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 https:/assist.daps.dla.mil. AMSC N/A FSC 4820 METRIC MIL-PRF-62382C 4 January 2011 SUPERSEDING MIL-PRF-62382B(AT) 19 October 1995 PERFORMANCE SPECIFICATION VALVE, HYDRAULIC, PRE
3、SSURE RELIEF (METRIC) This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of in-line hydraulic pressure relief valve used in a military combat vehicle to control system differential pressure at a
4、predetermined level (see 6.1). 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 or recommended for additional information or as e
5、xamples. 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 listed. 2.2 Government documents. 2.2.1 Specificatio
6、ns, 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 (see 6.2). Provided by IHSNot for ResaleNo repro
7、duction or networking permitted without license from IHS-,-,-MIL-PRF-62382C 2 FEDERAL STANDARDS FED-STD-595/24533 - Seafoam Green DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-5606 - Hydraulic Fluid, Petroleum Base: Aircraft, Missile and Ordnance MIL-PRF-6083 - Hydraulic Fluid, Petroleum Base: For Pr
8、eservation and Operation (Copies of these documents are available from https:/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 documents, drawings, and publications. The following o
9、ther 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). U.S. ARMY TACOM DRAWINGS 12265558 - Valve, Pressure Relief (Copies o
10、f these documents 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 publications. The following documents form a p
11、art 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 Inspection by Attributes (DoD Adopted) (Copi
12、es of this document are available from www.asq.org or American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62382C 3 ASTM INTERNATIONAL ASTM B117 - Standard Test Metho
13、d of Salt Spray (Fog) Testing (Copies of these documents are available from www.astm.org or ASTM International, P.O. Box C700, West Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document an
14、d 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 6.2), a first article sample shall be subject
15、ed to first article inspection in accordance with 4.2. 3.2 Materials. Materials used shall be in accordance with the manufacturers materials specifications for hydraulic valves. The materials shall be capable of meeting all of the operational and environmental requirements specified herein (see 4.5.
16、1). 3.2.1 Age-sensitive materials. The use of age-sensitive materials shall be as specified in the contract or order (see 6.2). The maximum age of the valve poppet seal (see 3.2.5) shall not exceed 40 quarters at time of acceptance of the valve by the Government. 3.2.2 Fungus. Only materials which a
17、re fungus non-nutrient shall be used. 3.2.3 Hydraulic fluids. The valve shall be compatible with hydraulic fluids conforming to MIL-PRF-5606 and MIL-PRF-6083. 3.2.4 Metals. All metals used in the construction of the valves except metal which is in constant contact with the hydraulic fluid, shall be
18、of a corrosion-resistant type or shall be suitably protected to resist corrosion during the normal service life of the valves. The use of dissimilar metals, especially brass, copper, or steel in intimate metal to metal contact, shall be avoided. 3.2.5 Poppet seal. The valve poppet seal shall be of e
19、lastomer material to minimize leakage under shock and vibration conditions. 3.2.6 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
20、operational and maintenance requirements, and promotes economically advantageous life cycle costs. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62382C 4 3.3 Design and construction. The valve shall conform to the manufacturers design and c
21、onstruction for hydraulic pressure relief valves except for outline dimensions, and porting hole dimensions and locations which shall conform to Drawing 12265558 (see 4.5.2). 3.3.1 End cap. The threaded end cap (outlet port) of the valve shall be safety-lockwired with 0.51 millimeter (mm) (0.020 inc
