1、Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact
2、information 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 4810 METRIC MIL-DTL-24694A(SH) 4 October 2011 SUPERSEDING MIL-V-24694(SH) 28 October 1987 DETAIL SPECIFICATION VALVE, HYDRAULIC RELIEF,
3、 1.5 - 35 BARS (22 - 500 POUNDS PER SQUARE INCH) CARTRIDGE TYPE, GENERAL SPECIFICATION FOR (METRIC) This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Sco
4、pe1.2 . This specification covers the requirements for cartridge-type relief valves for use in hydraulic systems with a maximum operating pressure of 35 bars 500 pounds per square inch (lb/in). Classification2. APPLICABLE DOCUMENTS . Cartridge-type relief valves are furnished in the sizes, adjustmen
5、t type, and pressure settings (classes) listed in the applicable specification sheet. 2.1 General2.2 . The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended
6、 for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. Governmen
7、t documents2.2.1 . Specifications, standards, and handbooksFEDERAL SPECIFICATIONS . The following specifications, 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 con
8、tract. QQ-N-281 - Nickel-Copper Alloy Bar, Rod, Plate, Sheet, Strip, Wire, Forgings, and Structural and Special Shaped Sections DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-S-901 - Shock Tests, H.I. (High-Impact); Shipboard Machinery, Equipment and Systems, Requirements for MIL-PRF-6083 - Hydraulic Flui
9、d, Petroleum Base, For Preservation and Operation MIL-PRF-17331 - Lubricating Oil, Steam Turbine and Gear, Moderate Service MIL-PRF-17672 - Hydraulic Fluid, Petroleum, Inhibited Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24694A(SH) 2 MIL
10、-H-19457 - Hydraulic Fluid, Fire Resistant, Non-Neurotoxic MIL-H-22072 - Hydraulic Fluid, Catapult, NATO Code Number H-579 MIL-V-24694/l - Valve, Hydraulic Relief, 1.5 - 35 Bar, 150 LPM Cartridge Type (Metric) MIL-V-24694/2 - Valve, Hydraulic Relief, 1.5 - 35 Bar, 10 LPM Cartridge Type (Metric) MIL-
11、PRF-83282 - Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbon Base, Metric, NATO Code Number H-537 (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch/ or https:/assist.daps.dla.mil.) 2.3 Non-Government publicationsAEROSPACE INDUSTRIES ASSOCIATION (AIA) . T
12、he following documents 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. NASM20995 - Wire, Safety or Lock NASM33540 - Safety Wiring, Safety Cabling, Cotter Pinning, General Practices
13、 for (Copies of these documents are available from Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700, Arlington, VA 22209-3901 or online at www.aia-aerospace.org.) AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) INTERNATIONAL ASME B46.1 - Surface Texture Surface Roughness, Waviness
14、 and Lay (DoD adopted) (Copies of this document are available from the ASME International, 2 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900 or online at http:/www.asme.org/.) ASTM INTERNATIONAL ASTM A582 - Standard Specification for Free-Machining Stainless and Heat-Resisting Steel Bars, Hot-Rol
15、led or Cold-Finished ASTM B211 - Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire ASTM B221 - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes (Copies of these documents are available from ASTM International, 100 Barr Harb
16、or Dr., P.O. Box C700, West Conshohocken, PA 19428-2959 or online at www.astm.org.) SAE INTERNATIONAL SAE-AMS5610 - Steel, Corrosion and Heat-Resistant, Bars, and Forgings 12.5Cr-Low Carbon (SAE51416Se, 51416Se) Free-Machining-UNS S41600 and S41623 SAE-AMS-QQ-A-763 - Steel Bars, Wire, Shapes, And Fo
17、rgings; Corrosion Resistant SAE-AS3209 - Packing, Preformed-AMS 7276, O-Ring SAE-AS4395 - Fitting End, Flared, Tube Connection (Copies of these documents are available from SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or online at www.sae.org.) Provided by IHSNot for Res
18、aleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24694A(SH) 3 2.4 Order of precedence3. REQUIREMENTS . Unless otherwise noted 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 spe
19、cification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3.1 Specification sheets3.2 . The individual item requirements shall be as specified herein and in accordance w
20、ith the applicable specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. Qualification4.2. Valves furnished under this specification shall be products that are authorized by the qualifying activity for l
21、isting on the applicable qualified products list before contract award (see and 6.3). 3.3 Materials3.3.1 . Materials shall be limited to those specified herein and on applicable specification sheets. Metals shall be compatible with the fluid, temperature, service, and performance requirements specif
22、ied herein. Recycled, recovered, or environmentally preferable materials3.3.2 . Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economica
23、lly advantageous life cycle costs. Prohibited and restricted use materials3.3.2.1 . Prohibited materialsa. Toxic materials . The following materials shall not be used: b. Zinc or zinc plated materials (see 3.3.4.1) c. Mercury d. Magnesium or magnesium base alloys e. Radioactive materials f. Asbestos
24、 g. Cadmium (see 3.3.4.1) 3.3.2.2 Restricted use material3.3.3 . Beryllium is acceptable as a small percentage alloying material in parts that are not subjected to welding. Metal alloysa. Aluminum alloy: Alloy 6061- Tempers T6, T651, or T6511 in accordance with ASTM B211 or ASTM B221, as applicable.
25、 . Unless otherwise approved by the qualifying activity, alloys for use in pressure-containing parts of valves shall be limited to the following: b. Nickel-copper alloy: QQ-N-281, Class A. c. Corrosion Resistant (CRES): Class 302, 304, 304L, 316L, or 440C in accordance with SAE-AMS-QQ-A-763, or Type
26、 303 in accordance with ASTM A582, or Type 1 or 2 in accordance with SAE-AMS5610. 3.3.4 Compatibility3.3.4.1 . The valve shall be constructed of materials which are compatible with fluids as specified in MIL-PRF-83282, MIL-H-19457, MIL-PRF-6083, MIL-H-22072, MIL-PRF-17331, and MIL-PRF-17672. Cadmium
27、 and zinc plating3.4 . Cadmium and zinc plating shall not be used for internal parts or on internal surfaces in contact with hydraulic fluid. This restriction does not prohibit the use of zinc or cadmium-plated parts such as nuts, bolts, and screws in locations that are external to the system where
28、there is no danger of fluid contamination. Construction3.4.1 . Cartridge-type relief valve construction shall be as specified herein and on the applicable specification sheet. Overall dimensions shall be as specified on the applicable specification sheet. Preformed packing (o-rings). O-rings shall b
29、e fluorocarbon rubber in accordance with SAE-AS3209. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24694A(SH) 4 3.4.2 Special tools3.1. Valves shall be adjustable throughout the pressure range without the use of special tools. The adjustmen
30、t type, either external or internal, shall be as identified in the applicable specification sheet (see ). Special tools are those tools not listed in the Federal Supply Catalog, copies of which may be consulted in the Office of the Defense Contract Administration Services Management Area (DCASMA). 3
31、.4.3 Safety3.5 . Hand-adjustable threaded parts subject to tampering shall be securely locked by safety wiring or self-locking nuts. Safety wire shall be applied in accordance with NASM33540 and shall conform to NASM20995. Star washers, lock washers, and jam nuts shall not be used as locking devices
32、. Internal fasteners shall have features which prevent them from coming loose and interfering with system operation. Performance 3.5.1. Valves shall perform as specified in through 3.5.10. 3.5.1 Operating pressure3.1. The valve shall meet the requirements specified herein at operating pressures spec
33、ified in the applicable specification sheet (see ) and specification part number (see 6.2). 3.5.2 Rated flow. Rated flow shall be in accordance with the values shown on the applicable specification sheet and shall occur at a differential pressure not greater than that shown on figure 1 for any nomin
34、al set pressure. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24694A(SH) 5 NOTE: 1. Select differential pressure from the nominal set pressure curve, draw line vertically to obtain the differential pressure at maximum rated flow or at mini
35、mum reseat condition. FIGURE 1. Low pressure hydraulic relief valve performance. 3.5.3 Proof pressure4.6.2. The valve shall withstand a proof pressure of 69 bars (1000 lb/in) without external leakage, failure, or permanent set (see ). If a spring is used that permits a pressure setting beyond 35 bar
36、s (500 lb/in23.5.4 ), the proof pressure shall be 200 percent of the maximum pressure setting. Internal leakageDIFFERENTIAL PRESSUREAT MINIMUM RESEATNOMINAL SET PRESSURE0.71.42.12.83.44.15.56.913.820.727.634.541.455.269.0DIFFERENTIALPRESSURELB/INBARS102030405060801002003004005006008001000NON-DIMENSI
37、ONAL AXISDIFFERENTIAL PRESSUREAT MAXIMUM RATED FLOW. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-24694A(SH) 6 3.5.4.1 Reseat. For any pressure settling throughout the applicable operating range, the valve shall reseat at not less than the
