1、MIL-P-23504 43 m 7777706 0274247 7 m - ,y - - - i9 November i962 MILITARY SPECIFICATION PUMP ,VACUUMt COMPOUND , ROTARY, MOTOR DRIVEN, 12 CFM This specification has been approved by the Bureau of Naval Weapons, Department of-the Navy 1. SCOPE -1.1 Scope: This specification covers one type of 12 CFM,
2、 electric motor driven, compound, rotary, vacuum pump for liquid oxygen tank servicing. 2. APPLICABLE DOCUMENTS 2.1 Invitation for Bids, form a part of this specification: The following documents, of the issue in effect on the date of SPECIFICATION FEDERAL QQ-P-416 TT-E-485 TT-E-489 PPP-B-585 PPP-B-
3、601 PPP-B-621 TT-P-636 CC-M-641 TT-T-656 PPP-B-591 - Plating, cadmium (electro deposited) - Enaml, semi gloss, synthetic - Enamel, gloss, synthetic, for exterior and interior surfaces - Boxes, wood, wirebound - Boxes, fiberboard, wood-cleated - Boxes, wood, cleated-plywood - Boxes, wood, nailed and
4、lock-corner - Primer coating, synthetic, wood and ferrous metal - Motor, alternating current (integral horse power) - Tricresyl Phosphate MILITARY JAN-P-100 - Packaging and packing for overseas shipment, . MIL-P-116 - Preservation, methods of MIL-C-490 MIL-M-3171 - Magnesium, alloy, processes for co
5、rrosion pro- MIL-E-4970 - Environmental testing, ground support equipment, general specification - Cleaning and preparation of ferrous and zinc coated surfaces for organic protective coatings tection of general specification for Provided by IHSNot for ResaleNo reproduction or networking permitted wi
6、thout license from IHS-,-,-MIL-P-2350Y L13 M 9999906 OZ7L1S50 5 1.IIL-c u 591 14IL-C-652g MIL-1-6866 NIL-1-6868 I.IPL-A-8421 n%-!3-8 512 - Surface treatments (except priming and painting) - Chemical films for aluminum and aluminum alloys = Corrosion-preventive compound, aircraft engine - Inspection,
7、 penetrant method of - Inspection process, magnetic particle - Air transportability requirements, general - Sgpport equipment, aeronautical, special, general - Primer, zinc-chromate, for aircraft use - Box, wood cleated, veneer, paper overlaid - Interference limits, tests and design require- ments,
8、aircraft, electrical and electrical equipment for metal and metal parts in aircraft , specification for specification for the desig of 595 - Colors 14ILZTARY 1KL-STD-E29 - Marking for shipment and storage MIL-STD-130 - Identification Karking for U. S. Military Property AIR FORCE-NAVY ABOttAUIICAL AN
9、6235 AN6236 - Filter Element, hydraulic replaceable, micronic - Filter Element, hydraulic replaceable, micronic line type reservoir type PUBLICATION AIR FORCE-NAVY AERONAUTICAL BULLZTIN 143 - Specifications and Standards; use of (3ihen requesting specifications, standards and publications refer to b
10、oth the title and number. application to the Commanding Officer, Kaval Supply Depot, 5801 Tabor Avenue, Philacielphia 20, Penna., Attention, Code CDS) , 2.2 Other Publications: The following docuxent forms a part.of this specification. Copies of applicable specifications may be obtained upon Unless
11、otherwise indicated, the issue in effect on date of 2 .- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-invitation for bids shall apply: AMERICAN SOCIETY OF MECHANICAL ENGINEERS 19.5:4 - Supplement on Instruments and Apparatus, Part 5, -Chapter 4, F
12、low Measurement by Means of Standardized Nozzles and Orifice Plates l. (Copies of the ASME power test code may be obtained from the American Society of MechaniGa1 Engineers, 29 Vest 39th St., New York 18, N. Y, ) 3. REQUIREMENTS 3.1 Preproduction: This specification makes provisions for preproductio
13、n testing. 3.2 components: Components: The vacuum pump shall consist of the following major See Description Requirement (a) Power Plant (b) Vacuum Pump (c) Servicing Line (d) Cabinet (e) Base and Suspension (f) Accessories 3 .? .3.8 3 *9 3.10 3.11 3.12 3.3 Selection of Specifications and Standards:
14、Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with Bulletin 143. 3.4 Mat er ia1 s 3.4.1 Protective Treatment: When materials are used in the construction of the vacuum pump that are subject to deterioration when exposed to cl
15、imatic and 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 specification. The use of any protective coating that will crack, chip, or scale w
16、ith age or extremes of clinatic and environmental conditions shall be avoided, 3.4,2 Gasketina and Insulating Materials: Rubber or similar gasketing and insulating materials shall be compounded to insure their resistance to the tricresyl phosphate pump lubricant and to withstand the environmental re
17、quirements. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.4.3 Combustible Elaterial: Combustible materials shall be avoid 3 in internal construction where high purity oxrity oxygen may concentrate during normal ope rat ion. 3.5 The vacuum pump sh
18、all be designed and con- structed in accordance with a11 applicable requirements of Military Specifica- tion l.lL.=S-8$L2B including the air transportability requirements, except where they conflict with the detail requirements of this document. a conflict the requirements of this specification shal
19、l govern. Resign and Construction: In the event of 3.5.3- siqned for the purpose of evacuating the vacuum-tiqht annular insulating space of liquid oxygen or nitrogen storage tanks to absolute pressures of 10 microns Ilg, or less. 3.5.2 enclosed in a cabinet suitable for providing adequate protection
20、 from environmental conditions. shall. be located and installed on the base to permit their being removed without removing other components The vacuum pump shall be an independent, self-contained unit de- I!ourltinp,: The vacuum pump shall be mounted on a sturdy base and Insofar as practicable, all
21、individual components 3.5.3 equipped with locking devices. Safety wire, self-locking nuts, and cotter pins are acceptable. Lscking Devices: All screws, pins, bolts, et cetera, shall be 3.6 quirements specified herein. Performance: The vacuum pump shall be capable of meeting the re- 3.6.1 Capacitx 3.