22、h) diameter corrosion resistant steel wire in accordance with Drawing 12265558. 3.4 Performance. 3.4.1 Proof pressure. The valve shall withstand an internal pressure of 31 000 kilopascals (kPa) (4500 pounds per square inch gage psig) without leaking externally. The valve shall not be damaged and sha
23、ll subsequently meet the requirements of 3.4.3 and 3.4.4 (see 4.5.4.1). 3.4.2 Burst pressure. The valve shall withstand an internal pressure of 52 000 kPa (7500 psig) without rupture of internal or external parts. The valves need not be operable after this exposure (see 4.5.4.2). 3.4.3 Function. Unl
24、ess otherwise specified herein, the valve shall function as specified below with hydraulic pressure applied to the inlet port. 3.4.3.1 Cracking pressure. The valve poppet shall crack open when the differential pressure across the valve is not more than 140 kPa (20 psi). The flow after cracking shall
25、 be not less than 1.9 liters per minute (L/min) (0.5 gallons per minute gal/min) at 1407 kPa (201 pounds per square inch differential psid) (see 4.5.4.3). 3.4.3.2 Rated flow and pressure drop. With fluid flow through the valve of 20 L/min (5 gal/min), the pressure drop through the valve shall not be
26、 greater than 100 kPa (15 psid) (see 4.5.4.4). 3.4.3.3 Reseat pressure. After flow is established through the valve, the poppet shall reseat when the differential pressure is not less than 70 kPa (10 psid). No flow shall be permitted in the reverse direction (see 4.5.4.5). 3.4.4 Low pressure leakage
27、. There shall be no evidence of leakage through the valve when a pressure of 35 kPa (5 psig) is applied at the inlet port; there shall be no evidence of leakage when 200 kPa (30 psig) is applied at the outlet port (see 4.5.4.6). 3.4.5 Environmental. The valve shall meet the requirements of 3.4.1 and
28、 shall operate as specified in 3.4.3 and 3.4.4 under the following environmental conditions. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62382C 5 3.4.5.1 High temperature. The valve shall operate after exposure to an ambient temperature o
29、f +70 degrees Celsius (C) (+160 degrees Fahrenheit F) and during and after exposure to +60 C (+140 F) (see 4.5.5.1). 3.4.5.2 Low temperature. The valve shall operate after exposure to an ambient temperature of -54 C (-65 F), and during and after exposure to -32 C (-25 F) (see 4.5.5.2). 3.4.5.3 Fluid
30、 temperature. The valve shall operate when exposed to hydraulic fluid temperatures ranging from +70 C (+160 F) to -32 C (-25 F) (see 4.5.5.3). 3.4.5.4 Salt fog. The valve shall operate after exposure to a salt-fog environment (see 4.5.5.4). 3.4.5.5 Shock resistance. The valve shall operate after exp
31、osure to a shock impulse of 25 gravity units (g) for 11 +0/-1 milliseconds (ms), half-sine wave, applied along three mutually perpendicular axes (see 4.5.5.5). 3.4.5.6 Vibration resistance. The valve shall operate after exposure to the following vibration conditions (see 4.5.5.6). a. Simple harmonic
32、 motion. b. Motion applied along three mutually perpendicular axes. c. Peak acceleration of 10g at all frequencies. d. Frequency range, 20 to 2000 Hertz (Hz). e. Frequency sweep varied logarithmically. f. Sweep time, 355 minutes. g. Dwell 5 minutes at each observed resonant frequency. 3.5 Cleanlines
33、s. Upon completion of testing, sufficient quantity of fluid shall be retained in the valve to assure proper preservation during extended storage. Ports shall be covered with suitable plugs. Valve internal cleanliness shall conform to the level shown in table I (see 4.6). TABLE I. Valve internal clea
34、nliness. Maximum size of surface particles (micrometers) Maximum quantity of particles 25 7450 50 1020 100 95 250 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62382C 6 3.6 Painting. The exterior surfaces of the valve shall be prepared, p
35、rimed or treated, and painted as suitable for the material of the valve body (see 4.5.2). Color of finish shall be seafoam green, #24533 of FED-STD-595. 3.7 Marking. The valve shall be marked with the National Stock Number (NSN) and the manufacturers name and part number. Marking shall be permanent
