1、MIL-V-Yb727C 25 9799906 0197752 5 E4374 MIL-V-46727C(AT) 10 October 1986 , SUPERSEDING MIL-V-46727B(AT) 23 May 1980 I MILITARY SPECIFICATION VALVE, THREE-POSITION, FOUR-WAY HYDRAULIC, MANUAL This specification is approved for use within the US Army Tank-Automotive Command, Department of the Army, an
2、d is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers three-position, four-way, hydraulic direct two types of manually operated, onal control valves w th an operating pressure of 3OO pounds per square inch (psi) (see 6.1).
3、1.2 Classification. Valves shall be of the following types, as specified (see 6.2): Type I Type II - Rated flow capacity: 6 gallons per minute - Rated flow capacity: 2 gpm. gpm) - -,- i. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improvi
4、ng this document should be addressed to: US Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. AMSC NIA FSC 2590 , DISTRIBUTION STATEMENT A
5、. Approved for public release; distribution is unlimited. THIS DOCUMENT CONTAINS /Qf PAGES* Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_-_ MIL-V-46727C 25 m 7777706 0377753 7 m MIL-V-4 6 7 2 7 C (AT) 2. APPLICABLE DOCUMENTS 2,l Government docume
6、nts. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Inde
7、x of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. I SPECIFICATIONS MILITARY MIL-P-5 14 MIL-V-5529 MIL-H-5606 MIL-H-6083 - Plate, Identification, Instruction and - Valves, Hydraulic Directional Control, - Hydraulic Fluid, Petroleum Base; Aircraft, - Hydraul
8、ic Fluid, Petroleum Base for Marking, Blank. Rotary Selector. Missile, and Ordnance. Preservation and Operation. STANDARDS FEDERAL FED-STD-H28/2 MILITARY I - Screw Thread Standards for Federal Services Section 2 Unified Inch Screw Threads-UN and UNR Thread Forms. I t MIL-STD-105 MIL-STD-130 MIL-STD-
9、202 - Test Methods for Electronic and Electrical MIL-STD-810 - Environmental Test Methods. MIL-STD-45662 - Calibration System Requirements. 2.1.2 Other Government documents, drawings, and publications. The, of this specification to the extent specified herein. Unless otherwise . specified, the issue
10、s shall be those in effect on the date of the solicitation. - Sampling Procedures and Tables for - Identification Marking of US Military Inspection by Attributes. Property. Component Parts. 55 following other Government documents, drawings, and publications form aspart *.-.e ; * ?+ -2 t I r DRAWINGS
11、 ARMY 9094352 9098279 6 I - Valve, Three Position, Four Way (Type I). - Valve, Three Position, Four Way (Type II). i JL 2 /- t Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(Copies of specifications, standards, handbooks, drawings, publications, an
12、d other Government documents required by the contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Other publications. The following document(s) form a part of this specification to the extent s
13、pecified herein. Unless otherwise specified, the issues of the documents which are DoD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS shall be the issue of the nongovernment document
14、s which is current on the date of the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B117 - Standard Method of Salt Spray (fog) Testing. (Application for copies should be addressed to American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Nongov
15、ernment standards and other publications are normally available from the organizations which prepare or which distribute the documents. These documents also may be available in or through libraries or other informational services. ) 2.3 Order of precedence. In the event of a conflict between the tex
16、t of this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific
17、 exemption has been obtained. 3. REQUIREMENTS 3.1 First article. Unless otherwise specified (see 6.2), the contractor shall furnish valves which shall be subjected to first article inspection (see 4.4). First article inspection samples, properly marked with identifying information shall be represent
18、ative of the valves 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. 3.2 Materials. Materials shall conform to the applicable requirements of MIL-V-5529. Material not spe
19、cifically designated shall be of such quality as to assure conformance of the valve to requirements specified herein and in referenced specifications, standards, and drawings. Material shall be free from defects which adversely affect performance of serviceability of the finished product. Exposed fu
20、nctional parts shall be fabricated from suitable corrosion resistant materials or treated to prevent corrosion (see 4.7.1 and 6.3). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.Lc-.F MIL-V-46727C 25 m 7779706 0377755 O W MIL-V-4 6 7 2 7 C (AT )
21、 3.3 Design and construction. Unless otherwise specified (see 6.2), the valve shall be designed and constructed to the form and dimensions specified herein, and on the applicable drawing specified below (see 4.7.1 and 4.7.2): Type I Type II - Drawing 9094352. - Drawing 9098279. 3.3. Standard parts.
