1、MIL-G-25507B 66 9999906 BY76692 ia H . . ._ . I I NCH-POUND I MI L-G-2 5 507 B (AS 1 15 April 1991 SUPERSEDING 31 January 1957 MIL-G-25507A(USAF) MILITARY SPECIFICATION GAGE, PRESSURE, DIAL INDICATION, OXYGEN 0-2000 PSI, TYPE MF-2 This specification i-s approved for use within the Naval Air Systems
2、Command, . Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a 1 1/2 inch round dial, high pressure oxygen system pressure gage (range 0-2000 psi). 2. APPLICABLE DOCUMENTS 2.1 Government docume
3、nts. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified. herein. in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the soli
4、citation (see 6.2b). Unless otherwise specified, the issues of these documents are those .l.isted SPEC1 FICATIONS F ED E RAL BB-A- 1034 - Air, Compressed, for Breathi ng. Purposes. BB-N-411 - Ni trogen, Techni cal. , Beneficial comments (recommendations, additions, deletions) and any pertinent data
5、which may be of use in improving this document should be addressed to: Systems Engineering and Standardization Department (Code 531, Naval Air Engineering Center, Lakehurst, NJ 08733-5100, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end o
6、f this document! or by letter. AMSC NIA FSC 6685 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- MIL-G-25507B bb 999990b 047bb93 I i? 4 PPP- 8-60 1 - PPP-B-62 1 - PP
7、P- 6-6 3 6 - PPP- 8- 640 - MILITARY MIL-P-116 - MIL-P-7105 - STANDARDS FED ERAL FED-STD-H28/2 - MILITARY MI L-STD-105 - MIL-STD-129 - MIL-STD-130 - MI L-STD-889 - MI L-STD-1359 - MS 33 558 - Boxes, Wood, Cleated-Plywood Boxes, Wood, Nailed and Lock-Corner Boxes, Shipping, Fiberboard Boxes, Fiberboar
8、d, Corrugated, Triple-Wal 1 Preservation, Methods of Pipe Threads, Taper, Aeronautical National Form, Symbol ANPT, General Requirements for Unified Inch Screw Threads, UN and UNR Thread Forms Sampling Procedures and Tables for Inspection by Attributes Marki ng for Shi pment and Storage Identificatio
9、n Marking of U.S Military Property Dissimilar Metals Cleaning Methods and Procedures for Breathing Oxygen Equi pment Numerals. and Letters, Aircraft Instrument Dia Standard Form of (Unless otherwise indicated, copies of the federal and military specifica- tions, standards, and handbooks are availabl
10、e from the Standardization Documents Order Desk, Buildin.g.4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The following document forms a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD
11、 adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the .issues of the documents cited in the solicitation (see 6.2b). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI 1 ANSI B40.1-85 - Gauges, Pr
12、essure and Vacuum, Indicating (Application for copies should be addressed to the American National Standards, Dial Type-Elastic Element O Institute, 1430 Broadway, New York, NY 10018-3308.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-F MIL-G-25
13、507B 66 W 9999906 0476694 T = 5 MI L-G-25507B(AS 1 (Non-Government standards and other pub1 ications are normally available from the organizations that prepare or distribute the documents. may be available in or through libraries or other informational services.) These documents al so 2.3 Order of p
14、recedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in thi s document, however, supersedes appl i cab1 e 1 aws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 F
15、irst Article. When specified (see 6.21, a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.3. 3.2 Materials. Materials shall conform to applicable specifications and shall be as specified herein and on applicable drawings. Materials which are not covered by specif
16、ications, or which are not specifically described herein, shall be of,the lightest practicable weight, and suitable for the purpose intended. . 3.2.1 Metals. Metals shall be of the corrosion-resistant type or suitably treated to resist corrosion due to oxygen, salt spray, or atmospheric conditions l
17、ikely to be met in storage or normal service. 3.2.1.1 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metals shall not be used in intimate contact with each other. Dissimilar metals are defined in MIL-STD-889. 3.2.3 Nonferrous. Nonferrous materials shall be us
18、ed for all parts of the gage except where ferrous materials are essential and do not come in direct contact with the oxygen. 0 3.2.4 Nonmagnetic. Nonmagnetic materials shall be used for all parts of the gage except where magnetic materials are essential. 3.2.5 Protective treatment. Nhen materials ar
