1、-_ MIL-V-5527A Lb 77799Ob OLLi950 T - : MIL -V- 55 27A 14 MAY 1951 Superseding 3 January i950 MIL-V-5527 MILITARY SPECIFICATION VALVES; .ATRCRAFT, HYDRAULIC T-L MPANSION RELIEF This specification was approved by the Departments of the Army, the Navy, and the Air Force for use of procurement services
2、 of the respective Departments . le SCOPE lol Scope.- This specification establishes the requirements for hydraulic thermal expansion relief valves of the types and classes specified herein. lo 2 1.2.1 C1 as sif i cation . - Types.- Hydraulic thermal expansion relief valves shall be of the following
3、 types: Single - In accordance with Drawing AN6245 Dual - In accordance with Standard 28016 1.2.2 Classes.- Hydraulic thermal expansion relief valves shall be of the follow- ing classes: Class A - Pressure Range 1,ooO to 2,100 psi (cracking pressure) Class B - Pressure Range 2,100 to 4,100 psi (crac
4、king pressure) Class Ai3 - Pressure Range 1,000 to 4,100 psi (cracking pressure) - Size.- 1.2.3 Hydraulic thermal expansion relief valves shall be furnished in the sizes indicated on the.applicable AN drawing or MS standard, as specified. 20 APPLICABLE SPECIFICATIONS, OTHER PUBLICATIONS, AND DRAWINC
5、S 2.1 The following publications, of the issue in effect on date of invitation for bids, shall form a part of this specification to the extent specified herein: 2.1J Specifications.- Federal CQ-P-liL6 Plathg, Cadmium (Electrodeposited) Military MIL-c-5501 Closure; Aircraft Tubing Protective MIL-D-SO
6、28 Drawings and Data Lists; Preparation of . Awcili ary Equipment ) (For Engines, Accessories, and Other r .* - - THIS QOCUF4ENT WNTAIMa -GPAGB. * Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-552 7A (May 1951) 2.1.2 2.1.3 MIL-H-O MIL-1-6868
7、MIL-0-6083 MIL-P-5S14 MIL-O-O MIL-P-5517 MIL-P-6064 MIL- P-68 71 Hydraulic Systems; Design, Installation and Tests of Aircraft (General Specifi- cation for) Inspection Process, Magnetic Particle Oil; Hydraulic, Airckaft Petrol.eum Base oil; Preservative, Hydraulic Equipment Packings; Installation an
8、d ELand Design of Aircraft Hydraulic and Pneumatic (General Specification for) Plastic Parts in Aircraft Hydraulic Equipment; General Tests for Packaging of Lightweigf Aircraft Accessories Plating; Chromium Gr Force-Navy Aeronautical 4 AN- QQ-A-69 6 AN-S-126 screw-Threads; Standarb, Aircraft Anodic-
9、Films; Corrosion-Protective (for) Aluminum Alloys U. S. Army 94-40645 Marking; Exterior, Domestic, and Export Shipment, by Contractors Other Publications.- Bureau of Supplies and Accounts Navy Shipment Marking Handbook Air Force-Navy Aeronautical Bulletin NO. i43 Specifications and Standards, Use of
10、 Drawings. - Military Standards (Sh-eG E28016 Valves - Hydraiilic, Dual Thermal Expansion Relief Air Force-Navy Aeronautical Standard Drawings AN814 AN995 Wire - Lock AN6245 AN6290 AND10050 AND10074 Boss Spacing - Hydraulic Plugand Bleeder - Screw Thread Valves - Hydraulic Thermal Expansion Relief G
11、asket - Straight Thread Tube Fittings, Boss Bosses - Standard Dimensions for Casket Seal Straight Thread (Copies of this specification and copies of other publications referenced herein or required for Government procurement, and the Index of Military Aeronautical (AN or MIL) Standards, may be obtai
12、ned upon application to the Commanding Peneral, Air Development Force, Wright-Patterson Air Force Base, Dayton, Ohio; or the Commanding Officer, U, S. Naval Air Station, Johnsville, Pennsylvania. ) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.-
13、 MIL-V-5527A 1b W 9997706 0184952 3 W MIL-V-SS27A (May 1951) 3. REQUIRENE“S 3.1 Materials.- Materials and processes used in the manufacture of these valves. shall be of high quality, suitable for the purpose and shall conform to applicable Govern- ment specifications. provided the specifications are
14、 satisfactory t.0 the Government and contain provisions for adequate tests. Government inspection. Metals.- All metals used in the construction of these valves, except,metal which is in constant contact with the hydraulic fluid, shall be of a corrosion-resisting type or shall be adequately protected
15、 to resist corrosion during the normal service life of the valve. The use of dissimilar metals, especially brass, copper, or steel, in metal to metal contact uith aluminum or aiuninum alloy, shall be avoided wherever practicable, of the Services for the specific application involved. Materials confo
16、rming to contractors specifications may be used, The use of contractors specifications will not constitute waiver of 3.1.1 3.1.2 Plastic .Parts.- The use of plastic parts shall be subject to the approval 3.1.3 Selection of Materials.- Specifications and standards for all materials, parts, and Govern
