1、MIL-F-24402E(SH)3 April 1990SUPERSEDINGMIL-F-24402D(SH)12 April 1982(See 6.8)MILITARY SPECIFICATIONFILTERS (HYDRAULIC), FILTER ELEMENTS (HIGH EFFICIENCY),AND FILTER DIFFERENTIAL PRESSURE INDICATORS,GENERAL SPECIFICATION FORThis specification is approved for use by the Naval Sea Systems Command,Depar
2、tment of the Navy, and is available for use by all Departments andAgencies of the Department of Defense.1. SCOPE1.1 Scope. This specification covers hydraulic filter housings, filterelements, and associated differential pressure indicators for use in shiphydraulic control systems with an operating p
3、ressure up to 3,000 pounds per squareinch (lb/in2).1.2 Classification. Filter housings, filter elements, and differentialpressure indicators shall be of the envelope sizes specified in the applicablespecification sheet (see 3.1) and shall be designated as shown in the applicablespecification sheets2
4、. APPLICABLE DOCUMENTS2.1 Government documents.2.1.1 Specifications, standards, and handbooks. The followingspecifications, standards, and handbooks form a part of this document to theextent specified herein. Unless otherwise specified, the issues of thesedocuments are those listed in the issue of t
5、he Department of Defense Index ofSpecifications and Standards (DODISS) and supplement thereto, cited in thesolicitation (see 6.2).AMSC N/A FSC 4330DISTRIBUTION STATEMENT A. Approved for public release: distribution is unlimited.Provided by IHSNot for ResaleNo reproduction or networking permitted wit
6、hout license from IHS-,-,-MIL-F-24402E(SH)SPECIFICATIONSFEDERALPPP-F-320 - Fiberboard; Corrugated and Solid, Sheet Stock(Container Grade), and Cut Shapes.MILITARYMIL-V-3MIL-P-116MIL-S-901MS3102MIL-H-5606MIL-L-17331MIL-L-19140MIL-H-19457MIL-H-22072MIL-F-24402/1MIL-F-24402/2MIL-F-24402/3MIL-F-24402/4M
7、IL-F-24402/5MIL-F-27656Valves, Fittings, and Flanges (Except for SystemsIndicated Herein); Packaging of.Preservation, Methods of.Shock Tests, H.I. (High-Impact) ShipboardMachinery, Equipment, and Systems, Requirementsfor.Connector, Receptacle, Electric, Box Mounting,Solder Contacts, AN Type.Hydrauli
8、c Fluid, Petroleum Base: Aircraft,Missile, and Ordnance.Lubricating Oil, Steam Turbine and Gear, ModerateService.Lumber and Plywood, Fire-Retardant Treated.Hydraulic Fluid, Fire-Resistant, Non-Neurotoxic.Hydraulic Fluid, Catapult, NATO Code Number H-579.Filter Housings, Hydraulic Single Element.Filt
9、er Housings, Hydraulic, Duplex.Filter Housings, Hydraulic, Three Elements.Filter Elements Hydraulic. Disposable.Filter Indicators,” Differential Pressure,Hydraulic.Filter Unit, Fluid, Pressure MXU-408/M, Absolute 5Micron, Hydraulic.STANDARDSMILITARYDOD-STD-100 - Engineering Drawing Practices.MIL-STD
10、-167-1 - Mechanical Vibrations of Shipboard Equipment (TypeI - Environmental and Type II - InternallyExcited).MIL-STD-278 - Welding and Casting Standard.MIL-STD-1651 - Insert Arrangements for MIL-C-5015, MIL-C-22992(Classes C, J, and R), and MIL-C-83723 (SeriesII) Electrical Connectors.MIL-STD-2073-
11、1 - DOD Materiel Procedures for Development andApplication of Packaging Requirements.MIL-STD-2073-2 - Packaging Requirement Codes,MIL-STD-2193 - Hydraulic System Components, Ship Metric.(Unless otherwise indicated, copies of federal and military specifications,standards, and handbooks are available
12、from the Naval Publications and FormsCenter, (Attn: NPODS), 5801 Tabor Avenue, Philadelphia, PA 19120-5099.)Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-24402E(SH)2.2 Non-Government publications. The following documents form a part ofthis do
13、cument to the extent specified herein. Unless otherwise specified, theissues of the documents which are DOD adopted are those listed in the issue of theDODISS cited in the solicitation. Unless otherwise specified, the issues ofdocuments not listed in the DODISS are the issues of the documents cited
14、in thesolicitation (see 6.2).AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)Y32.10 - Graphic Symbols for Fluid Power Diagrams. (DoD adopted)(Application for copies should be addressed to the American NationalStandards Institute, 1430 Broadway, New York, NY 10018.)AMERICAN SOCIETY FOR TESTING AND MATERI
15、ALS (ASTM)D 3951 - Standard Practice for Commercial Packaging. (DoD adopted)(Application for copies should be addressed to the American Society forTesting and Materials, 1916 Race Street, Philadelphia, PA 19103.)NATIONAL FLUID POWER ASSOCIATION (NFPA)T2.6.1 - Method for Verifying the Fatigue and Sta