19、e used in the construction of the gage that are subject to deterioration when exposed to environmental conditions likely to occur during service usage, they shall be protected against such deterioration in a manner that will in no way prevent compliance with the performance requirements of this spec
20、ification. Protective coating which might crack, chip, or scale during normal service life or under extremes of environmental conditions shall not be used. 3.3 Standard parts. MS and AN standard parts shall be used where they suit the purpose. 3.4 ANSI standard. The gage shall conform to ANSI 840.1-
21、85. -4 3.5 Design and construction. The gage shall be designed and constructed so that no part will work loose in service. They shall be leakproof, and shall be . built to withstand without failure the strains, jars, vibrations, and other conditions incident to shipping, storage, installations, and
22、service. Any pivots, bearings, gears or other moving Darts shall neither bind nor shake. and shall- be as a near frictionless as pract - repairs can be easily made of special tools. cable. by the personnel of the operating units without the aid The gages shall be so designed that minor 3 Provided by
23、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-25507B bb m 999990b 047bb95 L m c I * MI L-G-25507B( AS) 3.5.1 Case. The case shall be in accordance with Figure 1. The case shall be made of either nonferrous low-density metal or a synthetic material and s
24、hall have a smooth surface with a durable dull black finish. The synthetic material shall be of the thermal-setting type. The case shall be of a durable construction to prevent damage to the gage mechanism under conditions incident to shipping, storage, installation and service. 3.5.2 Bosses. The bo
25、sses shall be as shown in figure 1. Wrench flats shall . be provided on the sides of the boss. 3.5.3 Operating mechanism. The indicating and the pressure elements shall comwise a unit distinct from the case. This unit shall be sufficiently rugged in order that small distorations of the case will not
26、 affect the accuracy of the i nd i cat ions . correct the indications during the service life .of the gage. require no special tools. loosen or turn when the gage is vibrated. plate, they shall be so located that they will not interfere with any dial marking or prevent locating any dial marking in t
27、he proper location. 3.5.3.1 Gage adjustment. The gage shall be provided with a means to adjust or Adjustment shall 3.5.4 Dial. The dial shall be held securely in such a manner that it will not If screws are used to attach the dial . O 3.5.4.1 Dial face. The .dial. face shall be as shown in figure 2.
28、 3.5.5 Pointer. The pointer shall be in accordance with figure 3. It shall be light and sufficient rigid to prevent oscillation under vibration, and shall be free to swing beyond eithe.r end of the range without being engaged by a mechanical stop. Suitable stops shall be incorporated within the mech
29、anism to prevent disengagement if possible due to operating mechanism design. The pointer shall be of such length as to touch but never overlap the graduations on the dial face. indicating end of the pointer shall be painted white. The pointer. The overpressure stop shal * 5 psi. 3.5.5.2 Hair spring
30、s. Hair spr bronze. 3.5.5.1 Overpressure stop. An overpressure stop shall be provided on the gage, designed in such a manner as to restrain the mechanism rather that the allow pointer travel beyond full scale, 2100 ngs, if used, shall be made from phosphor 3.5.6 Surge pressure restriction. A restric
31、tion of 0.020 inch diameter shall be provided between the gage connection and the gage mechanism. 3.6 Performance. 3.6.1 Visual examination and dimensional check. 3.6.1.1 Visual examination. When visually examined as specified in the gage shall conform to the requirements of this specification. Tabl
32、e Classification of Defects for Visual Examination, shall be used to class enumerate the defects. 4.6.1.1, IV, fy and 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-25507B 66 9999906 0476696 3 II .- _ . MIL-G-25507B(AS) - 3.6.1.2 Dimensional
33、 check. When dimensionally checked as specified in 4.6.1.2, the gage shall conform to the requirements of figures 1, 2, and 3. Any measurement deviating from the specified dimensions and tolerances shal 1. be classified as adimensional defect. 3.6:2 Scale error (room temperature). The gage when test
34、ed as. specified in 4.6.2, shall read within the scale tolerance specified in Table I. 3i6.3 Friction. The friction error of the gage, when tested as specified in 4.6.3, shall not exceed 50 psi. 3:6.4 Leakage. The pressure readings of the gage, when tested as specified in 4.6.4,. shall be the same.
