1、7 June 1971 SUPERSEDING g. 3 -g -. . MIL-F-27707G (USAF) . -p .u-.- . .-* 21 March 1969 .- MILITARY SPEC IFICATION FILTER ELEMENT, FLUb PRESSURE FFU-5/E . 1. SCOPE- 1.1 designated FFU-S/E. This- specification covers one type of fluid pressure filter element, - 2, APPLICABLE -DOCUMENTS 2.1 bids or re
2、quest for proposal, form a part of this specification to the extenir specif ied herein: The -following documents, of,the issue in effect on date of invitation for . SPECIFICATIONS . .I = Federal -_ PPP-B-566 - PPP-B-576 PPP-B-585 . PPP-B- 5 91-. PPP-B-636 PPP-B - 640. PPP-B-676, PPP-T-60 Military MI
3、L-P-116 MIL-G-5572 MIL-T-5624 MIL-F-8 901 MIL-P-19834 Box, Folding, Paperboard Box, Wood, Cleated, Veneer, Paper Overlaid Box, Wood, Wirebound Box, Fiberboard, Wood-Cleated Box, Fiberboard Box, Fiberboard, Corrugated, Triple-Wall Box, Setup - Tape, Pressure-Sensitive Adhesive, Waterproof, for Packag
4、ing Preservation, Methods of Gasoline, Aviation, Grades 80/87, 100/130, 115/145 Turbine Fuel, Aviation, Grades JP-4 and JP-5 Filter-Separators, Aviation and Motor Fuel, Ground and Shipboard Use, General Requirements and Test Procedures for Plates, Identification, Metal Foil, Adhesive Backed FSC 4330
5、 J Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Xilitary MIL-STD- 105 MIL- STD- 12 9 MIL-STD-130 MJL-STD-831 Test Reports, Preparation of Sampling Procedures and Tableb for Inspection by Attributes Marking for Shipment and Storage Identification M
6、arking of US Miiitary Property (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtaine 1 from the procuring activity or as directed by the contracting officer.) 2.2 Other lpublications. The following d
7、ocuments form a part of this speci- fication to the extent specified herein. Unless otherwise indicated, the iscuc in effect on date of invitation for bids.or request for proposal shall apply. I American Society for Testing and Materials D 256 Standard Methods of Test for Impact Resistance of Plasti
8、cs D 638 D 790 (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street , Phi Ladelphia, Pennsylvania 19103, j and Electrical Insulating Materials Method of Test for ?ensile Properties of Plastics Standard Method of Test for Flexural Properties
9、of Plastics 3. REQUIREMENTS 3.1 Preproduction. This specification makes provisions for preproduction testing. 3.2 General specification. The requirements of MIL-F-8901 apply as require- ments of this specification with the exceptions and additions specified hereiil. When the two specifications confl
10、ict, this specification shall govern. 3.3 Materials 3.3.1 Metallic parts. fabricated from an aluminum alloy suitable for the application. 3.3.2 Fungusproof materials. be used to the greatest extent practicable. Where materials that are nutrients for fungi must be used, such materials shall be treate
11、d with a fungicidal ager:t. All metallic parts of the fi1te.r element shall te Materials that are not nutrients for fungi sha: 1 3.3.3 Petroleum products. The materials used in the construction of the filter element shall neither affect nor be affected by petroleum products. 2 Provided by IHSNot for
12、 ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3.4 Plastic parts. If used in tlie construction of the elements, molded plastic parts shall have the following physical properties: a. Tensile strength minimum 4,500 psi b. Flexural strength minimum . 7,500 psi c. IZOD imp
13、act minimum 1.5 pounds per inch of notch. 3.4 Dzsign and construction. structed that no parts will work loose in service. It shall be built to withsiand the stresses, jars, vibrations, and other conditions incident to shipping, st,rage, installation, and flight line service, The filter element shall
14、 be so designed and COI- 3.4.1 Functional design. The filter element shall be designed for use in th Bowser, incorporated, Bowser-Briggs Filtration Division series 842D filter- separators. The element shall be as shown on figure 1. The element shall be provided with an aluminum-alloy center tube. Th
15、e element base shall be providl.d with aluminum alloy threads of the size shown on figure 1. If the threaded section is a metallic insert, it shall have a minimum outside diameter of 2-1/4 inches. The threads shall be coated with a material to prevent the element from loosening in service aiter inst
16、allation. The coating shall not prevent the element from being removed. A 3/8-16 TJNC-2B stainless-steel nut, flat stainless-steel washer, and Buna N gasket of suitable size shall be provided to attach the canister to the element and prevent leakage around the stud. . 3.4.1.1 Compatible fuels. The f
17、ilter element shall be so designed that it can be used with fuels confqrming to MIL-G-5572 and MIL-T-5624. 3.4.1.2 Gasket. have a l-1/2-inch inside diameter by 2-inch outside diameter and shall be 1/8 inch thick. The material for the gasket shall be Buna N or other material compatible with fuels con
18、forming to MIL-T-5624. A gasket shall be furnished in each element. The gasket sha 1 3.4.2 Separator canister assembly. When specified (see 6.2), a separator canister shall be furnished with each element. The canister shall be a semipermanent separator element normally not needing replacement, and m
19、ade entirely from metallic parts except that the end cap may be made of polyester resin as Specified herein, and adhesives may be used, if required. It shall be of rigid construction and shall be designed to withstand damage during normal handling and installation. The canister dimensions shall be a
20、s shown on figure 2. The canister shall be constructed of two concentric layers of perforated meta; and wire mesh. The outer layer shall be a covering made from aluminum alloy metal having a minimum thickness of 14 gage, The perforations shall be 3/16-inch-diameter holes on 5/16-inch centers minimum
21、 or 1/4-inch-diameter holes 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - - .- -_ - - MIL-F-27707H 43 m 7777706 0276I08 I m :IL- I 707 ;Skl;) 34 CUTSIDE DIA I- 25 MIN EFFECTIVE MEDIA LENGTH ALUM INUM ALLOY CENTER TUBE 251 1 PIMENSIONS IN INCHE
22、S UNLESS OTHERWISE SPECIFIED, TOLERANCE i 1/16 IN ALUM. ALLOY FIGURE 1. Element J I y *GASKET 4 _.c . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I- 5 k O U (d k (d a QI m N Provided by IHSNot for ResaleNo reproduction or networking permitted wit
23、hout license from IHS-,-,-:.iIL-F-.r 707H CijSAF) on 9/lh-inch centers maximum. The inner layer of material shall be a hydro- phobic medium of 100- or 200-mesh monel-wire screen, 0.0021 inch in diaineter, coated on both sides with teflon. The canister shall have a hole in the top section for fasteni
24、ng to the element shown on figure 1. The canister shall be provided with a centering and securing device located in the bottom section tO prevent movement and end play during service. The securing device shall in no way cause damage to the element during installation or operation. 3.5 Performance. I
25、ncorporated, Bowser-Briggs Filtration Division model 842D-600 filter separator, they shall be capable of meeting the performance requirements of MIL-F-8901 at a flow rate of 600 gpm. 3.6 each filter element and each separator canister in accordance with MIL-STD-133. If the item is marked on any seal
26、ing surface, the markings shall not affect the sealing of-the element. When 24 elements and canisters are installed in a Bowser, Identification of product. The following information shall be marked on Manufacturers Dart No. - Manufacturers name or trademark Date of manufacture 3.6.1 Manufacturers pa
27、rt number. The manufacturers part number and drawing number shall be the same. 3.6.2 Nameplate. A nameplate fabricated from materials as specified in MIL-P-19834, type I, shall be supplied one per each 12 elements shipped. The nameplate is intended to be attached by Government personnel to the press
28、ure vessel to facilitate maintenance of the fueling system. Attachment instructions shall be furnished, attached to the plate. The nameplate shall conform to figure 3. 3.7 Workmanship. The filter element, including all parts, shall be constructed and finished in a thoroughly workmanlike manner. Part
29、icular attention shall bn? given to neatness and thoroughness of marking of parts and assemblies and freedom of parts from burrs and sharp edges. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsib
30、le for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government.
31、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. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
32、om IHS-,-,-I Y T 5 1 MIL-F-2 7707H (USAF) _. .- . . . . .- . -6 . t -. : . I 4 - FILTER-SEPARATOR ELEMENT 6ATA -ELEMENTS - . . -. PART NR* FSN * 0.0. 3.$ INCHES LENGTA IN INCH ES. 1- CONTRACT 1! 8 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- 1.
33、2 l2st condition: During all ap;)licable full-scale testing, 24 fiiter slements ana 24 separator canisters shall be mounted in a Bowser, Incorporat- j, Bowser-Briggs Filtration Division model 842D-600 filter separator, 4.3 Preproduction testing (see 6.2) 4.3.1 Test samples. Unless otherwise specifie
34、d (see 6.2), the preproductior test samples shall consist of 100 elements and 24 separator canisters repre- sentative of a production lot (see 6.3.1). The samples shall be identified with the manufacturers part number and such other information as required by the procuring activity. Samples shall be
35、 prepared as follows: 4.3.1.1 Data to accompany test samples. be accsmpanied by the following data: a. iristal L and operate the equipment The preproduction test samples shall Brief operating and installation data to enable test personnel to correcLy b. Ensineeriag data in the forni of assembly draw
36、ings (two sets). 4.3.1.1 Test sample and data for procuring activity. at a site other than the laboratory of the procuring activity, the following shall be furnished that activity: a. Three copies of a test report in accordance with MIL-STD-831. In addition to results, the report shall contain compl
37、ete records of the tests, including data sheets, performance curves, chronological test records, photographs, sample calculations, test procedures, and a description of the test apparatus. b. which was subjected to the preproduction tests When tests are conducted . t. A sample element and separator
38、canister removed from the filter-separator c. Color photographs of the sample element d. A new filter element e. A new separator canister (if applicable). - 4.3.2 specified herein and in PIIL-F-8901, except as follows: Preproduction tests. The preproduction tests shall consist of all tests 4.3.2.1 S
39、eparation tests. capacity and at 10 percent by volume are not applicable. The separation tests shall be performed at 600 gpm. Water separation tests at 115 percdnt of rated 8 - . - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i$- = -. - ,- flIL-F-
40、27707H Li3 W 7777906 0276333 5 W MIL - i- 2 7 7 I 7 II (USAii 1 f.3.2.2 Inhibited :fue1 test, During the inhibited fuel test, a single-pass transfer system is required. Single element tests devised to represent full scale testing shall consist of the element shown on figure 1 installed in a canister
41、 as shown on figure 2. Single element testing shall be performed at a flow rate not less than 25 gpm. 4.3.2.3 Coalescer test. !IL-F-8901 entitled Coalescer Element. The filter element shall be subjected to the test of 3-3.2.4 Flow rate. During the Ftill-scale test conditions, the flow rate capacity
42、for the filter element shall be 600 gpm. A.3.2.5 Disassembly inspection. Upon completion of the Life test specified in PIIL-F-8901 , the filter-separator housing shall be disassembled and inspect .ci to determine the condition of the filter elements. Defects in the filter e1ern:nt such as swelling o
43、f the element, damaged elements, damaged gaskets, et cetera, shall be recorded. Excessive swelling of or damage to the element or other parts shall be cause for rejection. 4.3.2.6 Plastic material test. Sections of plastic material used in the construction of end caps and elements or especially prep
44、ared test specimens shall be tested as follows to verify plastic material compliance. This test data developed shall be included in the test report: a. Tensile strength - ASTM D 638, type I b. c. IZOD impact strength (notched) - ASTM D 256, method A; 4.4 Acceptance tests, Flexural strength - ASTM D
45、790 The acceptance tests shall consist of the following: a. Individual tests See 4.4.1 b. Sampling test . See 4.4.2. 4.4.1 Individual tests 4.4.1.1 Examination of product. Each element and canister shall be examined as required by the Examination of product paragraph of MIL-F-8901, and to determine
46、that it conforms to the elements and canisters used in the prepro- duction tests, 4.4.1.2 Separator canister inspection, Each separator canister shall be subjected to an inspection to determine if all joints are properly sealed and the wire mesh is properly attached to insure integrity. The canister
47、 shall be . 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-JIIL-F- 177072 (USAF) mountEd in a fixture having the capability of rotating the canister 360 degrc.es in a level plane. At least 1/2 inch of kater shall be placed inside the canister. The
48、 canister shall be rotated 360 degrees and the element inspected for leakage. If leaks occur, it shall indicate defects in the hydrophobic medium (teflon screen). 4.4.2 Sampling plan and test. Samples of the filter element shall be selected at random from each lot in accordance with MIL-STD-105 and
49、subjected to the test specified in 4.3.2.3. An AQL of 1.5 percent defective shall be established. The inspection level shall be level I. This test shall be considered as being destructive. 4.5 Inspection of preparation for delivery, Preservation, packaging, packing, and marking shall be inspected to determine. conformance to the requirements of section 5 herein. 5. PRE
