1、 Comments, suggestions, or questions on this document should be addressed to U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or emailed to DAMI_STANDARDIZATIONconus.army.mil. Since contact i
2、nformation can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 2910 METRIC MIL-PRF-62625B(AT) 6 November 2009 SUPERSEDING MIL-PRF-62625A(AT) 8 December 1995 PERFORMANCE SPECIFICATION VALVE, FUEL-DRAIN
3、 This specification is approved for use by the U.S. Army Tank Automotive Research, Development and Engineering Center (TARDEC), Research, Development and Engineering Command (RDECOM), Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SC
4、OPE 1.1 Scope. This specification covers a check valve used for draining fuel. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification o
5、r 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 all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are list
6、ed. 2.2 Government documents. 2.2.1 Specifications, standards and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (
7、see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62625B(AT) 2 FEDERAL SPECIFICATIONS A-A-52557 - Fuel Oil, Diesel; for Posts, Camps and Stations DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-5624 - Turbine Fuel, Aviation, Grades JP-4
8、and JP-5 MIL-PRF-7024 - Calibrating Fluids, Aircraft Fuel System Components (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government
9、 documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). US ARMY TACOM
10、 DRAWINGS 12302407 - Valve, Fuel-Drain (Copies of this drawing are available from DAMI_STANDARDIZATIONconus.army.mil or U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000.) 2.3 Non-Government p
11、ublications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). AMERICAN SOCIETY FOR QUALITY (ASQ) ANSI/ASQ Z1.4 - Sampling Procedures and Tables for
12、 Inspection by Attributes (Copies of this document are available from www.asq.org or American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this documen
13、t 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. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
14、,-MIL-PRF-62625B(AT) 3 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a first article sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Materials. Materials used shall be in accordance with the manufacturers materials specifications for valves. The mater
15、ials shall be capable of meeting all of the operational and environmental requirements specified herein (see 4.4.1). 3.2.1 Metallic materials. Metallic materials shall be either corrosion resistant or protected to prevent corrosion (see 4.4.1). 3.2.2 Compatibility. The valve shall be capable of func
16、tioning with, and shall not deteriorate from contact with, the following fluids (see 4.4.1). a. Turbine fuel per MIL-DTL-5624 b. Calibration fluid per MIL-PRF-7024 c. Diesel fuel oil per A-A-52557 3.2.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environment
17、ally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs (see 4.4.1). 3.3 Design and construction. 3.3.1 Envelope. The envelope of the val
18、ve shall be as specified on drawing 12302407. 3.4 Performance. 3.4.1 Open-close pressure. When pressure is applied in the closed flow path, the valve shall close between 55 kiloPascal (kPa) and 75 kPa (between 8 and 11 pounds per square inch gage (psig). When the air pressure is decreased, the valve
19、 shall open between 75 and 55 kPa (between 11 and 8 psig) (see 4.4.4). 3.4.2 Proof pressure. The valve shall be capable of operating at 2068 kPa (300 psig) and shall be capable of withstanding a proof pressure of 3103 kPa (450 psig) with no signs of damage or external leakage (see 4.4.5). 3.4.3 Burs
20、t pressure. The valve shall be capable of withstanding a burst pressure of 5171 kPa (750 psig) without rupturing. The valve is not required to be operational after meeting this requirement (see 4.4.6). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
21、MIL-PRF-62625B(AT) 4 3.4.4 Leakage. Leakage of calibration fluid conforming to MIL-PRF-7024, type II, or an equivalent, at 4137 138 kPa (600 20 psig) through the closed flow path shall be not more than 0.5 cubic centimeters per minute (cm3/min). There shall be no external leakage (see 4.4.7). 3.4.5
22、Drainage. The valve shall drain calibration fluid conforming to MIL-PRF-7024, type II, or an equivalent, at a rate of not less than 3500 cm3/min with a pressure of 3.45 kPa (0.5 psig) (see 4.4.8). 3.4.6 Environmental. The valve shall not be damaged and shall meet the requirements of 3.4.1 to 3.4.5 d
23、uring exposure to the following environments (see 4.4.9): a. Ambient temperature range of -51 to 371 degrees Celsius (C) (-60 to 700 degrees Fahrenheit (F). b. Fluid temperature range of -51 to 371 C (-60 to 700 F). 3.5 Identification and markings. The valve shall be permanently marked for identific
24、ation in accordance with Drawing 12302407 (see 4.4.3). 3.6 Workmanship. Valves shall be processed in such a manner as to be uniform in quality and free of defects that will affect their life, serviceability, or appearance (see 4.4.3). 4. VERIFICATION 4.1 Classification of inspection. The inspection
25、requirements specified herein are classified as follows: a. First article inspection (see 4.2). b. Conformance inspections (see 4.3). 1. Acceptance tests (see 4.3.2). 2. Control tests (see 4.3.3). 4.2 First article inspection. First article inspection shall be performed on a minimum of three (3) val
