NAVY MIL-S-21920 C-1975 SWITCH HYDROSTATIC MARK 41 MODS 0 AND 1《MARK 41 MODS 0 和 1液压开关》.pdf
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1、MIL-S-21720C 23 W 777770b 0301806 7 11 July 1975 SUPERCEDING MIL-S-21920B(OS) 15 September 1969 MILITARY SPECIFICATION SWITCH, HYDROSTATIC, MARK 41 MODS O AND 1 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1 SCOPE 1.1 This specification establi
2、shes the requimmnts for the procurement of the Switch, Hydrostatic, Mark 41 Mods O and 1, Naval Sea Systems Ccmmand LD 299449 and PL 3212233, respectively. 2 APPLICABLE DOCUMENTS 2.1 or request for proposal, form a part of this specification to the extent specified herein. STANDARDS -. The following
3、 documents, of the issue in effect on the date of invitation for bids MILITARY MIL-STD-105 MIL-STD-129 MIL-STD-331 MIL-STD-454 Sampling Procedures and Tables for Inspection by Ateibutes Marking for Shipment and Storage Fuze and Fuze Components, Ehvironmental and Performance Tests for Standard Genera
4、l Requirements for Electronic Equipment DRAWINGS NAVAL SEA SYSTEMS COW (Code ident 10001) LD 299449 PL 3212233 DL 2644484 Switch, Hydrostatic, Mark 41 Mod O Switch, Hydrostatic, Mark 41 Mod 1 Shipping (Packing) Condition Hydrostatic Switch All drawing numbers referenced herein are Listed on LD 29944
5、9 or PL 3212233 unless otherwise desiguated. PUBLICATIONS NAVAL SE% SYSTEMS COMMAND WR-43 Naval Weapons Requirements, Preparation of Quality Assurance Requirements 2.2 ihloss otherwise indicated, the issue in effect on the date of invitation for bids or request fcm prpposal shall apply. Mher publica
6、tions. The following document forms a p (b) sea side down; (c). switch axis horizontal. 3.5 Environmental requirements. 3.5.1 teristics of this specification after being vibrated in accordance with 4.8.1. 3.5.2 characteristics of this specification after being shocked in accordance with 4.8.2. All f
7、our switch circuits shall remain open at all pressures below All four switch circuits shall remain open at all pressures below Contact resistance. The contact resistanee of each switch circuit, with the switch Operating position. Unless otherwise specified, the switch shall operate in a (a) sea side
8、 Vibration. The switeh shall meet all performance requirements and product charac- Shock. The.hydrostatic switch shall meet all performance requirements and product 3.5.3 Temperature. 3.5.3.1 The hydrostatic switch shall operate in a manner to meet all performance requirements and product characteri
9、stics of this specification at any temperature be- tween -3OC and 34OC (26OF and 93OF). 3.5.3.2 hydrostatic switch shall withstand without damage one i?-day JAN TEMPERATURE AND HUMIDITY CYCLE defined in MIL-STD-331, Test Hethod 105, except that the relative humidity in the chamber need not exceed ro
10、om ambient or ambient as controlled. Operating temperature. Storage temperature. When packaged and packed in accordance with section 5, the 3.5.4 High pressure. 3.5.4.1 static pressure for three minutes and show no evidence of leakage. 3.5.4.2 static pressure of 4.14 ma (600 PSIG) for three minutes,
11、 the switch shall not become unsafe by closing of the switches. 3.6 Prior to final assembly, all parts, components, and the assembly shall be thoroughly cleaned of loose, spattered, or excess solder, metal chips, and other foreign matter. Ruggedness. The switch shall withstand without damage 4.14 Me
12、a (600 PSIG) hydro- Safety. When the switch, with the safety pin in place, is subjected to a hydro- Cleanup. 3.7 4 QUALITY ASSURANCE PROVISIONS 4.1 chase order, the supplier is responsible for the performance of all inspection requirements as specified herein. his own or any other facilities suitabl
13、e for the performance of the inspection requirements specified herein, unless disapproved by the Government. 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. Workmanship. Work
14、manship shall be in accordance with requirement 9 of NIL-STD-454. Responsibility for inspection. Unless otherwise specified in the contract or pur- Except as otherwise specified in the contract or order, the supplier may use The Government reserves the right to 4.2 sified as follows: Classification
15、of inspection. Inspection of the hydrostatic switch shal be clas- 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a. b. c. 4.3 Test equipment. tests required in this specification: First Article inspection (see 4.4) Quality conformance inspection (
16、see 4.5) Periodic production sample inspection (see 4.6) The following items of test equipment are required to perform the a. Test Set Mark 250 type with Accessory Set Mark 5 Hod O and Accessory Set Mark 13 Mod O (Government furnished) (see 6.2d). b. accuracy of k 2 percent. c. A torque wrench capab
17、le of applying ,565 N-m (5 pound-inches) of torque with an A test chamber capable of withstanding an internal pressure of 4.14 WPa (600 PSIG) hydrostatic pressure and capable of accepting a switch. d. A pull tester capable of measuring a pull of 8.9-N to 22.2-N (2 to 5 pounds). e. A resistance bridg
18、e capable of measuring a resistance of 1 ohm in increments of 0.1 ohm, accuracy 1 percent. 4.4 First article inspection. 4.4.1 designated in Table I. activity, through testing and subsequent analysis of the test results, is assured of contractor conformance to the contract technical requirements. op
19、tion of the Government based on analysis of detected defects. disapproved when either nonconforming characteristicsor unauthorized materials are found. (See 6.2b.) 4.5 Quality conformance inspection. 4.5.1 and tests designated in Table I. garding the unit as defective. 4.5.2 Sampling. switches selec
20、ted from each production lot (see 6.3.2) in accordance with MIL-STD-105, Inspection Level II, AQL of 1.0 percent defective. shall consist of one months production. Section 5. defective unit and shall result in rejection of the lot it represents if the number of defective units equals or exceeds the
21、rejection number for the stated AQL. First article sample. First articles shall be subjected to the examinations and tests First article smple approval will be granted when the Government testing Conditional acceptance may be granted at the A first article sample may be 100% inspection. During assem
22、bly, each unit shall be subjected to the examinations Any unit containing one or more defects shall be cause for re- Tests designated as sampling shall be conducted on a random sample of Unless otherwise specified (see 6.2f), a production lot Lot composition shall be in accordance with MIL-STD-105,
23、Failure of any unit to pass any quality conformance sampling test shall reject the 4.6 Periodic production inspection. (see 6.2g). 4.6.1 Periodic production samples. Periodic production tests specified in Table I shall be conducted on a random sample of hydrostatic switches selected from each lot (s
24、ee 6.2f) of hydro- static switches offered for acceptance. purchase order (see 6.2i). When a unit fails to pass any periodic production test, such failure shall be cause for rejection of the periodic production sample and the lot it represents. 4.7 Examination and test methods The sample size shall
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