1、s MIL-C-45334C 25 m 7777706 0425718 7 W . .u! :.A 7 July 1981 MIL-C-45334B 5 May 1966 MILITARY SPECIFICATION COMPRESSOR ASSEMBLIES, AIRBRAKE SYSTEM; WHEELED VEHICLE This.specification is approved for use by all Departments and Agencies of the Department of Defense. 1, SCOPE 1.1 Scope. This specifica
2、tion covers eight types of air compressors for airbrake systems of military wheeled vehicles. This specification also covers compressor accessories requiring qualification (see 6.1). 1.2 Classification. 1.2.1 Reciprocating compressors. Reciprocating compressors shall be of the following types, with
3、normally rated displacement in cubic feet per minute (cfm) at 1250 revolutions per minute (rpm), as specified (see 6.2): Type 1 Type II - 12 cfm, air-cooled, engine-lubricated, Type III Type IV - 12 cfm, water-cooled, engine or 5ee v - 24 cfm, water-cooled, engine or - 7 1/4 cfm, air-cooled, engine-
4、lubricated, reciprocating compressor. reciprocating compressor. self-lubricated, reciprocating compressor. self-lubricated, reciprocating compressor. self-lubricated, reciprocating compressor. - 7 1/4 cfm, water-cooled, engine or Beneficial comments (recommendations, additions, deletions) and any pe
5、rtinent data which may be of use in improving this document should be addressed to: US Army Tank-Automotive Command, ATTN: DRSTA-GSS, Warren, MI 48090, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. FSC 25
6、30 Obtained From GLOBAL ENGINEERING DOCUMENTS 2625 So.Hickory St. Santa Ana, CA 92707 (71 41540-9870; (8001854.71 79 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _ MIL-C-45334C 25 = 7777906 0425737 7 W 1.2.2 Rotating compressors. Rotating compres
7、sors shall be of the follow- ing types, as specified (see 6.2): Type VI Type VI1 Type VI11 - Nominal rating of 9 cfm at 1850 rpm, air-cooied, - Nominal rating of 9 cfm at 1850 rpm, water- - Nominal rating of 12 cfm at 1550 rpm, water- engine-lubricated, rotary compressor. cooled, engine-lubricated,
8、rotary compressorr cooled, engine-lubricated, rotary compressor. 2. APPLICABLE DOCUMENTS 21 Issues of documents. The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS FE
9、DERAL PPP-T-42 PPP-T-76 NN-P-530 PPP-B-585 PPP-B-591 PPP-B-601 PPP-B-62 1 PPP-B-636 - Tape, Packaging/Masking , Paper. - Tape, Packaging, Paper (for Carton Sealing). - Plywood, Flat Panel. - Box, Wood, Wirebound. - Box, Fiberboard, Wood-cleated. - Box, Wood, Cleated Plywood. - Box, Wood, Nailed and
10、Lock Corners. - Box, Shipping, Fiberboard. MILITARY MIL-P-116 - Preservation, Packaging, Method of. MIL-B-121 MIL-L-2104 MIL-A-13488 MIL-F-13927 MIL-C-16 173 MIL-L-21260 MIL-E-52798 MIL-E-52835 - Barrier Material, Greaseproofed, Waterproofed, - Lubricating Oil, Internal-combustion Engine, - Air Clea
11、ner, Engine, Heavy-duty, Oil-bath Type. - Fungus Resistance Test; Automotive Components. - Corrosion Preventive Compound, Solvent Cutback, - Lubricating Oil, Internal-combustion Engine, - Enamel, Alkyd, Camouflage. - Enamel, Modified Alkyd, Camouflage, Lusterless. Flexible . Heavy-duty. Cold-applica
12、tion. Preservation and Break-in. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-45334C 25 STANDARDS FEDERAL FED-STD-H28/2 - MILITARY MIL-STD-105 - MIL-STD-129 MIL-STD-130 MIL-STD-202 MIL-STD-810 MIL-STD-1186 MIL-STD-1188 MS51322 MS5 3005 MS
13、53006 MS53032 MS53067 m 7777906 0425720 5 m MIL-C-45334C Screw Thread Standards for Federal Services. Sampling Procedures and Tables for Inspection Marking for Shipment and Storage. Identification Marking of US Military Property. Test Methods for Electronic and Electrical Environmental Test Methods.
