900) 1980 (70) 10 60 15,291 (540) 3000 (107) 10 20 5,097 (180) 3600 (128) 10 80 20,388
40、 (720) 2580 (92) 10 60 15,291 (540) 3000 (107) 10 40 10,194 (360) 3420 (120) 3.3.3 Dust filtration efficiency. The assembly dust filtration efficiency shall be not less than 99.7% after 60 minutes of operation when fed with fine grade dust in accordance with ISO 5011 (see 4.3.3.3). 3.4 Interface req
41、uirements. 3.4.1 Filter element interface. The filter element interface requirements shall conform to interfaces on Drawing 11669740 to ensure proper interface with the air cleaner assembly (see 4.3.4.1). 3.4.2 Master box assembly gage interface. Unless otherwise specified (se 6.2 and 6.5), the mast
42、er box assembly interface shall conform to the interfaces on Drawing 10959082 (referred to herein as the assembly) that contains filter element interfaces to Drawing 11669740 (see 4.3.4.2). 3.4.3 Weight. The weight of the element shall not exceed 15.4 kg (34 lb) (see 4.3.4.3). 3.4.4 Metals. The use
43、of dissimilar metals in intimate metal to metal contact shall be avoided (see 4.3.4.4). 3.5 Support and ownership requirements. The filter element shall meet the following logistic requirements. 3.5.1 Air cleaning durability. When operated at a dust feed rate of 3.53 0.7 gram per cubic meter (g/m3)
44、(0.1 0.02 g/ft3) of air, and after reaching load capacity (see 6.5.2) and Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62309G 7 subsequently air cleaned three times, the time for the assembly to reach load capacity a fourth time, at a rate
45、 of 0.88 g/m3 (0.025 g/ft3) shall not be decreased by more than 45%. Dust tracking shall not develop on the down-stream side of the filter element during these cycles (see 4.3.5.1). 3.5.2 Washing durability. The assembly shall meet the requirements of 3.3.3 after the filter element reaches load capa
46、city (see 6.5.2), and then washed, cleaned and dried (see 4.3.5.2). 3.5.2.1 Post service air flow pressure drop. After one operation to load capacity (see 6.5.2) in accordance with 3.3.2, followed by a cleaning in accordance with 4.3.5.2.1, the assembly air-flow pressure drop shall not have increase
47、d by more than 0.25 kPa (1 in. of water) above that measured in 3.3.1. 3.5.3 Marking. Identification and marking shall be permanent in accordance with SAE AS478, and shall include as a minimum, the manufacturers identification code (CAGE), contract number, part number, maximum rated air-flow, and mo
48、nth and year of manufacture (see 4.3.5.3 and 6.2). 3.5.4 Workmanship. The element shall be free of cracked end caps, visually apparent surfaces out of alignment or out of contour, and missing portions of material. Sheet metal parts shall be free of blisters, tears, and excessive thinning at drawn se
49、ctions. The element seal shall be properly seated inside the end cap channel with no separation between the seal and channel. There shall be no excessive adhesive adjacent to the bonding surface. The interior shall contain no foreign particles. The media shall contain no tears, rips, or holes (see 4.3.5.4). 3.6 Operating environment requirements. The filter element