22、6.1.1 be such that when it is operating at rated speed with both inlet and dis- charge connections open to atmospheric pressure, the quantity of air or other gases pumped through shall be in excess of 12 cfm measured at ambient temper- ature and pressure. 3.6.1.2 pressuras shall be such that when it
23、 is operating at rated speed in an ambient temperature of +70F with the inlet pressure constant at 100 microns ig, and the discharge open to atmospheric pressure, the quantity of air or other gases pumped through shall be not less than 11 cfm measured at inlet pressure and temperature conditions. Fr
24、ee Air Pumping: The free air capacity of the vacuum pump shall Reduced Fressure: The capacity of the vacuum pump at reduced 3.6.1.3 When operating at rated speed in an ambient tem- pvrature of +70F with the inlet completely blanked off except for a connec- tion te, an absolute pressure measuring dev
25、ice and the discharge open to atmospheric pressure, the vacuum pump shall be capable of attaining and hold- ine an absolute pressure of less than 1.0 microns Hg. 3.6.2 Ultimate Vacuum: Operating Time: The vacuum pump shall be capable of continuous Provided by IHSNot for ResaleNo reproduction or netw
26、orking permitted without license from IHS-,-,-MIL-P-23504 L13 H 7377706 0274253 O H MIL-P-23404(Wep ) operation under any of the conditions specified in paragraph 3.6.1 for periods of not less than 24 hours without requiring shutdown for servicing or maintenance . 3.6.3 Environmental. Conditions 3.6
27、.3.1 ating in any ambient temperature between the limits of +lye and +130F. Temperature Operation: The vacuum pump shall be capable of Oper- 3.6.3.2 standing, without damage, storage at any temperature from -80 3.6.3.3 storage in any humidity conditions up to 95 percent relative humidity at 130% 3.6
28、.3.4 fungus encountered at locations in tropical and subtropical climates. 3.6.3.5 operation in an atmosphere containing salt-laden moisture. Temperature Exposure: The vacuum pump shall be capgble of wi: 6 inch heavy duty flexible vacuum hoses suit- able for use at absolute pressures of 10 microns H
29、g or lese shal be supplied. One hose shall be at least 1-3/8 inches inside diameter and shall exceed the inside diameter of the pump end inlet connection, paragraph 3.8.5. The second hose shall be l-inch inside diameter. The l-inch inside diameter hose shall have an adapter to pernit coupling to the
30、 filter inlet fitting. 3.9.6 end coupling in accordance with Figure loa. with an end coupling in accordance with Figure 1.b. The pump shall be sup- plied complete with the l-inch I.D. hose installed, An instruction plate shall be attached to the pump in a prominent location indicating that the lar a
31、ccuracy of dimensions, radii of fillets, and marking of parts and assemblies; thoroughness of soldering, welding, brazing, painting, wiring and riveting; alignment of parts and tightness of assembly screws and bolts; et cetera. 3.17.2 Dimensions: Dimensions and tolerances not specified shall be as c
32、lose as is consistent with the best shop practices. Where dimensions and tolerances may affect the interchangeability, operation, or performance of the vacuum pump or any of its components, they shall be held or limited accordingly. 3.17.3 Screw Assembies: Assembly screws and bolts ,shall be tight.