14、 Cushioning, Anchoring, Bracing, Blocking, and Waterproofing, with Appropriate Test Methods. by Attributes. Component Parts. Commercial Packaging of Supplies and Equipment. Compressor, Reciprocating, Power Driven - Air Cooled, 7 1/4 CFM w/Unloader. Air Cleaner, Intake-compressor. Governor Assembly -
15、 Air Brake for Tactical Vehicles. Compressor, Reciprocating, Power Driven - Air Cooled, 12 CFM w/Unloader. Evaporator, Alcohol - Air Brake System. (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obta
16、ined from the procuring activity, or as directed by the contracting officer .) 3 REQUIREMENTS 3.1 Qualification requirements. 3.1.1 Compressor assembly. Compressors furnished under this specifi- cation shall be products which have been tested and have passed the qualifica- tion tests specified herei
17、n, and have been listed on, or approved foi listing on, the applicable qualified products list (see 4.4 and 6.4), 3.1.2 Compressor accessories requiring qualification. Accessories re- quiring qualification furnished under this specification shall be products which have been tested and have passed th
18、e qualification tests specified here- in, and have been listed, or approved for listing, on the applicable qualified products list (see 4.4 and 6.4). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-q533gC 25 m 9999906 OL12572L 7 m 3.1.2.1 Sub
19、mitted individual compressor accessories to be qualified. An individual accessory submitted for qualification, which has not been contained in a compressor assembly already qualified, shall be qualified as follows: Testing of the governor shall be accomplished by subjecting the governor to the speci
20、fied tests (see 4.4). The governor shall be considered qualified when applicable requirements for governor have been met. cleaner shall be accomplished by subjecting the air cleaner assembly to the- specified tests (see 4.4). applicable requirements for air cleaner have been met, Testing of the air
21、The air cleaner shall be considered qualified when 3.2 Materials. Materials shall be.as specified herein and in referenced specifications, standards and drawings. Material shall be free of defects which adversely affect performance or serviceability,of the finished product (see 6.5). 3.3 Design and
22、construction. The design and construction of compressors and accessories shall conform to the following standards, or drawings as specified (see 6.2): Type I compressor - MS51322 Type II compressor - MS53032 Air cleaner for types I and II compressors - MS53005 Governor for types I and II compressors
23、 - MS53006 3.3.1 Threaded parts. Ail screw threads shall conform to FED-STD-H28/2. The form, number per inch, and class of threads shall be as specified on applicable standards or drawings. 3.3.2 Standard parts. Military standard parts shall be incorporated when- ever applicable. Commercial standard
24、 parts may be used provided they meet or exceed the requirements of all applicable Military Standards and Specifica- tions with respect to fit and function. 3.3.3 Qualified products. The contractor shall be responsible for using Darts and assemblies from Qualified Products Lists (QPLs) whenever avai
25、lable. Contractors inspection records shall list all QPL items by number and date of the QPL, name of supplier and part or drawing number(s). assemblies are approved as qualified products, but not yet listed on the QPL, the contractor shall list the products by number and date of the approved doc- u
26、ment and name of supplier(s). When parts and 3.4 Performance . Compressor assemblies, governors, and air cleaners shall conform .to the- following performance requirements, as applicable: Compressors 3.4.1 and 3.4.4 Governors 3.4.2 and 3.4.4 Air cleaners 3.4.3 and 3.4.4 Provided by IHSNot for Resale
27、No reproduction or networking permitted without license from IHS-,-,-n MIL-C-45334C 25 a 777770b 0425722 7 W 3.4.1 Compressor performance. 3.4.1.1 Power input. Power input to the compressor under designated load and speed conditions, shall not exceed that specified in table I, or the applicable draw
28、ing or standard (see 3.3). TABLE I. Maximum horsepower input. Speed Types Spes 5Pe Types Type Load rpm. I and III II and IV V VI and VI1 VI At 100 psig 2400 3.25 4.75 7 .O 4.3 6 .b- Unloaded 2400 1.5 2.25 2.75 1.3 1.4 3.4.1.2 Oil flow. Oil flow at 1775-1825 rpm, and 37.5 psig, shall not exceed 650 c
29、ubic centimeters (cc) per minute for types I and III compressors, 1000 cc per minute for types II, IV and V compressors, and 400 cc per minute for types VI, VI1 and VIII compressors. 3.4.1.3 Discharge air temperature. Discharge air temperature, measured at the compressor discharge fittings, shall no
30、t exceed the inlet air temperature by more than that specified in table II. TABLE II. Discharge air temperature. Speed Maximum discharge air temperature above the intake air temperature, OF r pm Types I, III, VI and VI1 Types II, IV, V and VIIr“ 600 150 195 1200 225 295 1800 305 375 2400 350 435 3.4
31、.1.4 - Life. specified in table VII, with load conditions, in alternate 24 hour periods, at no-load and 100 psig. shall not exceed 5 cc per hour for types I, II, III and IV, 10 cc per hour for type V, 16 cc per hour for types VI and VII, and 20 cc per hour for type VIII. Bearing wear or burnout, oil
