1、NIL-PRF-lZLZbF W 999990b 2035947 968 W Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Tank-automotive and Armaments Command, ATTN: using the Standardization Document Improvement Propo
2、sal (DD Form 1426) appearing at the end of this document, or by letter. AMSTA-TR-EBLUE, Warren, MI 48397-5000, by I INCH-POUND I MIL-PRF- 12 126F - SUPERSEDING 2 February 1990 MIL-V-12126E PERFORMANCE SPECIFICATION VALVES, GATE: BRONZE, LEVER OPERATED, QUICK OPENING, 125 PSI AND 150 PSI This specifi
3、cation is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers lever-operated, quick-opening, bronze gate valves with a solid-wedge or double-wedge disk and threaded ends. AMSC NIA FSC 4820 DISTRIBUTION STA TEMENT A . Approved f
4、or public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- flIL-PRF-1212bF m 9Ob 2015948 8T4 m MIL-PRF- 12 126F 1.2 Class ifica tial. The valves will be of the following classes, sizes, and wedge shape, as specifie
5、d (see 6.2): Class 1 - 125 pounds per square inch (psi) (862 kilopascals (kPa) Class 2 - 150 psi (1034 kPa) Sizes: 1-inch (25 millimeter (mm) 1.5-inch (38 mm) 2-inch (51 mm) Wedge: Solid - A Double - B 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in section
6、s 3 and 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
7、all specified requirements documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. . 2.2.1 Specifications. standards.dbooks . The following specifications, standards, and handbooks form a part of this document to the extent specified herei
8、n. 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). STANDARDS FEDERAL FED-STD-595 - Colors Used in Government Procurement. (
9、Unless otherwise indicatec, copies of the above specifications, standards, and handboo are available from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 191 11-5094.) CS 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
10、 from IHS-,-,-. MIL-PRF-12L2bF 0b 20L5749 i30 MIL-PRF-12 126F 2.3 Non-Govemnient publications . The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DoDI
11、SS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSUASME B 1.1 ANSUASQC Z1.4 - Unified Inch Screw Threads (UN and UNR Thread -
12、Sampling Procedures and Tables for Inspection by Form) (DoD Adopted). Attributes (DoD Adopted). (Application for copies should be addressed to the American National Standards Institute, 11 West 42nd Street, New York, NY 10036.) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM A123 ASTM A197 AS
13、TM B61 ASTM B62 - Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel - Cupola Malleable Iron (DoD Adopted). - Standard Specification for Steam or Valve Bronze - Standard Specification for Composition Bronze or Ounce Products (DoD Adopted). Castings (DoD Adopted). Metal Castings(DoD Adopted). (Appl
14、ication for copies should be addressed to the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) SOCIETY OF AUTOMOTIVE ENGINEERS, INC. (SAE) SAE J429 SAE AS478 - Mechanical and Material Requirements for Externally Threaded Fasteners, Standard (DoD A
15、dopted). - Identification Marking Methods (DoD Adopted). (Application for copies should be addressed to the Society of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PR
16、F- 121 26F GENERAL MOTORS ENGINEERING STANDARDS GM9540P - Accelerated Corrosion Test. (Application for copies should be addressed to Global Engineering, 15 Inverness Way, Englewood, CO 801 12.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references c
17、ited 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 Descrw . The valve shall be a quick-opening, lever-operated, gate valve with a solid-wedge or a do
18、uble-wedge disk as specified in the contract (see 6.2). The disk shall be actuated through an arrangement that shall provide a fast and positive valve action. The valve body with cap and valve stem shall be fabricated of bronze, and the internal working parts shall be brass. The hand lever shall be
19、malleable iron. The valve end connections shall be integral with the valve body and shall be threaded internally with American Standard taper pipe threads (see 3.4). The exterior of the valve ends shall be shaped to provide a wrench grip. The valve shall be constructed so that the stem packing may b
