1、Comments, suggestions, or questions on this document should be addressed to Defense Logistic Agency Aviation VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5610 or emailed to STDZNMGTdla.mil. Since contact information can change, you may want to verify the currency of this address information
2、 using the ASSIST Online database at https:/assist.daps.dla.mil. AMSC N/A FSC 6685 INCH-POUND MIL-DTL-6019E 4 February 2011 SUPERSEDING MIL-DTL-6019D 6 March 2002 DETAIL SPECIFICATION GAGES, PRESSURE, DIAL INDICATING, LOW-PRESSURE OXYGEN This specification is approved for use by all departments and
3、agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers low-pressure oxygen system pressure gages for aircraft use. 1.2 Classification. Low-pressure oxygen system pressure gages should be of the following types, as specified (see 6.2): Type I - regulator mounting low-pre
4、ssure oxygen Type II - panel mounting low-pressure oxygen 1.3 Part or identifying number (PIN). The following PINs are specified as continuation of PINs from previous AN sheets. Type I - AN6026-1B Type II - AN6021-1B Inactive for new design after 9 March 1999. Provided by IHSNot for ResaleNo reprodu
5、ction or networking permitted without license from IHS-,-,-MIL-DTL-6019E 2 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recom
6、mended 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 the documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.
7、2 Government documents. 2.2.1 Specifications and standards. The following specifications and standards 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 (see 6.2). FEDERAL SPECIFICATI
8、ONS A-A-59503 - Nitrogen, Technical. BB-O-925 - Oxygen, Technical, Gas and Liquid. FEDERAL STANDARDS FED-STD-595/37875 - White, Flat or Lusterless. FED-STD-595/31136 - Red, Flat or Lusterless. FED-STD-595/37038 - Black, Flat or Lusterless. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-G-81704 - Glass, Ai
9、rcraft Instrument, Lighting Wedge and Cover. MIL-PRF-5425 - Plastic Sheet, Acrylic, Heat Resistant. MIL-S-7742 - Screw Threads, Standard, Optimum Selected Series: General Specification for. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - Identification Marking of U.S. Military Property. MIL-STD-1916 -
10、 DoD Preferred Methods for Acceptance of Product. MIL-STD-31000 - Technical Data Packages. MS33638 - Cases, Instruments, Flange Mounted, Aircraft (Unless otherwise indicated, copies of the above specifications and standards are available from the Standardization Documents Order Desk, 700 Robbins Ave
11、nue, Building 4D, Philadelphia, PA 19111-5094. Electronic copies of the above specifications and standards may be obtained from https:/assist.daps.dla.mil.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-6019E 3 2.3 Non-government standard.
12、The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents are those specified in the solicitation or contract (see 6.2). SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE AS71051 - Pipe Threads, Taper, Aeronautical National F
13、orm, Symbol ANPT - Design and Inspection Standard. SAE AIR4071 - Lubricants for Oxygen Use. (Application for copies should be addressed to the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096-0001. Electronic copies of SAE standards may be obtained from http:/www.s
14、ae.org/.) 2.4 Order of precedence. 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, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations
15、 unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.3. 3.2 Materials. 3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or envi
16、ronmentally preferable materials should 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. 3.2.2 Nonferrous. Nonferrous materials shall be used for all parts of the
17、gage, except where ferrous materials are essential and do not come in direct contact with oxygen. 3.2.3 Nonmagnetic. Nonmagnetic materials shall be used for all parts of the instrument, except where magnetic materials are essential. 3.2.4 Metals. Metals shall be of the non-corrosive type unless suit
18、ably protected against corrosion during normal service life. 3.2.5 Lubrication. All lubrication shall be in accordance with SAE AIR4071. 3.3 Design. The gages shall be designed so that no parts will work loose in service. They shall be leak proof and shall be built to withstand without failure the s