16、tic PressureRatings of the Pressure Containing Envelope of a MetalFluid Power Component.(Application for copies should be addressed to the National Fluid PowerAssociation Inc., 3333 North Mayfair Road Milwaukee. WI 53222.)SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)ARP 901 - Bubble-Point Test Method.(Appli
17、cation for copies should be addressed to the Society of AutomotiveEngineers, 400 Commonwealth Drive, Warrendale, PA 15096.)(Non-government standards and other publications are normally available fromthe organizations that prepare or distribute the documents. These documents alsomay be available in o
18、r through libraries or other information services.)2.3 Order of precedence. In the event of a conflict between the text ofthis document and the references cited herein (except for related specificationsheets), the text of this document takes precedence. Nothing in this document,however, supersedes a
19、pplicable laws and regulations unless a specific exemptionhas been obtained.3. REQUIREMENTS3,1 Specification sheets. The individual item requirements shall be asspecified herein and in accordance with the applicable specification sheet. Inthe event of any conflict between the requirements of this sp
20、ecification and thespecification sheet, the latter shall govern.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-24402E(SH)3.2 Qualification. The filter assemblies, filter elements, and differentialpressure indicators furnished under this specif
21、ication shall be products which areauthorized by the qualifying activity for listing on the applicable qualifiedproducts list at the time of award of contract (see 4.3 and 6.3).3.3 Materials. Materials and coatings shall conform with the materialrequirements specified in MIL-STD-2193. Where threaded
22、 connections are usedbetween the filter bowl and housing, the thread design and materials shall beselected to prevent galling. The bowl and head shall be constructed of dissimilarmaterials which do not gall when in contact or of similar materials which have ahardness difference of not less than 45 B
23、rinell points. Plating or coatingthreads to achieve hardness difference shall not be permitted.3.3.1 Recovered material s. Unless otherwise specified herein, allequipment, material, and articles incorporated in the products covered by thisspecification shall be new and may be fabricated using materi
24、als produced fromrecovered materials to the maximum extent practicable without jeopardizing theintended use. The term “recovered materials” means materials which have beencollected or recovered from solid waste and reprocessed to become a source of rawmaterials, as opposed to virgin raw materials. N
25、one of the above shall beinterpreted to mean that the use of used or rebuilt products is allowed under thisspecification unless otherwise specifically specified.3.3.2 Compatibility. Filter assemblies and differential pressure indicatorsshall be compatible with the fluids identified in the compatibil
26、ity requirementsin MIL-STD-2193.3.3.2.1 Filter element compatibility. Filter element materials shall becompatible with hydraulic fluids containing up to 5 percent water, which shall notresult in degradation of element performance. The hydraulic fluids are identifiedin the compatibility requirements
27、in MIL-STD-2193.3.3.3 Filter element media. If the filter element is of the type whereinresinous or other material is used for elimination of imperfections, not more than2 percent of the filtering area shall be covered by the applied material, Filterelement media having an initial bubble point of le
28、ss than 3 inches of water beforerepair shall be cause for rejection (see 4.7.2.1). After repair the minimumbubble point on production elements shall be 90 percent of the minimum bubblepoint of the qualification test element with the lowest bubble point, but shall benot less than 4.5 inches.3.4 Const
29、ruction. Unless otherwise specified herein, the design, parts, andconstruction of filter housings, filter elements, and differential pressureindicators shall conform to the construction requirements specified herein, inMIL-STD-2193, and in the applicable specification sheets.3.4.1 Filer assemblies.
