1、MIL-F-24402E(SH)AMENDMENT 226 May 1995SUPERSEDINGAMENDMENT 17 July 1992MILITARY SPECIFICATIONFILTER (HYDRAULIC), FILTER ELEMENTS (HIGH EFFICIENCY), ANDFILTER DIFFERENTIAL PRESSURE INDICATORS,GENERAL SPECIFICATION FORThis amendment forms a part of MIL-F-24402E(SH), Dated 3 April 1990, and isapproved
2、for use by the Naval Sea Systems Command, Department of the Navy and isavailable for use by all Department and Agencies of the Department of Defense.PAGE 2Add the following specifications to the Military Specifications Listing:MIL-F-24704 - Flanges, Four Bolt Square, Hydraulic, General Specification
3、 for.MIL-F-24704/4 - Flanges, Four Bolt Square, Blind For Hydraulic Systems.MIL-F-24704/5 - Flanges, Four Bolt, Insert Sleeves For Hydraulic Systems.PAGE 3* Add the following standard to the American Society For Testing And Materials(ASTM) :A 342 - Standard Test Methods for Permeability of Feebly Ma
4、gnetic Materials.PAGE 4* 3.4: Add the following:“ The aluminum parts of the filter elements are exempted from anodizingrequirements. Plated socket head cap screws shall not be utilized”.AMSC FSC 4330DISTRIBUTION STATEMENT A. Approved for public release: distribution is unlimited.1 of 4Provided by IH
5、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-24402E(SH)AMENDMENT 2PAGE 4* Add the following new paragraph:“3.3.4 Filter element magnetic permeability. The size B and size C filterelements shall have a relative magnetic permeability of less than 2.0 when t
6、estedin accordance with ASTM-A432.“PAGE 53.4.2.1, Line 5: Delete “ housings “ and substitute “housing bowls“.PAGE 93.6.3: Delete item “(d)“ in its entirety.PAGE 11Table I:(a). Delete footnote from the check valve leakage test.* (b). Add the following test after “Examination“ under “Element no. 1“:PA
7、GE 15Table II, Sampling: Delete “Pressure point “ and substitute “Clean elementpressure drop 3J.Table II, Footnote : Delete and substitutespecified in 4.5.1 do not apply. For leakagefluid, an increased leakage is permitted onlyqualifying activity.“Fluid, temperature, and viscositytests with other th
8、an MIL-L-17331when specifically approved by the4.4.2 Delete “and 4.4.2.2“ and substitute “through 4.4.2.3“.4.4.2.1 and 4.4.2.2: Delete and add the following paragraphs.2 of 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-24402E(SH)AMENDMENT 2“
9、4.4.2.1 Sampling for examination and tests. For the purpose of sampling,filter elements shall be grouped into lots not exceeding 501 pieces. A lot isdefined as elements produced at one facility, fabricated by the same process,which are of same material, size, type and part number.“4.4.2.2 Examinatio
10、n and bubble point test. As a minimum the manufacturershall select a sample quantity from each lot of filter elements in accordancewith table III and inspect them in accordance with table II. If one or moredefectes are found in any sample, the entire lot shall be rejected. Themanufacturer has the op
11、tion of screening 1002 of the rejected lot for thedefective characteristic(s) or providing a new lot which shall be inspected inaccordance with the sampling plan contained herein.“4.4.2.3 Clean element pressure drop test. As a minimum the manufacturer shallselect a sample quantity from each lot of f
12、ilter elements in accordance withtable III and inspect them in accordance with table II. Failure of the testshall be cause for rejection of the element lot.“PAGE 16Table III: Delete and substitute:“TABLE III. Sampling plan for filter elements.4.7.2.5: Add the following:“An acceptable pressure build-
13、up and collapse test setup, with cleanup deviceinstalled, is shown on figure 3.“4.7.2.5.1: Delete and substitute:“4.7.2.5.1 Clean element pressure drop and Pressure buildup.(a) Clean element pressure drop. With the full flow dummy element installedin a test housing, the housing shall be installed in
14、 the forward flow direction.A test flow (see table I of MIL-F-24402/4) shall be established at thetemperature determined to obtain 100 cst oil viscosity, and the differentialpressure shall be recorded. This is the tare value. The dummy element shall beremoved and replaced with the test element. A te
15、st flow (see table I of MIL-F-244402/4) shall be established at the temperature used for the tare value. Therecorded differential pressure is gross value. Difference between the tare andgross value is the pressure drop of the clean element. The clean elementpressure drop shall be no greater than the
16、 value specified in the applicablespecification sheet.3 of 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-24402E(SH)AMENDMENT 2(b) Pressure buildup. With the element in a test housing,cleaner (A-C) test dust shall be added immediately upstrea
17、m ofstandardized airthe filter elementat 4-minute interval. The amount of dust added at each interval shall be asspecified in the specification sheet for filter elements. The temperature of thetest fluid shall be maintained as specified in 4.5.1. Pressure differential, flowrate, and temperature shal
18、l be recorded 2 minutes after each dust addition. Thepressure differential at test flow (see table I of MIL-F-24402/4) shall be notgreater than the value specified in the applicable specification sheet after thespecified amount of dust has been added. Additional dust shall be added untileither a dif
19、ferential pressure of 150 lb/in2 is obtained across the element attest flow or until twice the minimum weight of test dust has been added. Fluidflow shall not be interrupted during pressure build-up testing. Add intervals,amount of dust added, and pressure shall be included in the qualification test
20、report. Curve showing the differential pressure across the element versus weightadded in gram of A-C fine test dust shall be included in the qualification testreport. Cleanup filters are allowed in the test stand during pressure build-uptesting at the contracteds facilities. When testing is conducte
21、d by theGovernment, cleanup element efficiency shall be equal to or better than thatrequired for MIL-F-27656 elements.“PAGE 25* Add the following new paragraph:“4.7.2.9 Magnetic permeability. The filter element shall be subjected to amagnetic permeability test as specified in ASTM-A432. Nonconforman
22、ce to therequirement of 3.3.4 shall constitute failure of this test.“PAGE 265.1.2: Delete in its entirety.PAGE 275.2.2.1: At the end of sentence, Add “of MIL-P-116“NOTE: The margins of this amendment are marked with an asterisk or verticallines to indicate where changes (additions, modifications, co
23、rrections,deletions) from the previous amendment were made. This was done as a convenienceonly and Government assumes no liability whatsoever for any inaccuracies inthese notations. Bidders and contractors are cautioned to evaluate therequirements of this document based on the entire content irrespective of themarginal notations and relationship to the last previous amendment.Preparing activityNAVY - SH(Project 4330-N002)4 of 4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
