1、 AMSC N/A FSC 4820 Comments, suggestions, or questions on this document should be addressed to: DLA Land and Maritime, Attn: VAI, P.O. Box 3990, Columbus, OH 43218-3990, or emailed to FluidFlowdla.mil. Since contact information can change, you may want to verify the currency of this address informat
2、ion using the ASSIST Online database at https:/assist.daps.dla.mil. MIL-DTL-5523E 23 November 2011 SUPERSEDING MIL-V-5523D 28 February 1991 DETAIL SPECIFICATION VALVE; RELIEF, HYDRAULIC PRESSURE This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. S
3、COPE 1.1 Scope. This specification establishes the requirements for hydraulic pressure relief valves. 1.2 Classification. Relief valves are of the following types and classes as specified. 1.2.1 Type I Rectangular envelope, conforming to AN6279. 1.2.2 Classes: Class YZ Adjustable from 100 to 1,000 p
4、si at rated relief flow Class AB Adjustable from 1,000 to 2,300 psi at rated relief flow Class CD Adjustable from 2,300 to 3,850 psi at rated relief flow 1.2.3 Other classes. Relief valves adjustable to the range of more than one class, carry in the Part or Identifying Number (PIN) the abbreviated l
5、etter designation of the lowest and highest pressure class, for example: A valve adjustable from 1,000 to 3,850 psi would be AN6279AD. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include d
6、ocuments cited in other sections of this specification or recommended 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,
7、or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these do
8、cuments are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATIONS AN6248 Pump Hydraulic Hand, Type 3000 AN6279 Valve - Hydraulic Pressure Relief Two Port MIL-G-5514 Gland Design, Packing, Hydraulic, General Requirements For MIL-DTL-5516 Packing, Preformed, Petroleum Hydra
9、ulic Fluid Resistant, 160F (71C) MIL-DTL-5541 Chemical Conversion Coatings on Aluminum And Aluminum Alloys MIL-PRF-5606 Hydraulic Fluid, Petroleum Base; Aircraft, Missile, and Ordnance MIL-PRF-6083 Hydraulic Fluid, Petroleum Base, For Preservation And Operation MIL-A-8625 Anodic Coatings, For Alumin
10、um And Aluminum Alloys INCH-POUND Inactive for new design after 16 October 2009. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5523E 2 MIL-PRF-83282 Hydraulic Fluid Fire Resistant, Synthetic Hydrocarbon Base, Metric NATO Code Number H-537 M
11、IL-DTL-83488 Coating, Aluminum, High Purity MIL-PRF-87257 Hydraulic Fluid, Fire Resistant; Low Temperature, Synthetic Hydrocarbon Base, Aircraft And Missile MS28774 Retainer, Packing Backup, Single Turn, Polytetrafluoroethylene MS28777 Washer, Flat Aircraft Hydraulic Backup MS28783 Ring, Gasket, Bac
12、k-Up, PTFE DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 Identification Marking of U.S. Military Property MIL-STD-889 Dissimilar Metals MS16624 Ring, Retaining, External, Basic (Tapered Section Type) MS16625 Ring, Retaining, Internal, Basic (Tapered Section Type) MS21344 Fittings - Installation Of Fla
13、red Tube, Straight Threaded Connectors, Design Standard For (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The
14、following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of documents are those cited in the solicitation or contract. ASME INTERNATIONAL ASME B46.1 Surface Texture (Surface Roughness, Waviness, and Lay) (Copies of these documents are av
15、ailable online at http:/www.asme.org or from the ASME International, Three Park Avenue, New York, NY 10016-5990.) ASTM INTERNATIONAL ASTM B633 Electrodeposited Coatings of Zinc on Iron And Steel, Standard Specification For ASTM B700 Electrodeposited Coatings of Silver for Engineering Use, Standard S
16、pecification For ASTM B545 Electrodeposited Coatings of Tin, Standard Specification for ASTM E1444 Magnetic Particle Testing, Standard Practice for (Copies of these documents are available online at http:/www.astm.org or from the ASTM International, P.O. Box C700, 100 Barr Harbor Drive, West Conshoh
17、ocken, PA 19428-2959.) AEROSPACE INDUSTRIES ASSOCIATION (AIA) NASM20995 Wire, Safety or Lock NASM 33540 Safety Wiring, Safety Cabling, Cotter Pinning, General Practices For (Copies of these documents are available online at http:/www.aia-aerospace.org or from the Aerospace Industries Association, 10
18、00 Wilson Boulevard, Suite 1700, Arlington, VA 22209-3901.) INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) ISO 17025 General requirements for the competence of testing and calibration laboratories (Copies of these documents are available online at http:/www.iso.ch or from the International Org