17、ment certification and approval of proc8sses and equipment which are not specifically designated herein and which arenecessary for the execution of this specifica- tion, shall be selected in accordance with ANA Bulletin No. 143, except as provided in the following paragraph. 3.1.3.1 AN or JAN Standa
18、rd Parts.- AN or JAN Standard parts shall be used wherever they are suitable for the purpose, and shall be identified on the drawing by their part numbers. used, proeded they possess suitable properties and are replaceable by the AN or JAN Standard parts without alteration, and provided the correspo
19、nding AN or JAN part numbers are referenced in the parts list and, if practicable, on the contractors drawings. the event there is no satable corresponding AN or JAN Standard part in effect on date of invitation for bids, commercial parts may be used provided they conform to all requirements of this
20、 specification. Commercial utilityparts such as screws, bolts, nuts, cotter pins, etc., may be In a 3.2 Design and Construction.- 3.2.1 General.- The configuration, dimensions, and other details of design shall The valves shall be designed to operate satisfactorily conform to the -requirements of th
21、e applicable drawings. throughout a temperature range of -540 to +7iC (-650 to +160“F). be removed during the life ,of the valve, shall conform to DrawLng AN8a and shall be sealed with gaskets conforming to Drawing AN6290, or of any form suitable for the purpose. 3.2.2 Temperature Range.- 3.2.3 Plug
22、s.- All plugs, except permanently installed plugs which will not have to Permanently installed plugs may be pipe-threaded 3.2.4. Threads.- Except for permanently installedplugs, and unless otherwise specified on the applicable drawing, only strai ht threads conforming to Specification AN-S-126, Nati
23、onal Fine Thread Series, class 3 fW3) .shall be usedo 3.2.5 Bosses.-. All bosses for connecting fittings shall conform to Drawings ANDlOOO and ANDl74. . 3.2.6 Seals.- All packings, gaskets, and installations thereof shall conform to Safetying.- All threaded parts shall be positively locked or safeti
24、ed by Safety Ail parts havingthe same manufacturers part number shall be directly and completely interchangeable with each other.with respect to installation and performance. requirements of Specification MIL-D-o. components, must be interchangeable as assembled units,and shall be so indicated on th
25、e manufacturers drawing. interchangeable. Changes in manufacturers part numbers shall be governed by the.drawing number Sub-assemblies, composed of selected mating The individual components of such assembled units need not be 3.4 Weight.- The weight shall be held to a minimum consistent with the req
26、uirements of this specification. 3.5 Finish.- 3.5.1 Aluminum-Alloy Parts.- Unless otherwise specified, all aluminum-alloy parts, except those in constant contact with hydraulic fluid, shall be anodized in accordance with the requirements of Specification AN-QQ-A-696. 3.5.2 Steel Parts.- Unless other
27、wise specified, all steel or copper-alloyparts, exceat those in constant contact with hydraulic fluid, shall be cadmium-plated in accord- ance with Specification QQ-P- (b) Inspection tests: Inspectiontests are those tests accomplished on vaves manufactured and submitted for acceptance under contract
28、. 4.2 .Qualification Tests.- 4.2.1 Sampling Instructions.- 4.2.1.1 he Qualification test sample shall consist.of two valves of each part numb=. upon which qualifica-tion is desired. 4.2.1.2 One of these valves shall be assembled of selected parts such that the . ., . clearance, with regard to linear
29、, diametral, and concentric tolerances, betueenthe moving members, conducrve to malfunction at extreme temperatures, will be within 10 percent of the minimum clearance permitted by the manufacturers drawings, except that 10 ring grooves which are fabri.cated in accordance with Specification MLL-P-SS
30、fi shall be within the drawing tolerances. , This sample shall be marked No. 1. 4*2.1.3 The second sample shall be assembled of selected parts such that the ele HYDRAULIC THERMAI, WPANSION RELI MS or AN Part No. Mrr?ufacturerts Part No. Narne of Manufacturer An additional copy of the test report and
31、 drawings shall accompany the sample units. 4.2.1.6 Qualification of one type valve under this specification, may at the dis- cretion of the Services, be extended to other types of valves after performance of only one or two minor tests, if all of the internal working parts are completely identical