36、and legible (see 4.5.2). 3.8 Workmanship. Workmanship shall be of the quality as to assure that valves furnished under this specification are free of defects that compromise, limit, or reduce performance in intended use (see 4.5.2). 4. VERIFICATION 4.1 Classification of inspection. The inspection co
37、nditions specified herein are classified as follows: a. First article inspection (see 4.2) b. Conformance inspection (see 4.3) 4.2 First article inspection. Unless otherwise specified (see 6.2), first article inspection shall be performed on preproduction or initial production samples as specified w
38、hen a first article sample is required (see 3.1). This inspection shall include the examinations of 4.4 (see table II) and the tests of 4.5.4.1 through 4.6 (see table III). TABLE II. Classification of defects. Category Defect Method of examination Major: 101 Dimensions affecting interchangeability,
39、not within tolerance (see 3.3). SIE 1/ 102 End cap safety-lockwiring, not to requirements (see 3.3.1). Visual 103 Identification marking, improper (see 3.7). Visual 104 Faulty workmanship affecting performance (see 3.8). SIE Minor: 201 Dimensions not affecting interchangeability, not within toleranc
40、e (see 3.3). SIE and Visual 202 Painting, improper (see 3.6). Visual 203 Faulty workmanship affecting appearance (see 3.8). Visual 1/ SIE = Standard Inspection Equipment. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62382C 7 TABLE III. Cla
41、ssification of inspections. Title Requirement Inspection First article Conformance tests Proof pressure 3.4.1 4.5.4.1 X X Burst pressure 3.4.2 4.5.4.2 X Cracking pressure 3.4.3.1 4.5.4.3 X X Rated flow and pressure drop 3.4.3.2 4.5.4.4 X X Reseat pressure 3.4.3.3 4.5.4.5 X X Low pressure leakage 3.4
42、.4 4.5.4.6 X X High temperature 3.4.5.1 4.5.5.1 X Low temperature 3.4.5.2 4.5.5.2 X Fluid temperatures 3.4.5.3 4.5.5.3 X Salt fog 3.4.5.4 4.5.5.4 X Shock resistance 3.4.5.5 4.5.5.5 X Vibration resistance 3.4.5.6 4.5.5.6 X Cleanliness 3.5 4.6 X X 4.2.1 Preproduction inspection. When specified (see 6.
43、2), first article preproduction inspection shall be performed on two valves. This inspection shall include the examinations of 4.4 (see table II) and the tests of 4.5.4.1 through 4.6 (see table III). 4.2.2 Initial production inspection. Unless otherwise specified (see 6.2), first article initial pro
44、duction inspection shall be performed on two valves. This examination shall include the examinations of 4.4 (see table II) and the tests of 4.5.4.1 through 4.6 (see table III). 4.3 Conformance inspection. Conformance inspection shall include the examinations of 4.4 (see table II) and the tests of 4.
45、5.4.1 through 4.5.4.6 and 4.6 (see table III). 4.4 Examination. 4.4.1 Sampling. Samples from an inspection lot for conformance inspection shall be selected in accordance with ANSI/ASQ Z1.4. Any redesign or modification of the contractors standard to comply with specified requirements shall receive p
46、articular attention for adequacy and suitability. This element of inspection shall encompass all visual examinations and dimensional measurements of requirements 3.3, 3.3.1, 3.6, 3.7 and 3.8 as listed in table II. Noncompliance with any specified requirement or presence of one or more defects preven
47、ting or lessening maximum efficiency shall constitute cause for rejection. 4.5 Method of inspection. 4.5.1 Materials. Conformance to 3.2 shall be determined by inspection of contractor records providing proof or certification that materials conform to requirements. Applicable records shall include d
48、rawings, specifications, design data, receiving inspection records, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-62382C 8 processing and quality control standards, vendor catalogs and certifications, industry standards, test reports, and r
49、ating data. 4.5.2 Defects. Conformance to 3.3, 3.3.1, 3.6, 3.7 and 3.8 shall be determined by examination for the defects listed in table II. Examination shall be visual, tactile, or by measurement with SIE. 4.5.3 Test conditions. Unless otherwise specified (see 6.2), ambient air temperature shall be 2310 C (7318 F), barometric pressure shall be 725 +50/-75