20、e renewed when the valve is closed and under pressure. 3.2 Eirst art icle. When specified (see 6-21, a sample shall be subjected to first article inspection (see 6.3) in accordance with 4.2. First article inspection samples, properly marked with identifying information, shall be representative of th
21、e units to be furnished to the Government. All subsequent valves delivered to the Government shall conform to these samples in all of their pertinent physical and performance attributes. 3.3 Matem. Materials shall be as specified herein. Materials not specified shall be selected by the contractor an
22、d shall be subject to all provisions of this specification (see 3.3.2 and 3.5). 3.3.1 $ contrd . The valves shall be fabricated from compatible materials, inherently corrosion resistant, or treated to provide protection against the various forms of corrosion and deterioration that may be encountered
23、 in any of the applicable operating and storage environments to which the valves may be exposed. Corrosion protection of materials other than ASTM B61 and B62 shall be equal to or exceed that provided by hot dip galvanized 1020 steel with coating thickness in accordance with ASTM A123 with zinc phos
24、phate pretreatment (see 4.4.2.3). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-1212bF 9999906 2035952 399 MIL-PRF- 12 126F 3.3.1.1 Dissimilar metals . Dissimilar metals shall not be used in intimate contact with each other unless protec
25、ted against galvanic corrosion. 3.3.1.2 Identification of materials and finishes. The contractor shall identify the specific material, material finish or treatment for use with the component and subcomponent, and shall make information available upon request to the contracting officer or designated
26、representative. 3.3.2 Recycled. recovered. or envi ronmentallv u referable mater &. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes econom
27、ically advantageous life cycle costs. Used, rebuilt or remanufactured components, pieces and parts shall not be incorporated in the valves (see 6.5). 3.3.3 Bronze. 3.3.3.1 External parts. External parts and valve bodies, caps, and stems shall conform to ASTM B61 and shall meet all environmental and
28、performance requirements of this document. 3.3.3.2 Internal parts . Internal working parts and valve disks shall be bronze conforming to ASTM B62 and shall meet all environmental and performance requirements of this document. 3.3.4 We levers. Hand levers shall be made from malleable iron conforming
29、to ASTM A197. 3.3.5 Bolts. Bolts shall be made from steel conforming to SAE 5429. 3.4 Threads. All threads shall conform to ANSUASME B1.l. 3.5 Perform ance. The valve disk shall not jam and the internal working parts shall not be damaged by rapid and forceful operation of the lever. The valve body s
30、hall withstand the hydrostatic test pressure specified in table I without any evidence of leakage or seepage on the valve surface. When open, the valve shall provide unrestricted free-flow passage equal to that of the nominal pipe size of the valve. When closed, the valve shall withstand the full wo
31、rking pressure specified in table I applied from either end of the valve and shall show no evidence of leakage or seepage through or around the disk or seat (see 4.4.2). 3.5.1 Pressure ratings. The valves shall be designed for the pressure ratings shown in table I. 5 Provided by IHSNot for ResaleNo
32、reproduction or networking permitted without license from IHS-,-,-MIL-PRF- 12 126F Class Working pressure psi (Wa) 1 125 (862) 2 150 (1034) Hydrostatic test pressure at 150 OF (66 OC) psi (kPa) 250 (1724) 300 (2068) 3.6 Valve caps. The valve shall be provided with a removable cap for access to opera
33、ting linkage and valve disks. When the valve cap is of the threaded type, it shall be shaped to provide a wrench grip. Bolted-type caps shall have not less than four bolts of the capscrew type to secure the caps to the valve body. 3.7 Eunctio na1 labe kg. The valve shall be provided with double-ende
34、d arrows showing the direction of operation and labeled at each end to indicate the functional result (Le. “OPEN”, “CLOSE”) (see 3.9). 3.8 Treatme nt and D- . Parts normally painted shall use optional processes to treat and paint external surface which shall meet all performance and environmental re
