1、MIL-F-51208(MU) 28 Auaust 1964 MILITARY SPEC1 FI CATI ON FILTER ELEMENT AND RING ASSEMBLY 1, SCOPE 1 , 1 This specification covers a filter element and ring assembly for assembly into canisters, 2, APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on the date-of invitation for
2、bids or request for proposal form a part of this specification to the extent specified herein: . S PECIF ICATI ONS FEDERAL PPP- B-621 - PPP-B-636 - PPP-F-320 - PPP-T-76 - Boxes, Wood, Nailed and Locked-Corner, Box, Fiberboard, . Fiberboard; Sheet, Stock and Cut Shapes, Tape, Pressure-Sensitive Adhes
3、ive Paper, (For Carton Sealing). FSC 4240 THIS DOCUMENT CONTAINS PAGES. # Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS Ml LI TARY MIL-STD-105 - Smpling Procedures and Tables for Inspection by MIL-STD-129 .- Marking for Shipment and Stora
4、ge. Attributes. DRAWINGS EDGEWOOD ARSENAL . D5-3-892 - Filier flement and Ring Assembly, (Copies of specifications, standards, drawings, and pub1 ications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the cont
5、ractling Qfficer,) - 2,2 Other publications. The following document forms a part of this specification to the extent specified herein, Unless otherwise indicated, the issue in effect on date of invitation for bicfs,or request for proposal shall apply. UNIFORM CLASSIFICATI ON COMMITTEE Uniform Freigh
6、t Classification Ratings, Rules and Regulations, (Application for. copies04 these freight classification rules should be addressed to the Uniform Classification Cornmik, 20.2 Union Station, Chicago 6, Illinois.) 3, REQULREMENTS . 3,l Materials and compnents, 3.1 e 1 Materials, All materials cited en
7、 Drawing D5-3-892 or on subsidiary drawings s-orm fa the specifications listed thereon or the specific characteristics set forth on the drawings. CI .E Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 MIL-F-51208 42 9999906 0234693 O I. MI L-F-51208
8、(MU) 3.1.2 Com nents. All components of the filter element and ring assembly shall conform + to t e specifications and the drawings listed on Drawing D5-3-892 and subsidiary drawi ngs, 3,2 Manufacture and assembly. The filter element and ring assembly,shall be manufactured and assembled as specified
9、 on Drawing 05-3-892-1 or D5-3-892-2 as specified in the contract or order (see 6,). 3.3 Air resistance. The air resistance of the filter element and ring assembly shall not exceed 10 millimeters of water at an airflow rate of 32 liters per minute when tested as specified in 4.6,1, 3,4 Dioctyl phtha
10、late (DOP) penetration. The filfer element and ring . assembly shall not allow more than 0,015 percent DOP penetration at a flow rate of 32 liters per minute when tested as specified in 4,6,2, - 3.5 Adhesion. The filter material shall be thoroughly and completely bonded with the paper tab at all poi
11、nts of contact and with itself at the center pleat, The filter material shall tear within itself rather than pulling loose, and filter material fibers shall remain securely attached to the adhesive when tested as specified in 4,6.3, 3,6 Preproduction. When specified in the contract or order, a prepr
12、oduc- tion sample shall be produced for examination and test. The preproduction sample shall be manufactured using the same materials, methods and equipment as will be used during regular production (see 6.2), 3,7 Workmanship. The filter element and ring assembly shall be free from foreign matter, s
13、uch as dirt, oily or viscous material, and free of damage, such as tears or punctures in the element or burrs, dents, or deformations in the ring assembly. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c 4, QUALITY ASSURANCE PROVISIONS 4.1 Respon
14、sibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory acceptabl
15、e to the Government, The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Special provisions. 4.2.1 Alternative inspection, The supplier m
16、ay utilize any alternative inspection procedure which will provide equal or better assurance of quality by submitting a written proposal with justification and obtaining written approvd from the Government prior to instituting the procedure, In case of dispute, the procedures of this specification w
17、ill govern. - 4.2,2 Objective evidence. The suppl er shall provide obiective evidence acceptable to the contracting officer that the requirements of 3.1 and section - 5 for which specific inspection has not been provided in this specification have been satisfied, 4,2,3 Substation inspection, If the
18、supplier elects to establish inspection substations for the purpose of conducting inspection for certain listed defects, the Acceptable Quality Levels (AQls) for each inspection substation shall be equal to the AQL wbich is the next numerically lower value than the AQL specified for the total listed
19、 defects. The requirements of MIL-STD-105 are applicable to each substation and to the end item. 4.3 Lotting. A lot shall consist of the filter elements and ring assemblies of one type produced by one manufacturer, at one plant, from the same materials, under essentially the same manufacturing condi
20、tions, c Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-F-5L208 42 m 977990b 0234673 Li m I 4,4 Sampl ing . 4,4,1 For examinati and n conducted in accordance wm destructive tests, Sampling shall be - .-STD-105, Samples for air resistance and D
21、OP penetration shall be selected from items unit packaged. 4,4,2 For destructive tests, Sampling shall be conducted in accordance with MIL-STD-105, level S-3, 4,5 Inspection provisions. 4.5.1 Examination and nondestructive tests, Sample filter element and ring assemblies shall be examined and tested
