1、AMSC N/A FSC 1660 INCH-POUND MIL-PRF-83178C 18 May 2009 SUPERSEDING MIL-PRF-83178B 24 September 1999 PERFORMANCE SPECIFICATION REGULATOR, OXYGEN, DILUTER-DEMAND, AUTOMATIC-PRESSURE-BREATHING, CRU-73A, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of
2、 the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the general requirements for a panel mounted automatic-pressure-breathing, diluter-demand, oxygen regulator, designated CRU-73A. 1.2 Classification. 1.2.1 Panel lighting. There are three panel lighting configurations of the re
3、gulator, see the list on figure 1. 1.3 Part or Identifying Number (PIN). The PIN to be used for the regulators acquired to this specification, are created as follows. M83178 dash numbers supersede MS27599 dash numbers. M 83178 -X Dash number (see figure 1) Specification number Prefix for military sp
4、ecification Comments, suggestions, or questions on this document should be addressed to Oklahoma City Air Logistics Center/ENSDAA, 3001 Staff Drive, Tinker AFB, OK 73145-3036 or emailed to af71tinker.af.mil. Since contact information can change, you may want to verify the currency of this address in
5、formation using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83178C 2 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, and 5
6、of this specification. This section does not include documents 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 specif
7、ied requirements of the documents cited in sections 3, 4, and 5 of this specification, whether or not they are listed. 2.2 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 otherwis
8、e specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL SPECIFICATIONS BB-A-1034 - Compressed Air, Breathing FEDERAL STANDARDS FED-STD-595/37038 - Miscellaneous, Flat or Lusterless COMMERCIAL ITEM DESCRIPTIONS A-A-59503 - Nitrogen, Technical DEPARTMENT OF
9、DEFENSE SPECIFICATIONS MIL-DTL-6363/8 - Lamps, Incandescent Aircraft Service, Single Contact, Midget Flanged Base, T-1 Bulb MIL-F-25173 - Fastener, Control Panel, Aircraft Equipment MIL-G-25520 - Gage, Pressure, Dial Indication, Oxygen 0-500 psi, Type MF-3 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-461
10、 - Requirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipment (Copies of these documents are available online at http:/assist.daps.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Pr
11、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83178C 3 2.2.2 Other government documents, drawings, and publications. The following other government documents, drawings, and publications form a part of this document to the extent specified her
12、ein. Unless otherwise specified, the issues are those cited in the solicitation or contract. TECHNICAL MANUAL TO 15X-1-1 - Maintenance Instructions, Oxygen Equipment (For information to obtain copies of this document contact OC-ALC/ENGLA Bldg 3, Room 203, Tinker AFB OK 73145-9147. Commercial telepho
13、ne: 405 736-2466.) 2.3 Non-government publications. The 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. ASME INTERNATIONAL ANSI/ASME-B1.20.1 - Pipe Threads, Gen
14、eral Purpose (Inch) (DoD adopted) (ASME documents may be obtained online at http:/www.asme.org/ or addressed to ASME International, Three Park Ave., M/S 10E, New York NY 10016-5990.) ASTM INTERNATIONAL ASTM-B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus (DoD adopted) ASTM-D1149 -
15、Standard Test Method for Rubber Deterioration- Cracking in a Ozone Controlled Environment (DoD adopted) (ASTM documents may be obtained online at www.astm.org or addressed to the American Society for Testing and Material, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) AMERICAN SOCIETY FOR
16、 QUALITY (ASQ) ANSI/ASQ Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (DoD-adopted) (ASQ documents may be obtained online at http:/www.asq.org/ or addressed to the American Society for Quality, P.O. Box 3005, Milwaukee, WI 53201-3005 or 600 North Plankinton Avenue, Milwaukee, WI
17、 53203.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83178C 4 SAE INTERNATIONAL SAE-AS1065 - Quality and Serviceability Requirements for Aircraft Cylinder Assemblies Charged with Aviators Breathing Oxygen SAE AS 7788 - Panels, Information
18、 Integrally Illuminated (DoD adopted) SAE-AS8010 - Aviators Breathing Oxygen Purity Standard (SAE documents may be obtained online at http:/www.sae.org/ or addressed to the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096- 0001.) 2.4 Order of precedence. Unless oth