19、trains, jars, vibrations, and other conditions incident to shipping, storage, installations, and service. Pivots, bearings, and gears shall neither bind nor shake, and shall be as near frictionless as practicable. The gages shall Provided by IHSNot for ResaleNo reproduction or networking permitted w
20、ithout license from IHS-,-,-MIL-DTL-6019E 4 be designed so that minor repairs, such as replacement of cover glasses and pointers, can be easily made by the personnel of the operating units without the aid of special tools. 3.4 Construction. 3.4.1 Threads. 3.4.1.1 Screw threads. Screw threads shall c
21、onform to MIL-S-7742. 3.4.1.2 Pipe threads. Pipe threads shall conform to SAE AS71051. 3.4.2 Cases. The cases for both the type I and type II gages shall be rain tight, except for a small vent hole on the bottom or underside. 3.4.2.1 Type I. 3.4.2.1.1 Case design. The case for type I gages shall be
22、as specified in figure 1. 3.4.2.1.2 Case material. The case shall be made of either a suitable ferrous or nonferrous low-density metal, and shall have a smooth surface with a durable dull black finish. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
23、MIL-DTL-6019E 5 3.4.2.2 Type II. 3.4.2.2.1 Case design. The case for type II gages shall be in accordance with MS33638, nominal 2 inch size and as specified in figure 2. The case shall be of a durable construction in order to prevent damage to the gage mechanism under conditions incident to shipping
24、, storage, installation, and service. 3.4.2.2.2 Case material. The case shall be made of either nonferrous low-density metal or a synthetic material and shall have a smooth surface with a durable dull black finish. The synthetic material shall be of the thermal setting type, composed of a suitable f
25、iller and phenol condensation product binder. 3.4.3 Bosses. Bosses shall be in accordance with figure 1 for type I gages and figure 2 for type II gages. Wrench flats shall be provided on the sides of the boss. 3.4.4 Operating mechanism. The indicating and the pressure elements shall comprise a unit
26、distinct from the case. This unit shall be sufficiently rugged in order that small distortions of the case will not affect the accuracy of the indications. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-6019E 6 3.4.4.1 Mechanism adjustment.
27、The mechanism shall be provided with a means to adjust or correct the indications, in case this becomes necessary during the service of the gage. Adjustment shall require no special tools. The operating mechanism and dial shall be capable of being easily removed from the case as a unit in order to f
28、acilitate adjustment of the gage. 3.4.4.2 Pointer adjustment. The pointer shall be light and sufficiently rigid to prevent oscillation under vibration and shall be free to swing beyond either end of the range without being engaged by a mechanical stop. Suitable stops shall be incorporated within the
29、 mechanism to prevent the sector from being disengaged from the pinion. The pointer shall be firmly attached to the mechanism, yet shall be readily adjustable. 3.4.4.3 Overpressure stop. An overpressure stop shall be provided on the gage, designed in such a manner as to restrain the mechanism rather
30、 than the pointer. The overpressure stop shall allow pointer travel beyond full scale to 525 25 pounds per square inch (psi). When extreme overpressure occurs, the stop shall not allow the pointer to move beyond the bottom center of the dial. 3.4.4.4 Hair springs. The hair springs shall be made from
31、 phosphor bronze. 3.4.4.5 Surge-pressure restriction. A restriction of 0.020-inch diameter shall be provided between the gage connection and gage mechanism. 3.4.5 Dial. The dial shall be fastened securely upon the frame of the mechanism by at least two screws in such a manner that it will not loosen
32、 or turn when the gage is vibrated. 3.4.5.1 Dial to cover glass distance. The distance between the dial and inside of the cover glass shall be the minimum practicable and shall not exceed 0.125 inch. 3.4.5.2 Face. The dials shall be as shown in figure 3 and table I for type I gages and figure 4 and
33、table II for type II gages. The faces shall be sufficiently durable to withstand usage encountered in service. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-6019E 7 Provided by IHSNot for ResaleNo reproduction or networking permitted withou
34、t license from IHS-,-,-MIL-DTL-6019E 8 TABLE I. Details of type I gage. Marking Height or length (inch) Width of line or graduation (inch 0.005) Material or finish Numerals 0, 100, 200, 300, 400, and 500 0.062 0.016 White equivalent to color chip 37875* Graduations at 50, 75, 125, 175, 225, 275, 325