26、ve samples produced under the production contract when a first article sample is required (see 3.1). This inspection shall include the examinations of 4.3 (see table I) and the tests of table II. 4.3 Conformance inspection. 4.3.1 Sampling. Samples from an inspection lot for conformance inspections s
27、hall be selected in accordance with ANSI/ASQ Z1.4. Each sample selected shall be inspected as specified herein for the defects listed in table I. Conformance to a lot shall be accepted when zero (0) defects are found and rejected when one (1) or more defects are found. First article test samples sha
28、ll not be shipped. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62625B(AT) 5 TABLE I. Classification of defects. Category Defect Method of examination Critical None Major: 101 Valve, incomplete (see 3.3). Visual 102 Dimensions affecting in
29、terchangeability, out of tolerance (see 3.3.1). SIE 1/ 103 Identification marking, improper (see 3.5). Visual 104 Faulty workmanship affecting performance (see 3.6). Visual Minor: 201 Dimensions not affecting interchangeability, out of tolerance (see 3.3.1). SIE 1/ 202 Faulty workmanship affecting a
30、ppearance (see 3.6). Visual 1/ SIE = Standard Inspection Equipment. TABLE II. Classification of inspections. Conformance Title Requirement Inspection First article Acceptance (100%) Control Materials and construction 3.2 thru 3.2.2 4.4.1 X Defects (see 4.2 and table I) 3.3.1, 3.5, and 3.6 4.4.3 X Op
31、en-close pressure 3.4.1 4.4.4 X X Proof pressure 3.4.2 4.4.5 X Burst pressure 3.4.3 4.4.6 X Leakage 3.4.4 4.4.7 X X Drainage 3.4.5 4.4.8 X X Environmental 3.4.6 4.4.9 X X 4.3.2 Acceptance tests (100 percent). Each valve selected in accordance with 4.3.1 shall be subjected to the tests specified in t
32、able II. Failure of any test shall be cause for rejection. 4.3.3 Control tests. Control tests shall be conducted on one valve from each lot of 200 units consecutively produced, except that not more than one test shall be performed in a three month period, nor less than one test in a six month period
33、. The valves shall be subjected to the tests specified in table II. 4.4 Methods of inspection. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62625B(AT) 6 4.4.1 Materials. Conformance to 3.2 thru 3.2.2 shall be determined by inspection of co
34、ntractor records providing proof or certification that materials conform to requirements. Applicable records shall include drawings, specifications, design data, receiving inspection records, processing and quality control standards, vendor catalogs and certifications, industry standards, test repor
35、ts, and rating data. 4.4.2 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be conducted under the following conditions: a. Air temperature: 21 10 C (70 20 F) b. Relative humidity: 50 30 percent 4.4.3 Defects. Conformance to 3.3.1, 3.5 and 3.6 shall be determined by
36、 examination for the defects listed in table I. Examination shall be visual, tactile, or by measurement with standard inspection equipment. 4.4.4 Open-close pressure test. To determine conformance to 3.4.1, submit the valve to increasing pressure and record when the valve poppet begins to close and
37、when it fully closes. Then decrease the pressure, and record when the valve poppet begins to re-open and when it fully opens. 4.4.5 Proof pressure test. To determine conformance to 3.4.2, submit the valve to a pressure of 3103 kPa (450 psig) for 5 minutes, then examine it for damage or external leak
38、age. 4.4.6 Burst pressure test. To determine conformance to 3.4.3, submit the valve to a pressure of 5171 kPa (750 psig), then examine it for signs of rupture. 4.4.7 Leakage test. To determine conformance to 3.4.4, subject the valve to a fluid pressure of 4137 138 kPa (600 20 psig), measure any leak
39、age and record. Then examine the valve for external leakage. 4.4.8 Drainage test. To determine conformance to 3.4.5, submit the valve to a fluid pressure of 3.45 kPa (0.5 psig), and measure and record the rate of flow. 4.4.9 Environmental tests. To determine conformance to 3.4.6, submit the valve to
40、 the tests specified in 4.4.4 through 4.4.8 at the following environments: a. Ambient and fluid temperatures of 371 C (700 F). b. Ambient and fluid temperatures of -51 C (-60 F). 5. PACKAGING 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
41、 order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel need to contact the responsible packaging Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62625B(AT) 7 activity to ascert
42、ain packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activities within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval is available from the managing Military Departments or Defen
43、se Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The valve covered by this specification is intended
44、 to be used for drainage from the combustor housing assembly. 6.2 Acquisition requirements. Acquisition documents must specify the following: a. Title, number, and date of this specification. b. If required, the specific issue of individual documents referenced (see 2.2.1, 2.2.2, and 2.3). c. Title,
45、 number, and date of applicable drawings (see 2.2.2). d. When first article is required (see 3.1). e. Inspection conditions if other than as specified (see 4.4.2). f. Packaging requirements (see 5.1). 6.3 Subject term ( key word) listings. Drainage Draining Fueling 6.4 Changes from previous issue. T
46、he margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evalua
47、te the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Custodian: Preparing Activity: Army - AT Army - AT (Project 2910-2009-007) NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