19、erwise 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 unless a specific exemption has been obtaine
20、d. 3. REQUIREMENTS 3.1 Qualification. The regulators furnished under this specification shall be products that are authorized by the qualifying activity for listing on the applicable qualified products list before contract award (see 6.3). 3.2 Recycled, recovered, or environmentally preferable mater
21、ials. 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 economically advantageous life cycle costs. 3.3 Cleanliness. All surfaces shall be
22、free of visible particulates (50 microns and larger), free of visible fluorinated lubricants, and free of hydrocarbon contamination to a level not greater than 3 milligrams per square foot (mg/ft2) (see 6.6). 3.4 Materials. All materials shall be corrosion resistant or suitably treated to resist cor
23、rosion due to electrolytic decomposition, salt air, and any other atmospheric conditions that may be encountered during operational use or storage. The use of toxic chemicals, hazardous substances, or ozone depleting chemicals shall be avoided, whenever feasible. 3.4.1 Safety specific materials. All
24、 materials used shall be capable of operating in pure oxygen environment without creating a health or fire hazard (see 6.8). 3.4.2 Nonferrous materials. Except where essential, ferrous materials shall not be used. 3.4.3 Elastomers. Elastomers shall be of an ozone-resistant composition (see 6.12). Po
25、lyvinyl chloride shall not be used. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83178C 5 3.4.4 Finish. Unless otherwise specified in this specification, regulator surfaces shall not be painted. 3.5 Interface. 3.5.1 Regulator surfaces. Reg
26、ulator surfaces visible after installation, the test ports, and the test port cap shall be flat black, color number 37038 of FED-STD-595. 3.5.2 Regulator panel. The panel shall conform to SAE-AS7788 and the panel marking shall conform to figures 1 and 3. The background color of the panel shall be fl
27、at black, color number 37038 of FED STD-595. 3.5.3 Flow indicator. A flow indicator, conforming to figure 1, shall be provided on the regulator panel and shall show white when oxygen is flowing. 3.5.4 Pressure gage. The regulator panel shall be provided with a pressure gage conforming to MIL-G-25520
28、. The pressure gage shall indicate oxygen system pressure with the supply lever in either the on or off position. 3.5.5 Pipe threads. Pipe threads shall conform to ANSI/ASME-B1.20.1. 3.5.6 Dimensions. The regulator shall conform to dimensions shown on figures 1, 2, 4, 5, and 6. 3.5.7 Panel fasteners
29、. Panel fasteners shall conform to MIL-F-25173 (see figures 1 and 2). 3.5.8 Test ports. The regulator shall incorporate test ports on the panel conforming to figure 5. Test ports shall not obstruct the view of the flow indicator and pressure gage. With a pressure altitude of 34,000 feet applied to t
30、he pressure breathing test port, the regulator shall deliver an outlet pressure between 1.0 to 3.5 inches of water. With a pressure altitude of 43,000 feet applied to the pressure breathing test port, the regulator shall deliver an outlet pressure between 4.5 to 10.0 inches of water (see 6.10). At a
31、 pressure altitude between 27,000 and 32,000 feet, the air mixing valve and air inlet test port check valve shall close, and the added oxygen ratio shall be as specified (see 3.6.11). Vacuum applied to the pressure breathing test port shall not be applied to the main body of the regulator. With the
32、diluter lever in the 100% oxygen position and a vacuum of 4 inches of water applied to the pressure breathing test port, the leakage from the pressure breathing test port shall be less than 0.02 liters per minute (LPM). 3.5.9 Supply lever coloring. The lever coloring shall conform to figure 1. 3.5.1
33、0 Diluter lever coloring. The lever coloring shall conform to figure 1. 3.5.11 Pressure lever coloring. The pressure lever coloring shall conform to figure 1. 3.6 Performance. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83178C 6 3.6.1 Air
34、 mixing port. An air mixing port shall be provided to mix varying quantities of ambient air with oxygen in specified ratios. A filter equivalent to a mesh screen within a range of 30 to100 mesh, shall be provided to prevent foreign particles from entering the regulator. 3.6.2 Oxygen inlet filter. A