32、and . interchangeable in.every respect with the corresponding working parts of Fe qualified valve. For example, qualification of this type might be applied to valves which differ from previously qualified valves only insofar as port size, port location, ekternal body dimensions and extern AIRCRAFT H
33、PDRAULIC THWMAL EXPANSION RELIEF Specific ation MIL -V-552 7A MS or AN Part No. Manufacturers Part No. Name of Manufacturer Name of Contractor (if different from manufacturer) Contract or Order No. 5.4 Shipping Containers.- Each shipping container shall be marked in accordance with the requirements
34、applicable to the individual Services, as specified in Specifica- tion 94-40645 for the Air Force, and the Navy Shipment Marking Handbook for the Navy. 6. NOTES 6.1 Intended Use.- The thermal relief valves covered by this specification are intended for use in aircraft hydraulic systems as covered by
35、 Specification MIL-H-5440 to provide for relief of excessive pressure resulting from volumet$c,changes, and should not be used with any hydraulic fluid other than that conforming to Specification MIL-0-5606 unless otherwise specified by the Procuring Service. 6.1.1 Class A valves shall be used ohy i
36、n,i,OCi Ad 1,!3XI psi systems as defined in Specification MIL-H-SUO. 6.1.2 Class B valves shall be used only in 3,800 psi systems. 6.1.3 Class kl valves may be used in either l,oOO, 1,503, or 3,000 psi systems. 6.2 . Superseding Data.- This specification supersedes Specification MIL-V-5527, which wa
37、s the number assigned by: Cover Sheet to Specification AN-V-28. _. 6.3 Ordering Data.- Requisitions, contracts, and orders shoi;ld state the MS or AN part number of the *valves desired, and whether overseas packing is desired. Provided by IHSNot for ResaleNo reproduction or networking permitted with
38、out license from IHS-,-,-MIL-V-5527A Ib W 77777Ob OL847bI 4 6.4 Qualified Products List,- Products considered acceptable under this specific- tion ape i-t revisiode . 605 Provisions for Qualification Tests.- Theright is reserved to reject any bids on items which have not been subjected to the requir
39、ed tests and found satisfactory. The attention of the manufacturers is called to this provision, and.they are urged to request authorizaticn for tests of the items which they propose to offer to the Air Force or Navy under this specification. Requests for authorization of tests together with certifi
40、ed test reports showing conformance with all the requirements of this specification and the manufactur.ers assembly and detail drawings, and for information as to the marking and forwarding of samples should be addressed to the Bureau of Aeronautics, Navy Department, Washington 25, D. C., the Qualif
41、ying Service, with a copy to the Commanding General, Air Development Force, Wright-Patterson Air Force Base, Dayton, Ohio. samples shall be furnished at no cost to the Government, and that the manufacturer shall pay the transportation charges to and from the designated point where tests are to be ma
42、de. In Che case of failure of the sample or samples submitted, consideration will be given to the request of the manufacturer for additional tests only after it has been clearly shown that changes have been made in the product which the Government considers sufficient to warrant additional testsi .
43、6.5.1 It is to be understood that upon receipt of the Letter of Authorization, 6.6 Detail and Assembly Drawings.- Detail and assembly drawings of the relief valve shall be furnished, in duplicate, for each new model valve. .show a cut-away section of all details in their normal assembled position an
44、d shall carry part numbers of all details and subassemblies. The following data shall be furnished on, or together with all assembly drawings: Assembly drawings shall Mounting position and dimensions Port dimensions her-all dimensions . Actual flous capacity Actual pressure range Dry weight Method o
45、f, adjusting pressure rating Dismantling proaedure and procedure for replacing Any special installation or operating instructions synthetic packings if used. considered necessary. NmCE: When Government drawings, specifications, or other data are used for any purpose other than in connection with a d
46、efinitely related overhnent procurement operation, the United States Government thereby incurs no responsibility 1 nor any obligation whatsoever; and the fact that the Govern- .ment may have formulated, furnished, or in any way supplied -the said drawings, specifications, or other data is not to be
47、regarded by implication or otherwise as in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, .use, or sell any patented invention that may in any way be related thereto. - . clz3todiani Navy - Bureau of Aeronautics Other nterest: . Air Force 12 E16889 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
