1、MIL-C-52153B 43 7797706 027b742 3 U * 2.1.1 Specifications and standards. Unless the following specifications and standards of MIL-C-52153B 25 August 1982 SUPERSEDING MIL-C-5 2 15 3A 2 November 1973 MILITARY SPECIFICATION COMPRESSOR UNIT, RECIPROCATING, POWER-DRIVEN: AIR; 5-CFM, 175-PSI, FOR TESTING
2、 MISSILE PLUMBING SYSTEM This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a 5-cubic-foot-per-minute (cfm), 175-pound-per-square-inch-gage (psig) compressor equipped for testing missile propulsion plumbi
3、ng and associated assemblies. 2. APPLICABLE DOCUMENTS 2.1 Government documents. (see 6.21, - he issue listed in -hat issue of the Department of Defense Index of Specifications and Standards (DODISSI specified in the solicitation, form a part of this specification to the extent specified herein. SPEC
4、 IF ICAT IONS FEDERAL GG-G-91 otherwise specified - Gages, Tire Pressure, Self Contained and Inf lator-Gage, Pneumatic Tire. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US Army Mobility Equi
5、pment Research and Development Command, ATTN: DRDME-DS, Fort Belvoir, VA 22z60 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 4310 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
6、thout license from IHS-,-,-ML-C-52153B q3 977770b O276743 5 E MILITARY MIL-C-3600 MIL-C-13874 STANDARDS MILITARY MI L-STD-12 9 MIL-STD-889 MIL-STD-1188 MIL-STD-1474 MIL-C-52153B - Compressors, Rotary, Power-Driven; and Compressors, Reciprocating, Power-Driven: Air and Gas (Except Oxygen and Refriger
7、ant), Packaging of Power -Driven, Air. - Compressors, Reciprocating and Rotary, - Marking for Shipment and Storage. - Dissimilar Metals. - Commercial Packaging of Supplies and - Noise Limits for Army Materiel. Equipment. (Copies of specifications, standards, drawings, and publications required by co
8、ntractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. The issues of the documents which
9、 are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. NATIONAL FIRE PROTECTION ASSOCIATION National Electrical Code (No. 70). (Application for copies should be addressed to the National Fire Protection Association, 60 Battermarch Str
10、eet, Boston, MA 02110.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 Description. The compressor unit (hereinafter called “compressor“) for testing
11、 missile propulsion plumbing shall consist of an air compressor conforming to MIL-C-13874, type I, class 3, size 5 cfm at 175 psig, with additions and exceptions to MIL-G-13874 as specified herein. tank capacity shall be 30 gallons. 115/230-volt, single-phase, 60 Hertz, power supply. The air receive
12、r The electric motor shall operate on a 3.2 First articles. 3.2.1 Preproduction model. The contractor shall furnish one or more compressors as specified (see 6.21, for examination and test within the time 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS
13、-,-,-I f O O 0 - MIL-C-52153B 43 7977906 027b744 7 MIL-C-52153B frame specified (see 6.21, to prove prior to starting production that his production methods and choice of design detail will produce compressors that comply with the requirements of this specification. Examination and tests shall be as
14、 specified in Section 4 and, unless otherwise specified herein, all examinations and tests shall be conducted by the contractor subject to surveillance and approval by the Government (see 6.3). 6.21, the Government will conduct any or all of the preproduction examinations and tests. When specified (
15、see 3.3 - Cable. The power supply cable shall conform to National Electrical Code, ANSI/NFPA70 including grounding. conductor size not smaller than No. 10 American Wire Gage (AWG), and shall be not less than 50 feet long. ends shall not be terminated. The cord shall be 3-conductor, with the Unless o
16、therwise specified (see 6.21, the cable 3.4 Handle and storage rack. A combination handle and storage rack, similar to that shown on figure 1, (see 6.4), shall be furnished and installed by the contractor. The rack shall hold the cable and air hose specified herein when the cable and air hose are no
17、t in use. The handle and storage rack shall be removable and, when installed, shall not come in contact with any hot components of the compressor. 3.5 Air hose. The air hose shall be fitted at one end with a comercial tire-inflating chuck in lieu of the inflator gage specified in MIL-C-13874. 3.6 Ti
18、re gage. A tire pressure gage shall be furnished conforming to GG-G-91, type II, class A, style 1 or 2. 3.6.1 Gage holder. A means for clamping, hanging, or otherwise securing the The tire gage to the compressor when the gage is not in use shall be provided. gage holder shall be-located near the air