35、30 micron filter shall be provided at the regulator inlet. 3.6.3 Pressure relief device. A replaceable pressure relief device shall be provided to vent excess outlet pressure through the body of the regulator to the atmosphere. The device shall vent 45 liters per minute (LPM) at a pressure not excee
36、ding 2 inches of mercury. The device leak rate shall not exceed 0.02 LPM at a pressure of 17 inches of water. 3.6.3.1 Pressure relief device high temperature exposure. The pressure relief device shall operate as specified after exposure to 250o +5oF. 3.6.3.2 Pressure relief device cycling. The press
37、ure relief device shall operate as specified after being cycled from closed to open and back to closed 50 times. 3.6.4 Pressure breathing test port. The pressure breathing test port (see figure 5) shall be provided with a 20 micron filter. 3.6.4.1 Air inlet test port. A force of 2.5 +1.0 pounds shal
38、l be required to activate the air inlet test port check valve (see figure 5). The air inlet port shall be provided with a cap and tether. 3.6.5 Supply control. 3.6.5.1 Supply lever. A lever shall be provided on the regulator panel to activate the supply valve to shut off the oxygen supply when the r
39、egulator is not in use. The supply lever shall have on and off positions. With the supply lever in the off position, the air mixing port shall be closed. 3.6.5.2 Supply lever activation. The regulator shall operate as specified herein after the supply valve has been cycled from open to closed and ba
40、ck to open 1,000 times. A force of 53 +37 ounces shall be required to move the supply lever to either position. The supply lever shall not stop between the on and off positions (see 6.9). 3.6.6 Diluter control. 3.6.6.1 Diluter lever. A lever shall be provided on the regulator panel to control the ai
41、r mixing port. The air mixing port shall enable the regulator to deliver either diluted oxygen or pure oxygen (see3.6.11). The diluter lever shall have normal oxygen and 100% oxygen positions. 3.6.6.2 Diluter lever activation. A force of 33 +17 ounces shall be required to move the diluter lever to e
42、ither position. Stops shall be provided at the normal oxygen and 100% oxygen positions. The diluter lever shall not stop between the normal oxygen and 100% oxygen positions. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83178C 7 3.6.7 Press
43、ure control. 3.6.7.1 Pressure lever. A lever shall be provided on the regulator panel to ensure that a positive pressure may be obtained at the regulator outlet at altitudes where automatic positive pressure is not delivered. The pressure lever shall have emergency, normal, and test mask positions.
44、3.6.7.2 Pressure lever activation. A force of 33 +17 ounces shall be required to move the pressure lever from the normal to emergency positions. A force of 53 +37 ounces shall be required to move the pressure lever from the normal to the test mask position. When released from the test mask position,
45、 the pressure lever shall return to normal position. The pressure lever shall not stop between emergency, normal, or test mask positions. 3.68 Tester compatibility. The regulator shall meet the test requirements of TO 15X-1-1 using the Tester, Pressure Breathing, Gaseous (PBG) Oxygen Regulator, Fiel
46、d (pneumatic) (see 6.8). 3.6.9 Excess flow characteristics. The regulator shall withstand an excess flow characteristic produced by holding the pressure lever in the test mask position for 2 seconds. 3.6.10 Flow suction characteristics. With either increasing or decreasing suction applied to the out
47、let, the supply Pressure as shown, and the diluter lever in either the normal oxygen or 100% oxygen positions, the outlet pressure required to obtain the listed flow rate at the given pressure altitude range shall conform to table I (see 6.8 and 6.11). 3.6.11 Added oxygen. The ratio (by volume) of o
48、xygen added by the regulator from the oxygen system to total gas delivered through the outlet shall conform to table II (see 6.13). 3.6.12 Pressure breathing characteristics. With either increasing or decreasing flow, and the diluter lever in the normal oxygen position, the pressure breathing characteristics of the regulator shall be within