32、 or air leakage, or distorted parts, considered detrimental to the continued operation of the compressor, shall be cause for discontinuance of the life test. Compressor shall withstand 1000 hours of operation as The rate of oil consumption during any 100-hour period 3.4.1.5 Pressure buildup time. Th
33、e pressure buildup time from O to 100 psig shall not exceed that specified in table III. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-45334C 25 777770b 0425723 O H MIL-C-45334C TABLE III. PresBure buildup time. Speed Time, seconds per 1000
34、 cubic inches rpm Type I and III Type II and IV Type V Type VI and VI1 Type VI11 600 105 67 36 129 87 1200 55 33 17 50 36 1800 40 24 13 33 24 2400 35 21 11 26 20 3.4.2 Governor performance. 3.4.2.1 Pressure settings. Pressure settings shall be as specified on the applicable standard or drawing. plus
35、 or minus 5 percent from specified values. Average pressures shall not vary more than 3.4.2.2 Life. The governor shall withstand 100,000 cycles of cut-in and cut-out operation. 3.4.3 Air cleaner performance. 3.4.3.1 Air flow restrictions. The static pressure drop across the air cleaner shall not exc
36、eed 12 inches of water at rated air flow of applicable compressor. 3.4.3.2 Efficiency. The efficiency of the air cleaner shall not be less than 95 percent (see 4.6.3.3). 3.4.3.3 Dust capacity. The air cleaner shall have a minimum dust capacity of 15 grams of course dust, without exceeding a restrict
37、ion of 20 inches of water (see 4.6.3.4). 3.4.4 Environmental requirements. For fungus resistance, corrosion resis- tance, vibration, and shock testing, accessories may be installed on the com- pressor and tested as a single unit. 3.4.4.1 Fungus resistance. Compressor, governor, and air cleaner shall
38、 exhibit no deterioration after undergoing procedure specified in MIL-I?-13927 for class 2 items, except the performance tests shall be conducted after 90 days only. 3.4.4.2 Corrosion resistance. Compressor, governor, and air cleaner shall exhibit no corrosion after undergoing procedure specified in
39、 method 101 of MIL-STD-202, except length of test shall be 200 hours. 3.4.4.3 Vibration resistance. Compressor, governor, and air cleaner shall operate as in intended use after undergoing procedure specified in method 201, HIL-STD-202, except total time of test shall be 72 hours. 6 Provided by IHSNo
40、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-C-45334C 25 W 7777906 0425724 2 W. 3.4.4.4 Shock resistance. Compressor, governor, and air cleaner shall operate as in intended use after undergoing procedure specified in method 516 of MIL-STD-810. 3.5 Finish. Un
41、less otherwise specified, all exterior metal surfaces, other than the shaft and mounting flange, shall be treated and painted in accordance with the standard practice of the manufacturer. When specified (see 6.2), the finish coat shall be forest green enamel as specified in MIL-E-52798, or MIL-E-528
42、35. 3.6 Identification markings. The complete compressor and each major component shall be marked as specified on applicable drawings or, if not so specified, in accordance with MIL-STD-130. 3.7 Workmanship. Workmanship shall assure a product free of burrs, scratches, sharp edges, chips, or defects
43、which will affect performance or serviceability. to operating or maintenance personnel. No condition shall exist that might present a safety hazard 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the per
44、formance of all inspection requirements specified herein. the contractor may use his own or any other facilities suitable for the per- formance of the inspection requirements specified herein, unless disapproved by the Government. inspections set forth in the specification where such inspections are
45、 deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified in the contract, The Government reserves the right to perform any of the 4.1.1 Materials. Contractors inspection records shall be examined to determine conformance to 3.2 and 3.3. 4.2
46、Classification of inspections, Inspection requirements specified herein are classified as follows: a. Qualification inspection (see 4.4). h. Quality Conformance inspection (see 4.5). 4.3 Inspection conditions. Unless otherwise specified herein, tests shall be conducted at (or corrected to) an ambien
47、t intake air temperature of 77“ - + SF, and barometric pressure of 29.42 + .50 inches of mercury. The com- pressor shall be lubricated during the-test with oil conforming to MIL-L-2104, grade 10. For air-cooled compressors, cooling air supply shall be from a 7 t/2 inches wide, by 9 1/2 inches high,
48、rectangular discharge, placed 10 + 1/2 inches from the compressor on the discharge side. The compressor cyinder head shall be centered in the upper half of the cooling airflow. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-45334C Cooling ai
49、rflow shall impinge on the compressor at an angle of 45 degrees to the crankshaft at the pulley end. For water-cooled compressors, cooling watet: shall be supplied at a temperature of 180F + 5F. at a flow of two gallons per minute (gpm) for types III and VII, 2 1/4 gpm for types IV and VIII, and 4 gpm for type V. Coolant shall be supplied 4i4 Qualification inspection (see 6.4). A qualification sample of three compressors of each t