19、 hose rack in an accessible location. 3.7 -Air pressure regulator. The air-pressure regulator for adjusting the air pressure shall be of the hand-screw type, shall pass 10 cfm of air at 175 psig, and shall provide a minimum adjus table- regulated- air-pressure range of from O to 175 psig. The regula
20、tor shall have anticreepage characteristics to permit a regulated air pressure to be maintained with not more than a 2-psig pressure increase when the regulator is subjected to an inlet supply of 200 psig for a period of 5 minutes with no air flowing through the inflator hose. regulator shall withst
21、and, without damage, inlet supply pressures up to and including 200 psig. zinc, aluminum, or other corros ion-res is tant me tal. The The body of the regulator shall be made of brass, bronze, 3.7.1 Air pressure gages. The air receiver and the air pressure regulator shall each be equipped with a O- t
22、o 250-psi gage. 1/4-inch male NPT. black enamel finished. The dial shall be not less than 2 inches in diameter. The gages shall be shock mounted. The gage inlet shall.be The case shall be steel, zinc coated or phosphate treated, 3.8 Dehydrator. A dehydrator shall be furnished and installed by the co
23、ntractor. the nonregenerative type. Unless otherwise specified (see 6.21, the dehydrator shall be of 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-52L53B 43 777770b 0276745 7 I MIL-C-5 2 153B 3.8.1 Dehydrator capacity. While the compressor
24、 is operating in ambient conditions of plus 120“ F plus or minus 5“ F and a relative humidity of 36 percent (180 grains of water per pound of air), the dehydrator shall dry not less than 5 cfm of free air for a period of not less than 6 hours to a level not in excess of minus 40“ F free air dew poin
25、t. change of dessicant shall be required. During the 6-hour period, no 3.8.2 Moisture separator. The dehydrator-inlet shall be equipped with a moisture separator. foreign matter from entering the dehydrator. shall be provided and shall not require operation more often than once every 1/2 hour at a r
26、elative humidity of not less than 36 percent at plus 120 F plus or minus 5“ F. heater element to prevent the freezing of accumulated moisture at ambient temperatures of minus 25“ F to plus 32“ F. The heater element shall be rated at 115/230-volts, 60 Hertz,Ialternating current. The air pressure drop
27、 through the moisture separator shall be not more than 10 psig. The moisture separator shall prevent oil, water, and other A manually operated drain valve The filter shall be provided with a thermostatically controlled 3.9 Sound level. The sound level of the compressor while it is operating at full
28、speed, shall be in accordance with MIL-STD-1474, Category D for -. steady-state-noise when tested in accordance with 4.5.3. the compressor at the microphone location and conditions exceeds 85 dB(A), the distance from the compressor at which a limit of 85 dB(A) is met shall be determined. of each pro
29、duction compressor, stating: “Caution, hearing protection required within feet when equipment is operating.“ the distance shown on the hazard sign. Hearing protectors need not be supplied with the compressor. the appropriate discussion of the noise hazard in accordance with MIL-STD-1474, including t
30、he hearing protection, the noise level of the item, and the distance from the compressor at which the 85 dB(A) limit is met. If the sound level of That distance shall be shown on hazard signs mounted on both sides The caution shall be legible from When the caution notice is required, manuals shall i
31、nclude 3.10 Dissimilar Metals. Dissimilar metals as defined in MIL-STD-889 shall not be used in intimate contact with each other unless the metals are protected against galvanic corrosion (see 6.7). 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the
32、contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein, in the contract or order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disa
33、pproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified i I -p- Provided by IHSNot for R
34、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-52L53B q3 7797706 0276746 O = MIL-C-52153B 4.1.1 Component and material inspection. The contractor is responsible for insuring that components and materials used are manufactured, examined and e tested in accordance with