30、Filter assemblies (filter element and housing)shall be of the full-flow type, with flow through the filter element being fromoutside-in. Filter assemblies shall be constructed so that fluid entering thefilter housing cannot impinge directly upon the filter element medium. The filterassemblies shall
31、be such that the filter elements cannot be installed reversed.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-24402E(SH)The filter assemblies shall permit the removal of the filter element within theelement removal clearance envelope shown on t
32、he applicable specification sheets,without disconnecting fittings or disturbing mountings. Filter assemblies shallmeet all requirements with the maximum element diameter permitted for the sizeelement used in the assembly.3.4.1.1 Mounting. The equipment shall include provisions for solid mountingof t
33、he filter assemblies. The mounting provisions shall meet the shockrequirements of 3.5.1. The mounting shall withstand the wrench loads required formaking tube connections and replacing filter elements.3.4.1.2 Components. The components comprising the filter assemblies such ascheck valves, differenti
34、al pressure indicators, and relief valves, shall permitrepair or replacement of the components without having to replace the filterhousing or manifold. Internal valves shall have replaceable seats.3.4.1.3 Interchangeability. In no case shall parts be physicallyinterchangeable or reversible unless su
35、ch parts are also interchangeable orreversible with regard to function, performance, and strength.3.4.2 Filter housings. The filter housings shall meet the flowratesspecified in the applicable specification sheets. These flowrates are based onthe use of fluid in accordance with MIL-L-17331.3.4.2.1 F
36、ilter housing bowls. Filter housing bowls shall utilize threadedconnections between the filter bowl and housing. The entering ends of the bowland housing threads shall incorporate a blunt start in which the partial thread atthe entering end is removed to prevent crossing of threads during assembly.F
37、ilter housings shall be provided with square wrench flats to facilitate bowlremoval during filter element replacement. The threaded filter bowls shall beprovided with not less than 2-inch wide knurling completely around the bowlcircumference.3.4.2.2 Drain plug. Filter housings shall be equipped with
38、 a drain plug.The positioning of the drain plug shall permit maximum drainage of oil from theassembly during filter element replacement.3.4.2.3 Loads. Filter housings shall withstand the structural loads imposedby the tests (see 4.3). In addition, the filter housing shall be of such strengthand rigi
39、dity as to withstand the wrench loads required for making tube connectionsand replacing filter elements.3.4.3 Filter elements. Filter elements shall be constructed with an outerwrap of metal screen or perforated metal to protect the filter media pack fromdamage during handling.3.4.4 Protective and c
40、ontrol devices.3.4.4.1 Differential pressure indicators. Filter assemblies shall beequipped with differential pressure indicators. The indicators shall conform tothe envelope and male gland dimensions shown on the specification sheet fordifferential pressure indicators and shall be mounted to the fi
41、lter assembly using5Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-24402E(SH)the porting detail shown on figure 1. The filter housing shall permit themounting of any indicator in not less than two of four 90-degree orientations.Three-element f
42、ilter assemblies (see the applicable specification sheet) shallhave an indicator installed which can be rotated 180 degrees to permit viewingfrom either side of the assembly.3.4.4.1.1 Mechanical differential pressure indicators. Mechanicaldifferential pressure indicators shall actuate, by raising a
43、red indicator, at afilter element differential pressure value specified in the applicablespecification sheet. The indicator shall have a surge lockout to preventactuation for not less than 5 seconds for differential pressures equal to or lessthan a value specified in the applicable specification she
44、et. The indicator shallnot inadvertently actuate under the vibration of a 20 gravity shock load. Onceactuated, the red indicator shall be constructed so that it can be manually resetat 3,000 lb/in2 operating pressure without the assistance of any tool.3.4.4.1,2 Electrical differential pressure indic
45、ators. Electricaldifferential pressure indicators shall actuate by raising a red indicator andmaking electrical contacts simultaneously at a filter element differentialpressure value specified in the applicable specification sheet. The electricalconnector shall conform to class, size, insert arrange
46、ment, and style requirementsof MS3102 as identified by part or identifying number (PIN); MS3102R-10SL-3P. Theelectrical rating on the single-pole, double-throw switch shall be 5 amperes at110 volts alternating current (Vat), 28 volts direct current (Vdc) (resistive),and 3 amperes at 100 Vac, 28 Vdc
47、(inductive). The switch shall be constructedwith a removable 2-watt, 6800-ohm resistor installed internally across thenormally open contacts, for possible use in a supervised monitoring system.Electrical connector pins A and B, in accordance with MIL-STD-1651, arrangement 3,shall be connected to the
48、 normally open contacts. The indicator shall have asurge lockout to prevent actuation for not less than 5 seconds for differentialpressure equal to or less than a value specified in the applicable specificationsheet. The indicator shall not inadvertently actuate under the vibration of a 20gravity sh
49、ock load. Once actuated, the red indicator shall be constructed so thatit can be manually reset at 3,000 lb/in2 operating pressure without assistance ofany tool.3.4.4.1.3 Gauge-type differential pressure indicators. Gauge-typedifferential pressure indicators shall have a differential pressure range asspecified in the applicable specification sheet. The indicators shall be markedin 10-lb/in2 graduations with identifying numbers every 20 lb/in2. Gauges shallnot be redlined. Gauges shall with