35、, 375, and 425 0.062 0.016 White equivalent to color chip 37875* Graduations at 150, 250, and 350 0.094 0.016 White equivalent to color chip 37875* Lettering “psi“ 0.062 0.016 White equivalent to color chip 37875* Graduation at 450 0.156 0.031 Red equivalent to color chip 31136* Graduations at 0, 10
36、0, 200, 300, 400, and 500 0.156 including arc 0.031 White equivalent to color chip 37875* Arc from 50 to 100 0.094 White equivalent to color chip 37875* Arc from 100 to 425 0.031 White equivalent to color chip 37875* Lettering “Cyl Press“ 0.094 0.021 White equivalent to color chip 37875* Shaded part
37、 of pointer White equivalent to color chip 37875* Background of dial Black equivalent to color chip 37038* Unshaded part of pointer Black equivalent to color chip 37038* *Color chips are identified in FED-STD-595. Provided by IHSNot for ResaleNo reproduction or networking permitted without license f
38、rom IHS-,-,-MIL-DTL-6019E 9 TABLE II. Details of type II gage. Marking Height or length (inch) Width of line or graduation (inch 0.005) Material or finish Numerals 0, 100, 200, 300, 400, and 500 0.125 0.025 White equivalent to color chip 37875* Graduations at 0 and 100 0.125 above arc 0.031 White eq
39、uivalent to color chip 37875* Graduations at 200, 300, 400, and 500 0.188 min. above arc 0.031 White equivalent to color chip 37875* Graduation at 50 0.062 above arc 0.031 White equivalent to color chip 37875* Graduations at 150, 250, and 350 0.125 above arc 0.031 White equivalent to color chip 3787
40、5* Arc from 0 to 100 0.094 White equivalent to color chip 37875* Arc from 100 to 425 0.031 White equivalent to color chip 37875* Lettering “Oxygen cyl pressure“ 0.125 0.021 White equivalent to color chip 37875* Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
41、 IHS-,-,-MIL-DTL-6019E 10 Shaded part of pointer White equivalent to color chip 37875* Graduation at 450 0.188 min. 0.031 Red equivalent to color chip 31136* Lettering “Full“ 0.062 0.016 White equivalent to color chip 37875* Lettering “psi“ 0.062 0.016 Background of dial Black equivalent to color ch
42、ip 37038* Unshaded part of pointer Black equivalent to color chip 37038* *Color chips are identified in FED-STD-595. 3.4.5.2.1 Markings. Markings shall be sufficiently durable to withstand usage encountered in service. 3.4.5.2.2 Numerals. Numerals shall distinctly indicate the graduation to which ea
43、ch applies. Any confusion resulting in doubt as to which graduation the numeral applies shall be cause for rejection. When several numerals are used in one group, the space between the numerals shall be approximately 0.015 inch. 3.4.6 Pointers. The pointer for the type I gage shall be as shown in fi
44、gure 5. The pointer for the type II shall be as shown in figure 6. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-6019E 11 3.4.7 Cover glass. The cover glass shall be clear and free from flaws that will affect the readability of the gage. 3.
45、4.7.1 Type I. The cover glass for the type I gage shall be fabricated from 0.100-inch plastic conforming to finish A of MIL-PRF-5425. 3.4.7.2 Type II. The cover glass for the type II gage shall conform to MIL-G-81704. Physical size and tolerances shall be as specified in the contract (see 6.2). 3.4.
46、8 Snap rings. Snap rings, or any other means suitable to the procuring activity, shall be used to hold the cover glass in the case. Means shall be provided to permit easy removal of the cover glass without breakage. 3.4.9 Mounting nuts (type II only). Each mounting lug shall be fitted with a self-lo
47、cking threaded nut, as specified on the applicable drawing. 3.4.10 Contractor-furnished equipment (type II only). The contractor shall furnish sufficient mounting screws for installing the type II gage. The screws shall be No. 6-32 roundhead, brass machine screws of sufficient length for mounting on
48、 a panel 0.188 inch thick. They shall have a durable dull black finish. 3.5 Interchangeability. All parts having the same manufacturers part number shall be directly and completely interchangeable with each other with respect to installation and Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-6019E 12 performance. Changes in manufacturers part numbers shall be governed by the drawing number requirements of MIL-STD-31000. 3.6 Finish. Protective coatings and finishes that will crack, chip, or scale duri