38、 minimum reseat pressure shown on figure 1. The valve is considered to be reseated when leakage does not exceed that specified in the applicable specification sheet (see 3.1). 3.5.4.2 Leakage3.5.5 . As pressure is decreased after reseating, the leakage shall not exceed 1 milliliter (0.061 cubic inch
39、) per minute at a pressure equivalent to 75 percent of the set pressure. With pressure increased from zero to the minimum reseat pressure, the leakage shall not exceed 1 milliliter (0.061 cubic inch) per minute. Endurance4.6.7. The valve shall show no sign of damage to the seating surface, instabili
40、ty, or leakage in excess of twice the amount specified in the applicable specification sheet (see ). 3.5.6 Vibration4.6.5. The relief valves shall operate as specified herein after being subjected to exploratory, variable frequency, and resonance dwell sinusoidal vibration tests in each of three mut
41、ually perpendicular axes (see ). Any of the following conditions resulting from vibration are considered unacceptable: a. Damage to parts. b. Loosening of parts. c. Degradation of operational performance (including leakage) below specification requirements. 3.5.7 Shock3.5.8 . The valve shall meet th
42、e shock requirements as specified in MIL-S-901 for Grade A, Class I equipment (see 4.6.6). Reseat pressure. The reseat pressure for any nominal set pressure shall be as shown on figure 1 (see 4.6.3.2). 3.5.9 Burst pressure 3.1. Unless otherwise specified (see ), the valve shall withstand a burst pre
43、ssure of 140 bars (2030 lb/in). 3.5.10 Operating temperature 3.1. Unless otherwise specified (see ), the valves shall operate throughout a temperature range of -29 to 135 C (-20 to 275 F) when used with fluids suitable for the operating temperature. 3.6 Identification markinga. Manufacturers name, t
44、rademark, or logo. . Each valve shall be clearly and permanently identified by steel stamping, electrochemical etch, or equivalent means with the following information and symbol: b. Specification sheet part number. c. Manufacturers part number. d. Assembly date (by quarter and year). 3.7 Interchang
45、eability3.8 . In no case shall parts be physically interchangeable or reversible unless such parts are also interchangeable or reversible with regard to function, performance, and strength. Drawings 6.2. When specified (see ), drawings shall display component assembly with parts identification/speci
46、fication and provide pressure setting adjustment instructions. 3.9 Workmanship4. VERIFICATION . The valve body and internal parts shall be free of burrs, sharp edges, or any other damage or defects that could prevent the part from performing its intended purpose. Valve shall be free of all metal chi
47、ps, grit, dirt, and other foreign matter. 4.1 Classification of inspectionsa. Qualification inspection (see . The inspection requirements specified herein are classified as follows: 4.2). b. Conformance inspection (see 4.3). Provided by IHSNot for ResaleNo reproduction or networking permitted withou
48、t license from IHS-,-,-MIL-DTL-24694A(SH) 7 4.2 Qualification inspection3.2. Qualification inspection shall be performed on valves when qualification is required (see ). Qualification inspection shall be conducted at a laboratory satisfactory to NAVSEA. This inspection shall consist of the examinati
49、ons and tests shown in table I. Tests shall be conducted in the sequence listed in table I unless otherwise approved by the qualifying activity. TABLE I. Qualification inspection. Examination or test Requirement paragraph Examination or text paragraph Visual examination 3.3, 3.4, 3.6, 3.7, 3.8, 3.9 4.6.1 Proof pressure 3.5.3 4.6.2 Shock 3.5.7 4.6.6 Vibration 3.5.6 4.6.5 Performance testing 3.5 4.6.3, 4.6.4 R