19、anization for Standardization American National Standards Institute, 11 West 42nd Street, 13th Floor, New York, NY 10036.) NCSL INTERNATIONAL NCSL Z540.3 Requirements for the Calibration of Measuring and Test Equipment (Copies of these documents are available online at http:/www.ncsli.org or from NC
20、SL International 2995 Wilderness Place, Suite 107 Boulder, Colorado 80301-5404) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5523E 3 SAE INTERNATIONAL SAE AMS-QQ-N-290 Nickel Plating (Electrodeposited) SAE AMS 2404 Plating, Electroless Nic
21、kel SAE AMS 2460 Plating, Chromium SAE AS4059 Aerospace Fluid Power Cleanliness for Hydraulic Fluids SAE AS5169 Fitting, Port Plug and Bleeder SAE AS5202 Port or Fitting End, Internal Straight Thread, Design Standard SAE AS5440 Hydraulic Systems, Aircraft, Design, and Installation, Requirements For
22、SAE AS8775 Hydraulic System Components, Aircraft and Missiles, General Specification For SAE AS8879 Screw Threads - UNJ Profile, Inch Controlled Radius Root with Increased Minor Diameter SAE AS28775 Packing, Preformed, - MS28775 O-Ring SAE AS28778 Packing, Preformed, Straight Thread Tube Fitting Bos
23、s (Copies of these documents are available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 of these documents (outside USA), www.sae.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, i
24、n the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document take precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtaine
25、d. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet. In the event of any conflict between requirements of this specification and the specification sheets, the latter shall govern. 3.2 Fir
26、st article. When specified (see 6.3), a sample shall be subjected to first article inspection in accordance with 4.4. 3.3 Materials. Materials shall be as specified herein and shall conform to all applicable specification sheets. When a definite material is not specified, a material shall be used wh
27、ich will enable the pump to meet the requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guarantee of acceptance of the finished product. 3.3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environ
28、mentally preferable materials shall be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3.2 Metals. All metals shall be compatible with the fluid and intended tempe
29、rature, functional, service, and storage conditions to which the components will be exposed. The metals shall possess adequate corrosion-resistant characteristics or shall be suitably protected by the use of coatings equivalent to those listed in table I to resist corrosion which may result from suc
30、h conditions as dissimilar metal combinations, moisture, salt spray, and high temperature deterioration, as applicable. Where not indicated, class or type is at the option of the manufacturer, subject to approval by the procuring activity. Dissimilar metals are defined in MIL-STD-889. 3.3.2.1 Copper
31、 or aluminum alloys. All copper alloys shall be suitably protected with a coating specified in table I, except that cadmium and zinc plating shall not be used in applications subject to abrasion. Other metallic coatings, which shall have been demonstrated to be satisfactory to the Government, such a
32、s electroless nickel and electrodeposited 85 percent tin, 15 percent cadmium alloy, may be used. All aluminum alloys shall be anodized in accordance with MIL-A-8625, type II coating, except that in the absence of abrasive conditions the anodize may be type I coating, where applicable, or may be a ch
33、emical film in accordance with MIL-DTL-5541. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5523E 4 TABLE I. Metal coatings. Coating Specification Zinc Plating Chromium Plating Nickel Plating Silver Plating Tin Plating Electroless Nickel Alu
34、minum Coating ASTM B633 SAE AMS 2460 SAE AMS-QQ-N-290 ASTM B700 ASTM B545 SAE AMS 2404 MIL-DTL-83488, Type I or II 3.3.2.2 Type I components. Except for internal surfaces in constant contact with hydraulic fluid, ferrous alloys shall have a chromium content of not less than 12 percent, or shall be s
35、uitably protected against corrosion as specified in 3.3.2, 3.3.2.1 and table I. O-ring grooves for external seals shall not be considered as internal surfaces in constant contact with hydraulic fluid. Use of magnesium shall be subject to the approval of the procuring activity. 3.3.2.3 Residual magne