35、quirements of this specification. Unless otherwise specified (see 6.2) top coat color shall be in accordance with FED-STD-595, color No. 34079. . Valves shall be identified in accordance with SAE AS478. . 3.9 3.10 Workmamilup . The valves shall be free from defects such as corrosion, cracks, and oth
36、er defects that could impair operation or serviceability. 4. VERIFICATION . 4.1 . The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 First arti-. 4.2.1 -. The valve shall be examined as specified in
37、4.4.1. Presence of one or more defects shall be cause for rejection. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3232bF m 9Ob 2035753 3b3 = MIL-PRF-12126F 4.2.2 Tests. The valve shall be tested as specified in 4.4.2. Failure of any test
38、 shall be cause for rejection. 4.3 Con f ormance insDec tion. 4.3.1 m. All valves of the same class and size offered for inspection at one time shall constitute a lot. 4.3.2 Sampling. Sampling for examination and tests shall conform to ANSI/ASQC 21.4. 4.3.3 Examination. Samples selected as specified
39、 in 4.3.2 shall be examined as specified in 4.4.1, Presence of one or more defects shall be cause for rejection. 4.3.4 Tests. Samples selected as specified in 4.3.2 shall be tested as specified in 4.4.2, except that the test pressure for all tests shall be held for a period of 1 minute. Failure of a
40、ny test shall be cause for rejection. 4.4 Inspection procedure. 4.4.1 Examination. The valve shall be examined as specified in table II. Category 101 102 103 104 Maior: 105 106 107 108 TABLE II. Examination schedu le. Defect Valve stem packing cannot be renewed when valve is closed and Wrench grip n
41、ot provided on end connections (see 3.1). Materials not as specified (see 3.3). Materials not resistant to corrosion and deterioration, or treated under pressure (see 3.1). to resist corrosion and deterioration for the applicable storage and operating environments (see 3.3.1). (see 3.3.1.1). indenti
42、fication of material, material finishes, or treatment (see 3.3.1.2). Used, rebuilt or remanufactured components, pieces, or parts incorporated in the valves (see 3.3.2). Threads not as specified (see 3.4). Dissimilar metals are not effectively insulated from each other Contractor does not have docum
43、entation available for Method of examination Visual Visual Visual SIE I/ Visual Visual Visual SIE 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - HIL-PRF-3232bF = 9999906 2035954 OTB Category 109 110 111 112 113 114 115 116 117 1/ SIE = MIL-PRF-
44、 12 126F TABLE II. Examlnation scheduk - Continued. Defect Valve disk jammed or internal working parts damaged under Flow passage not equal to that of the nominal pipe size (see 3.5). Valve pressure ratings not as specified (see 3.5.1). Valve caps not as specified (see 3.6). Functional labeling not
45、as specified (see 3.7). Treatment and painting not as specified (see 3.8). Color not as specified (see 3.8). Identification marking missing, incomplete, incorrect, or Workmanship not as specified (see 3.10). rapid and forceful operation of the lever (see 3.5). illegible (see 3.9). Itandard Inspectio
46、n Equipment. Method of examina tion Visual SIE SIE SIE Visual Visual Visual Visual Visual/SIE 4.4.2 Tests. 4.4.2.1 Hydrostatic test. body . The valve body shall be subjected to the applicable hydrostatic test pressure and temperature specified in table I. Water shall be used as the test fluid. With
47、one end of the valve closed and the gate in open position, pressure shall be applied from the other end. The test pressure shall be held for not less than 15 minutes. The valve body shall be examined for leakage or seepage. Any evidence of leakage or seepage shall constitute failure of this test (se
48、e 3.5 and 4.2.2). 4.4.2.2 Wdrostatic test. disk. The valve disk shall be subjected to the applicable working pressure specified in table I with the pressure applied at one end of the valve with the disk closed. Water shall be used as the test fluid. The pressure shall then be relieved, the valve sha
49、ll be opened and closed, and the same pressure shall be applied at the other end. The test pressure shall be held for not less than 15 minutes. The valve shall be examined for leakage or seepage through or around the disk or seat. Any evidence of such leakage or seepage shall constitute failure of this test (see 3.5 and 4.2.2). 4.4.2.3 Corrosion protect ion. Corrosion protection shall meet the requirements of the Acceletat