35、 ref erenced specif ications and standards. 4.2 Classification of inspection. Inspection shall be classified as follows: (a) Preproduction inspection (see 4.3). (b) (c) Inspection comparison (see 4.6). (d) Inspection of packaging (see 4.7). Quality conformance inspection (see 4.4). 4.3 Preproduction
36、 inspection. The preproduction compressor(s) shall be tested as specified in 4.5 in addition to the examinations and tests specified in MIL-C-13874. 4.4 Quality conformance inspection. Each production compressor shall be subjected to quality conformance inspection as specified in MIL-C-13874. 4.5 Te
37、sts. 4.5.1 Dehydrator. 4.5.1.1 Dehydrator capacity. The compressor shall be operated at ah ambient temperature of 120“ F plus or minus 5“ F and a relative humidity of not less than 36 percent-for a period of not less than 6 hours. The dehydrator-inlet moisture separator shall be drained at intervals
38、 of not less than 1/2 hour. following data shall be taken at 1-hour intervals: The 0 (a) Compressor crankshaft speed, in revolutions per minute. (b) Discharge pressure measured at the dehydrator outlet, in psig. (cl (d) Ambient air temperature in degrees Fahrenheit, humidity in percent, and pressure
39、 in inches of mercury. Dryness of air produced in degrees Fahrenheit, free air dew point. The dryness should be measured with a hygrometer of the dial indicating, coulometric, electrolytic type. 4.5.1.1.1 Failure criteria. One or more of the following shall constitute failure of this test: (a) Compr
40、essor crankshaft speed in excess of contractors recommended (b) (cl. Inability of the dehydrator to dry 5 cfm of free air to the dryness continuous operating speed. Discharge pressure less than 200 psig. specified herein at the conditions specified. Provided by IHSNot for ResaleNo reproduction or ne
41、tworking permitted without license from IHS-,-,-MIL-C-52153B 4.5.1.2 Dehydrator. Two 200 psig test gages shall be installed on the moisture separator, one on the inlet side and one on the outlet side. With the compressor operating, the air receiver discharge valve shall be opened until an air pressu
42、re of 175 psig is maintained. the inlet and outlet gages shall then be recorded. IO psig shall constitute failure of this test. The difference in indicated pressure on A pressure drop of more than 4.5.1.2.1 Valve and heater. The compressor shall be operated at a temperature of minus 25 F plus or min
43、us 5“ F for a period of not less than 6 hours. At the end of this period, the drain valve shall be opened. Failure of moisture or air to be discharged or inability of the valve to operate shall cons titute failure of this tes t. 4.5.2 Regulator. 4.5.2.1 Leakage. With the air receiver pressure at 200
44、 psig and the air hose and chuck connected to the regulator, the air receiver discharge valve shall be opened and the air pressure shall be adjusted to 175 psig. Any leakage of air from the chuck, hose, or regulator shall constitute failure of this test. 4.5.2.2 Regulator creep. The air-pressure reg
45、ulator outlet shall be connected so as to discharge into another air receiver (the air receiver tank of a similar unit may be used, with the air hose as the connecting medium), pressure of not less than 200 psig shall be maintained on the air receiver of the compressor being tested. The pressure reg
46、ulator shall be adjusted to 20 psig delivery pressure for a 51ninute period. An increase in pressure of more than 2 psig at the end of the 5-minute period shall constitute failure of this test. The test shall be repeated for 75 and 150 psig. An air 4.5.3 Sound level. Place the compressor in a test a
47、rea which is free of any With the compressor operated at rated load, a sound level large reflecting surfaces within 50 feet of the compressor or sound-level measuring equipment. survey shall be made around the compressor to determine the direction in which the maximum sound levels are propagated so
48、that the test equipment can be properly oriented. with MIL-STD-1474, Category D. compressor operated at no load and rated load. of 3.9 shall constitute failure of this test. The recording microphones shall be positioned in accordance The noise level shall be measured with the Failure to meet the req
49、uirements 4.6 Inspection comparison. The Government may select compressors at any the during the contract production period and subject these compressors to the examinations and tests specified in 4.5 or MIL-C-13874 for inspection comparison to determine conformance to the requirements of this specification. The inspection will be performed by the Government, at a site selected by the Government, on units selected at random from those which have been accepted by the Government