22、 in accordance with the classifica- tion of defects and MIL-STD-105, 4.5.2 For destructive tests, Sample filter element and ring assemblies shall be tested in accordance with 4.6.3. The acceptance number iszero, 4,5,3 Classification of defects. I*. 4,5.3,1 Filter element and ring assembly (Dwg D5-3-
23、892, Categories Critical: Maior: 101 102 1 03 104 i 05 Defects Acceptance standards None defined AQL 1.0 percent defective Component incorrectly assembl ed Component missing Overal I diameter incorrect Overall height incorrect Workmanship (3-7) Major A: AQL 0,25 percent defective 150 Air resistance
24、151 DOP penetration AQL ,5 percent defective -_ Minor: 20 1 - Height outside fold incorrect 4.6, 1 4.6.2 . 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-F-SL208 42 7777906 0234674 6 M MI L-F-5 1208tMU) 4.6 Tests, 4.6,l Air resistance, The a
25、irflow resistance shall be determined using Indicator, Resistance, Q112. 4.6,2 DOP penetration, The DOP penetration shall be determined using Penetrometer, Filter Testing, DOP, Q127, 4.6.3 Adhesion. Tear the assembly apart by applying tension at all cemented joints and examine for compliance with 3,
26、s. 5, PREPARATION FOR DELIVERY 5,l Packaging levels shall be as specified (see 6,2), 5,1,1 Level Bo 5,1,101 Unit packaging. The filter element and ring assembly shall be individually wrapped in tissue or glassine paper, 5.1 1,2 Intermediate packaging. Five hundred filter element and ring assemblies
27、shall be packaged in a type I, class 2, grade 5, style RSC fiberboard box conforming to PPP-B-636. The assemblies shall be arranged in 20 layers, each containing 5 rows of 5 filter element and ringassemblies. The assemblies shal I be separated from one another by fiberboard interlocking partitions a
28、nd fiberboard pads between layers using the same type of fiberboard as the box or using fiberboard conforming to type CF, domestic class, variety SW of PPP-F-320, Closure and reinforcement shall be as specified for interior boxes of the box specification, Box corners; seams, and manufacturers joint
29、shall be taped as specified in the box specification, except that pressure sensitive tape conforming to PPP-T-76 shall be used, The contents of the package shall be snug enough to prevent free movFment of the filter element and ring assembl es without applying pressure which might defomi them, -5,1,
30、2 Level C. The filter element and ring assemblies shall be packaged as specified in 5.1 , 1 except the fiberboard box shall be type I , class 1 , style RSC box conforming to PPP-0-636. 6 CI Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-5L208
31、42 W 9999906 023i-1695 8 m I MI L-F-5 1208(MU) 5.2 Packing. Levels shall be as specified (see 602). 5,2,1 Level B. in 5,l shall be packed in a style 4 or 4-1/2 nailed wood box conforming to class 1 of PPP-B-621, Gross weight of the box shall not exceed the weight limitations of the box specification
32、, Filter element and ring assemblies packaged as specified 5.2.2 Level Co Filter element and ring assemblies packaged as.specified in 5,l shall be packed to insure carrier acceptance and safe delivery at first destination for immediate use. Containers used shal I comply with Uniform Freight Classifi
33、cation rules or regulations of other carriers applicable to the mode of transportation. 5.3 Marking. Unless otherwise specified in. the contract or order, unif and intermediate packages and shipping containers shall be marked in accord- ance with MIL-STD-129, - 6, NOTES 6,l Intended use. The filter
34、element and ring assembly covered in this specification is a component of the M14 particulate canister, 6.2 Ordering data, . Procurement documents should specify the following: (a) Title, number, and date of this specification. (b) Type of filter material to be used, (c) Level of packaging and packi
35、ng required, (d) Whether the 05-3-892-1 or D5-3-892-2 assembly is required. (e) Whether a preproduction sample is required, (1) Quantity required, (2) Time allowed for supplier submission of samples for Government (3) Name and address of test facility and shipping instructions (4) Time required for
36、the Government to notify the supplier test and evaluation after award of contract. when testing is performed by the Government, whether or not to proceed with production. 6 7 .- . . . . . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-SL20 4
37、2 = 9797906 023469b T W I MI L-F-5 1 208( MU) 6,3 Adhesive. An adhesive suitable for cementing the filter has been prepared according to the following formulation: : Ingredients Parts by weight I I i 1 I t i 810 20 25 20 i i ! 50 i Latex, &percent, centrifuged Ten percent solution NaOH Ten percent s
38、olution Al kanol (Dupont) i Forty percent solution formaldehyde i *Vulcanizing Dispersion C95 (Firestone Rubber & Latex Com) (R, T. Vanderbilt Com, Inca) *Added just prior to use of cement. - 6.4 Number of pleats. When relatively thick filter material is used in production of the filter element, it
39、is generally advantageous to use o lower number of pleats in order to meet the air resistance requirement, When relatively thin material is used, it is generally advantageous to use a higher number of pleats in order to meet the DOP penetration requirement, . Custodian: Preparing activity: Amy - MU Army - MU Project No, 4240-AI96 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