33、The word tight means that the screw or boltxannot be appreciably tfghtened further without damage or injury to the screw, bolt, or threads. 3.17.4 Riveting: Riveting operations shall be carefully performed to insure that the rivets are tight and satisfactorily headed. 3.17.5 spattered, or excess sol
34、der, metal chips, and other foreign material re- moved during and after final assembly. 4. QUALITY ASSURANCE PROVISION Particular atten- Cleaning: The vacuum pump shall be thoroughly cleaned, and loose, 4.1 Testink Responsibility: Unless otherwise specified herein the supplier is responsible for the
35、 performance of all inspection requirements prior to submission for official inspection and acceptance, shall utilize his own facilities or any commercial laboratory acceptable to the Government for conducting the specified tests. of the examination and test shall be kept complete and available to t
36、he Government as specified in the contract order. All test equipment necessary for conducting tests in accordance with this specification shall be supplied by the Contractor. The contractor Inspection records 4.1.1 Notification: The Contractor shall notify the Government Inspec- tor and the Chief of
37、 the Bureau of Naval Heapons (SEQ) 30 days prior to presenting the preproduction model for tests so that the Government Repre- sentative may witness all tests. 4.2 unit (hereinafter referred to as the unit) shall be classified as follows: Classification of Tests: The inspection and testing of the pu
38、mp (a) Preproduction Tests (b) Acceptance Tests 4.2.1 Preproduction Tests: Preproduction tests shall consist of all the tests in Section 4.4 “TEST METHODS“ : 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-23504 Li3 m 949790b 0S7LiZbO 4.2.2
39、Acceptance Tests: The acceptance tests shall consist o following: the (a) Individual Tests (b) 4.2.2.2 Individual. Tests: following tests as described under 4.4 : (a) Examination of product . . , . . . , , , ,See 4.4.1 (b) Mechanical inspection . . . . . . . . . See 4.4.2 (c) Functional check , . ,
40、. , , . , , . , . .See 4,4.3 (d) Operational check . . . . . . , . . . . . . See 4.4.4 Periodic sampling plans and tests Fach vacuum pump shall be subjected to the 4.2.3 4.2.3.1 every fifty or fraction thereof produced and subjected to the tests specified in 4.4#7. Periodic Sampling Plans and Tests
41、Sampling Plan: One vacuum pump shall be selected at random from 4,2,3,1.1 duction run fails to meet the specification, vacuum pumps still on hand or later produced shall not be accepted until the extent and cause of failure are determined, Rejection and Retest: When one vacuum pump selected from a p
42、ro- 4,2.3.1.2 Individual Tests May Continue: For operational. reasons, individ- ual tests may be continued pending the investigation of a sampling test failure, Final acceptance of vacuum pumps on hand or produced later shall not be made until It is determined that the vacuum pumps meet all the requ
43、irements of the specification, 4.2,3,1,3 Defects in Vacuum Pumps Already Accepted: The investigation of a test failure could indicate that defects may exist in vacuum pumps already accepted. If so, the contractor shall fully advise the procuring activity of all defects likely to be found and methods
44、 of correcting them, 4.3 Test Conditions 4.3.1 Apparatus: Insofar as practicable, apparatus used in conjunction with testing prescribed herein shall be of laboratory precision type and shall be calibrated at intervals properly spaced to assure laboratory accuracy, 4.3.2 Instrumentation 4.3.2.1 Press
45、ures: Wherever practicable, pressures and pressure differen- tials shall be measured by means of liquid manometers. the ranGe of conventional liquid manometers shall be measured by means of properly calibrated Bourdon-tube gages, type having a dial diameter of not less than 4 inches. Pressures excee
46、ding Such gages shall be of laboratory 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3.2.1.1 measured with closed-type manometers providing readings independent of pre- vailing barometric conditions. 4.3.2.1.2 suitably calibrated instruments d
47、esigned to read total pressures (including both permanent gases and condensble vapors). calibration to show compliance with 4.3.3 through 4.3.3.8 shall be included as part of the test report specified in paragraph 4.5.2. Pressures in the range from 1 to 100 mm Hg absolute shall be Absolute pressures
48、 below 1mm Hg shall be measured by the use of A certificate of instrument 4.3.2.1.3 calibrated mercurial or aneroid barometer. Barometric pressures shall be measured by means of a properly 4.3.2.2 Temperatures: Temperatures shall be measured by means of appropriately located thermometers or thermoco
49、uples used with suitably Cali- brated potentionometetxi. Temperatures shall be expressed in degrees Fahren- heit . 4.3.2.3 Airflow 4.3.2.3.1 standardized nozzles or orifices as prescribed in ASME Code 19.5:4. The rate of airflow shall be reported in terms ofthe actual volume occupied under the existing ambient Conditions. Airflow for free air displacement tests shall be measured with 4.3.2.3.2 vacuum conditions, airflow into the evacuated container (if