35、3.6.5 Low temperature and cold .resistance. .The gage when tested as specified in 4.6.5, shall show no evidence of material failure and the gage pointer shall move smoothly throughout the entire range of travel. scale error and friction test points shall be within the tolerance specified in Table I
36、and in 3.6.3. The pressure readings for the 3.6.6 High temperature. The gage, when tested as specified in 4.6.6, shall not show any evidence of material failure and the pressure readings for the scale error test points shall be as specified in Table I. 3.6.7 Vibration. The gage, when tested as speci
37、fied in 4.6.7, shall not show any evidence of material failure and the pressure readings for the scale error test points shall be as specified in Table I. any evidence of material failure and the gage pressure readings for the scale error (room temperature) test points shall be as specified in Table
38、 I. 3.6.8 Seasoning. The gage, when tested as specified in 4.6.8, shall not show 3.6.9 Drift. The gage pressure reading, when tested as specified in 4.6.9, shall not increase more than 30 psi. 3.6.10 Overpressure. The gage, when tested as specified in 4.6.10, shall show no evidence of material failu
39、re and the pressure readings for the scale error (room temperature) test points shall be as specified in Table I. Threads. 3.7 3.7.1 Screw threads. Screw threads shall conform to FED-STD-H28/2. 3.7.2 Pipe threads. Pipe threads shall conform to MIL-P-7105. 3.8 Interchangeabi 1 i ty. Al 1 parts having
40、 the same manufacturers part number shall be functionally and dimensionally interchangeable. 3.9 Weight. The weight of the gage shall not exceed 0.20 pounds. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-G-25507B bb 999990b 0476677 5 MIL-G-2
41、5507B(AS) 3.10 Identification marking. The gage shall be marked in accordance with MIL-STD-130 and shall contain the following information: GAGE, PRESSURE, DIAL INDICATING, OXYGEN 0-2000 PSI, Type MF-2 MI L-G-25507 MANUFACTURERS IDENTIFICATION CONTRACT OR ORDER NO. 3.11 Cleanliness. The gage shall b
42、e free of oil, grease and other organic material. 3.12 Workmanship. The gage shall be uniform in quality and shall be free from irregularities, defects or foreign matter which .could adversely affect safety, performance, re1 iabi 1 i ty or durabi 1 i ty. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsib
43、ility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use h
44、is own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and se
45、rvices conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection
46、 requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with ail requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable prac
47、tice to ascertain conformance to requirements, however, this does not authorize submission of known defectivmaterial, either indicated or actual, nor does it commit the Government to accept defective material. .4.2 Classification of inspection. The inspection requirements specified herein are classi
48、fied as follows: a. First article inspection. First article inspection consists of tests and examinations performed on samples which are representative of the production item after award of contract to determine that the production item conforms to the requirements of this specification (see 4.3). b
49、. Quality conformance inspection. Quality conformance inspection consists of tests and examinations performed on individual products or c e I lots with the requirements set forth in this specification (see 4.4) the examinations and tests specified in Table II. e 4.3 First article inspection. First article inspection shall consist of all 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL
