1、 MIL-PRF-2325bC O6 2063424 572 JINCH-POUND I MIL-PRF-23256C 24 March 1998 SUPERSEDING 3 Februaxy 198 1 MIL-V-23 25 6B(AS) PERFORMANCE SPECIFICATION VALVE ASSEMBLY, SEAL This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This speci
2、fication covers the requirements for a seal valve assembly which serves as a sealing valve for a nitrogen receiver. The seal valve assembly consists of a sed valve and a filter cartridge assembly. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 a
3、nd 4 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 ail s
4、pecified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Command
5、er, Naval Air Warfare Center Aircraft Division, Code 4141OOB120-3, Hghway 547, Lakehurst, NJ 08733-5100, by using the self-addressed Standardization Document Improvement Proposai (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 4820 DISTRIBUTION STATEMENT A. Approved f
6、or public release; distribution is unlimited. Licensed by Information Handling Services MIL-PRF-2325bC 999990b 20b3425 409 b a MIL-PRF-23256C 2.2.1 Specification. standards. and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified her
7、ein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL BB-N-411 - Nitrogen, Technical DEPARTMENT OF DE
8、FENSE MIL-C-5501/3 - Cap and Plug, Protective, Dust and Moisture Seal MIL-V-23254 - Valve, Control MIL-R-8 1202 - Receiver Assembly, Nitrogen, for LAU-7 Series Launchers STANDARDS FEDEML FED-STD-H28 - Screw-Thread Standards For Federal Services DEPARTMENT OF DEFENSE MIL-STD-130 - Identification Mark
9、ing of U.S. Military Property MIL-STD-810 - Environmental Test Methods and Engineering Guidelines MS28782 - Retainer, Paclung, Back-up, Teflon MS33649 - Boss, Fluid Connection - Internal Straight Thread (vniess otherwise indicated, copies of the above specifications, standards, and handbooks are ava
10、ilable fiom the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 191 11-5094.) 2.3 Non-Government uublications. The following document forms a part of tbis document to the extent specified herein. Unless otherwise specified, the issues of the documents which are
11、 DoD adopted are those listed in the issue of the DoDISS cited in the solicitation. Unless otherwise specied, the issues of documents not listed in the DoDISS are the issues of the . documents cited in the solicitation (see 6.2). 2 Licensed by Information Handling Services. MIL-PRF-2325bC 99999Ob 20
12、b3426 345 MIL-PRF-2325 6C AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) ASME-B46.1 - Surface Texture OD adopted) (Application for copies should be addressed to the American Society of Mechanical Engineers, 345 East 47th Street, New York., NY 10017-2392.) 2.4 Order of precedence. In the event of a
13、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 obtained. 3. REQUIREMENTS 3.1 First article. When specified (see
14、6.2), a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Materials. Materials shall be compatible with the nitrogen gas and shall meet the performance requirements of this specification. 3.2.1 Metal parts. Ail parts shall be of corrosion-resistant material or treated
15、 in such a manner as to render them resistant to corrosion. Unless protected against electrolytic corrosion, dissimilar metals shall not be used in close contact with each other. 3.2.2 Protective treatment. Materiais usedin construction of the seal valve shall be protected against deterioration when
16、 exposed to any environmental conditions which will occur during service life. Protective coating shall not crack, chip, or scale during normal service life, or under extremes of environmental conditions. 3.3 Standard parts. Standard parts shall be used wherever possible. 3.4 Desim. The seal valve a
17、ssembly shall provide a positive closure to a receiver, containing air or nitrogen at a pressure of 3,800 *lo0 psig. The inlet port of the seai valve assembly shail mate with a receiver conforming to MIL-R-8 1202 and the outlet port shall mate with a control valve conforming to MIL-V-23254. The seal
18、 valve assembly shall operate within a temperature range of -65F to 250F (-54C to 121C). The seal valve assembly shall include, but not be limited to, a seal valve and a filter cartridge assembly. 3.4.1 Seal valve assembly. The seal valve assembly and integral components shaU conform to figure 1 thr
19、ough figure 10 to ensure proper interface with the receiver. 3 Licensed by Information Handling ServicesMIL-PRF-23256C 3.4. i. 1 Fitting valve seai. The valve seal fitting shail conform to figure 2 to ensure proper interface with the seal valve assembly. One fitting assembly shall be supplied and as
20、sembled in each seal valve port. The seal valve shal be repairable. The poppet “0” ring and mechanical filter ifused shaU be replaceable using hand tools. The dimensions of the O ring shall be in accordance with figure 4. 3.4.2 Filter cartridge assembly. The filter cartridge assembly shall consist o
21、f one barrel assembly inserted into the fitting assembly to ensure proper interface with the seal valve. 3.4.2.1 Barrel filter. The barrel filter shall conform to figure 3 to ensure proper interface with the filter cartridge assembly and the seal valve. The filter shall have 10 micron filtration cap
22、acity or equivalent which shall filter all gas passing through the barrel filter assembly. 3.4.3 Threads. All threads shall be in accordance with FED-STD-T328. 3.5 Performance. The seal valve shall meet all the inspection requirements specified in tables I and II. 3.5.1 Visual examination and dimens
23、ional inspection. 3.5.1.1 Visual examination. The seal valve assembly shall conform to the requirements of this specification when visually examined as specified in 4.5.1.1. 3.5.1.2 Dimensional insDection. The dimension of the seai valve assembly shail be in accordance with 3.4.1 when dimensionally
24、inspected as specified in 4.5.1.2. 3.5.2 Proof pressure. The seal valve assembly shaU not show any evidence of material Mure, when tested as specified in 4.5.2. 3.5.3 Leakage. The seal vaive assembly leakage shal be not greater than 0.2cc per minute at any pressure between 200 and 3,800 psig, when t
25、ested as specified in 4.5.3. 3.5.4 (herating pressure. When the control valve is actuated to ope4 the seal valve assembly shail ailow a burst of gas through the control valve, when tested as specified in 4.5.4. 3.5.5 Pressure drop. The seai valve assembly shall have a pressure drop not greater than
26、50 psig at a flow of lcubic foot per minute (Crm) (28.3 liter per minute (ipm) 3, when tested as specified in 4.5.5. 3.5.6 Hiph temperature. The seal valve assembly shall not show any evidence of mechanid or material failure and shall meet the leakage and operating pressure requirements (see 3.5.3 a
27、nd 3.5.4), when tested as specied in 4.5.6. 4 Licensed by Information Handling ServicesMIL-PRF-23256C 9799906 2063428 118 MIL-PRF-23 25 6C 3.5.7 Low temperature. The seal valve assembly shall not show any evidence of mechanical or material failure and shall meet the leakage and operating pressure re
28、quirements (see 3.5.3 and 3.5.4), when tested as specified in 4.5.7. 3.5.8 Thermal shock. The seal valve assembly shail not show any evidence of mechanical or material faiiure and shall meet the leakage and operating pressure requirements (see 3.5.3 and 3.5.4), when tested as specified in 4.5.8. 3.5
29、.9 Salt fog. The seal valve assembly shall not show any evidence of mechanical or material failure and shall meet the leakage and operating pressure requirements (see 3.5.3 and 3.5.4), when tested as specified in 4.5.9. 3.5.1 O Humidity. The seal valve assembly shall not show any evidence of mechani
30、cal or material failure and shall meet the leakage and operating pressure requirements (see 3.5.3 and 3.5.4), when tested as specified in 4.5.10. 3.5.1 1 Vibration. The seal valve assembly shall not show any evidence of mechanical or material failure and shall meet the leakage and operating pressure
31、 requirements (see 3.5.3 and 3.5.4), when tested as specified in 4.5.1 1. 3.5.12 Shock. The seal valve assembly shall not show any evidence of mechanical or material failure and shall meet the leakage and operating pressure requirements (see 3.5.3 and 3.5.4), when tested as specified in 4.5.12. 3.5.
32、13 Service life. The seal valve assembly shaii not show any evidence of mechanical or material faiiure and shall meet the leakage and operating pressure requirements (see 3.5.3 and 3.5.4), when tested as specified in 4.5.13. 3.5.14 Burst pressure. The seal valve assembly shaii not show any evidence
33、of permanent deformation when tested as specified in 4.5.14. 3.6 Interchanaeabiity. Au parts having the same part number shall be fnctionally and dimensionaiiy interchangeable. 3.7 Cleanliness. The seal valve assembly and all internal parts shall be free of water, oils, grease, and any foreign matte
34、r. 3.8 Identification of product. The seal valve assembly shal be marked for identjication in accordance with MIL-STD-130, except the Federal Stock Number shaii be omitted to ensure the seal valve assembly is properly and legibly identified as required. 5 Licensed by Information Handling Services MI
35、L-PRF-2325bC W 9999906 2063429 O54 W MIL-PRF-23256C 3.9 Workmanshiu. The seal valve assembly shail be dorm in quality and shall be fiee fiom irregularities and defects which could eect safkty, performance, reliability, or durability. 4. VERIFICATION 4.1 Classification of inspections. The inspection
36、requirements specified herein are classified as follows: a. First article inspection (see 4.2). b. Confomce inspection (see 4.3). 4.2 First article inspection. First article inspection shall consist of ail the examinations and tests specified in table I (listed sequence mandatory). 4.2.1 First artic
37、le samples. Unless otherwise specified in the contract, after the award of the contract or order, the macturer shall submit four complete seal valve assemblies (samples A through D in table I). The samples shall be representative of the design and constructions, workmanship, integral components and
38、materids to be used for production. When a manufacturer is in continuous production of these units fiom contract to contract, submission of furtsier rst article samples on the new contract may be waived at the discretion of the acquiring activity (see 6.2). Approval of the rst article samples or the
39、 waiving of rst article inspection does not preclude the requirements of submitting samples to the conformance inspection. The first article inspection samples shall be furnished to the Government as directed by the contracting officer (see 6.2). 4.3 Confomance inspection. Codormance inspection shai
40、i be as specified in table II (listed sequence mandatory). All samples shail be subjected to Group 1 tests followed by Group 2 tests. Any redesign or modification of the contractors standard valve to comply with specied requirements, or any redesign or modification foilowing faihire to meet the spec
41、ified requirements shall be approved by the acquisition activity prior to retesting the sample. This element of inspection shall pass all visual examinationS and dimensionai requirements. Noncompliance with any specified requirements or presence of one or more critical defects sha constitute cause f
42、or rejection of the lot. 4.3.1 Samp. The seal valve assembly shall be subjected to the salt fog test in accordance with MIL-STD-810, Method 509.3, Procedure I except the duration shall be 50 hours. The seal valve assembly shall be mated to the test fumires (see 4.4.4) except the outlet shall be seal
43、ed with a protective cap conforming to MIL-C-5501/3. While at test conditions, the inlet shall be pressurized to 225 k25 psig. At the completion of the test, the seal valve shall be visually inspected and shall meet the salt fog requirements specified in 3.5.9. The seal valve assembly shall then be
44、subjected to and shall meet the requirements of the leakage and operating pressure tests (see 4.5.3 and 4.5.4). 4.5.10 Humidity. The seai valve assembly shd be subjected to the humidity test in accordance with MIL-STD-810, Method 507.3, Procedure I except the four 24-hour cycles shall be substituted
45、 for the ten 24-hour cycles. The seal valve assembly shall be mated to the test fixtures (see 4.4.4) except the outlet shall be sealed with a protective cap conforming to MIL-C-5501/3. While at test conditions, the inlet shall be pressurized to 225 k25 psig. At the completion of the test, the seal v
46、alve sha be visuaily inspected and shall meet the requirements specified in 3.5,lO. The seal valve assembly shall then be subjected to and sha meet the requirements of the leakage and operating pressure tests (see 4.5.3 and 4.5.4). 4.5.11 Vibration. The seal valve assembly shail be subjected to the
47、following vibration tests. 11 Licensed by Information Handling Services MIL-PRF-2325bC m 99999Ob 2063q35 358 m 5- 20Hz MIL-PRF-2325 6C O. 1 O0 inch l/ 4.5.1 i. 1 General. The vibration tests specified herein shal be performed in each of three mutually perpendicular axes in the order listed below (se
48、e 4.5.1 1.2 to 4.5.11.5). All testing shail be performed in one axis prior to testing in the next axis. The seal valve assembly shall be checked for proper operation after each test (see 3.5.4). 20- 33Hz 33 - 74Hz 74 - 2.000 Hz 4.5.1 1.2 Seal valve assembly operation. The seal valve assembly shall b
49、e mated to the test fixtures (see 4.4.4), with the control valve closed. While subjected to vibration, the inlet of the seal valve assembly shall be pressurized to 3,000 hl00 psig. After each axis of vibration is completed, the seal valve assembly shaii be visually inspected and shall meet the requirements specified in 3.5.1 1. The seal valve assembly shall then be subjected to and shall meet the requirements of the leakage and operating pressure tests (see 4.5.3 and 4.5.4). *2.0 gs 0.036 inch u MO.0 ES 4.5.1 1.3 Mountin9 techniaues.