36、tism. Parts made of material that is capable of retaining residual magnetism, but are not intended to function as magnets, shall be demagnetized sufficiently to prevent system or component malfunction, including malfunction due to accumulation of magnetic contaminants. 3.3.3 Plastic parts. The use o
37、f plastic parts shall be subject to the approval of the procuring activity for the specific application involved. Valves shall not contain plastic parts; other than AN or MS standard parts, unless otherwise authorized by the contracting activity. 3.3.4 Standard parts. Standard parts (MS, AN, NAS, or
38、 JAN) shall be used wherever they are suitable for the purpose, and shall be identified on the drawing by their (MS, AN, NAS, or JAN) PIN. Commercial utility parts, such as screws, bolts, nuts, and cotter pins may be used, provided they possess suitable alteration, and provided the corresponding sta
39、ndard PIN are referenced in the parts list and, if practicable, on the contractors drawings. In the event there is no suitable corresponding standard part in effect on date of invitation for bids, commercial parts may be used provided they conform to all requirements of this specification. 3.4 Desig
40、n and construction. 3.4.1 General. The configuration, dimensions, and other details of design of standard valves shall conform to AN6279. Non-standard parts of components shall conform to the applicable manufacturers drawing as governed by SAE AS5440 or SAE AS8775. 3.4.2 Temperature range. Valves sh
41、all be designed and so constructed as to insure satisfactory operation throughout the temperature range of -65F to 160F (-53.9C to 71.1C) for Type I valves. 3.4.3 Threads. Straight threads conforming to SAE AS8879, Unified Fine Thread Series, classes UNF-3A and UNF-3B shall be used, unless it can be
42、 demonstrated that the use of other threads will result in a superior product. Pipe threads shall not be used except for permanently installed plugs. 3.4.4 Fluids. Components shall be designed to operate with MIL-PRF-5606, MIL-PRF-83282 or MIL-PRF-87257 hydraulic fluid. 3.4.5 Seals. 3.4.5.1 General.
43、 Components shall be so designed that, in assembly of parts, sufficient clearance exists to permit assembly of the components without damage to O-rings or backup rings where they pass threaded parts or sharp corners. MIL-G-5514 and MS21344 shall be used for Type I system packing installation. 3.4.5.
44、2 Packing type I valves. All packing and gaskets shall be in accordance with SAE AS28775, or SAE AS28778. Backup rings shall be in accordance with MS28774, MS28777, or MS28783. 3.4.6 Safetying. All threaded parts shall be securely locked or safetied by safety wiring, self-locking nuts, or other appr
45、oved methods. Safety wires shall be applied in accordance with NASM 33540 and shall conform to NASM20995. Star washers and jam nuts shall not be used as locking devices. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-5523E 5 3.4.7 Retainer r
46、ings. Except where they are positively retained form being dislodged from their grooves, retainer or snap rings shall not be used in any location where failure of the ring will allow blow-apart of the valve caused by internal pressure. Neither shall they be used in locations where the buildup of cle
47、arances and manufacturing tolerances will allow destructive end play in the assembly contributing toward failure of packings or gaskets, brinelling, or fatigue failure of parts. For retainer ring applications other than those where retention of hydraulically pressurized parts is involved, such as lo
48、cking in place nonpressurized end caps, etc., rings shall be in accordance with MS16625 and MS16624, or other approved designs. The rings shall be capable of being installed and removed with standard Pin-type pliers, or other standard tools developed for use with the specified rings. 3.4.8 Function-
49、adjustment screws. Function-adjustment screws shall be so designed and constructed that they can be positively locked to prevent loosening under vibration or flow. It shall be possible to adjust and lock the adjustable screws with a standard wrench or screw driver, and in addition, lock wire may be used to insure positive lock, if required. Where practicable, the adjustment means shall be such that the adjustment can be made under full system pressure wi