22、Military standard parts shall be incorporated whenever possible. interchangeable with military standard parts without modification (see 4.7.1). Commercial standard parts may be used, provided they are 3.3.2 Interchangeability. All parts having the same manufacturers part number shall be directly and
23、 completely interchangeable with each other with respect to installation and performance. Subassemblies, composed of mating components, shall be interchangeable as assembled units (see 4.7.1). 3.3.3 Threaded parts. Screw threads shall conform to FED-STD-H28/2. The form, number per inch, and class of
24、 threads shall be as specified on the applicable drawings (see 4.7.1 and 4.7.2). 3.3.4 Valve spool. Valve spool stems exposed to dirt and moisture shall be provided with wipers and seals meeting the life requirements specified herein. Rockwell C 50 to 65. The spool surface shall be plated to resist
25、corrosion. After plating, maximum spool surface roughness shall not exceed 16 root mean square (rms). when tested for a not less than 30 hours, as specified in ASTM B117 (see 4.7.3.11.1). The spool shall be hydraulically balanced so that forces required to manipulate the levers shall not vary more t
26、han 10 percent (X) due to variations in pressure and flow. operating conditions specified herein (see 4.7.1 and 4.7.2). All exposed control-valve-spool surfaces shall be hardened to The plating shall be such that the spool shall not corrode Spools shall not bind under any 3.3.5 Weight. The gross wei
27、ght of the valve shall not exceed 2.0 pounds (lb) (see 4.7.2). . 3.4 Performance. 3.4.1 Rated flow and pressure drop. 3.4.1.1 Type I. The rated flow capacity of the valve shall be 6 gpm through any interconnected ports, with not more than a 250 psi pressure drop across the valve (see 4.7.3.1). 3.4.1
28、.2 Type II. The rated flow capacity of the valve shall be 2 gpm through any interconnected ports, with not more than a 100 psi pressure drop across the valve (see 4.7.3.1). 3.4.2 Operating torque. 3.4.2.1 Type I. The torque required to operate the valve shall be not more than 52 pound-inches (see 4.
29、7.3.2). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-46727C 25 m 9779706 0397756 2 3.4.2.2 Type II. The torque required to operate the valves shall be not more than 25 pound-inches (see 4.7.3.2). 3.4.3 Operating pressure. The valve shall o
30、perate satisfactorily throughout a hydraulic pressure range of O to 3000 psi applied to any port, except the return, while using a hydraulic fluid conforming to MIL-H-5606 or MIL-H-6083 (see 4.7.3.3). 3.4.4 Proof pressure. The valve shall withstand a hydraulic proof pressure of 4500 psi, except for
31、the return port which shall withstand 1500 psi, without external leakage, permanent deformation, or failure (see 4.7.3.4). 3.4.5 Burst pressure. The valve shall withstand a hydraulic pressure of 7500 psi, except for the return port which shall withstand 2500 psi, without bursting (see 4.7.3.5). 3.4.
32、6 Internal leakage. The valve shall withstand application of 3000 psi hydraulic pressure to sealing members of the individual fluid chambers without external leakage, and with a combined internal leakage from the ports not exceeding 10 cubic centimeters per minute (cc/min) (see 4.7.3.6). 3.4.7 Endur
33、ance. The valve shall withstand 20 O00 cycles of operation at 3000 psi hydraulic working pressure, without external leakage. A cycle shall consist of an operation of the valve from one extreme position to the other extremeposition and return to the starting position. The valves shall subsequently me
34、et the requirements of 3.4.6 (see 4.7.3.7). 3.4.8 Environmental. 3.4.8.1 High temperature. The valve shall withstand exposure to a high temperature of 160 + 5F in accordance with method 501, procedure II of MIL-STD-810 , without damage and shall conform to the perf ormance requirements of 3.4.1 and
35、3.4.7. Subsequent performance shall conform to 3.4.1, 3.4.6, and 3.4.7 (see 4.7.3.8). 3.4.8.2 Low temperature. The valve shall withstand exposure to a low temperature of -65 (+5, -0)“F in accordance with method 502, procedure 11 of MIL-STD-810, without damage and shall conform to the performance req
36、uirements of 3.4.1 and 3.4.7. Subsequent performance shall conform to 3.4.1, 3.4.6, and 3.4.7 (see 4.7.3.9). 3.4.8.3 Fungus. The valve shall withstand exposure to fungus in accordance with method 508 of MIL-STD-810. After having been subjected to conditions favorable to fungus growth as specified, t
37、he valves shall evidence no microbial growth that would adversely affect performance. Subsequent performance shall conform to 3.4.1, 3.4.6, and 3.4.7 (see 4.7.3.10). 3.4.8.4 Salt spray. The valve shall withstand exposure to salt spray in accordance with MIL-STD-810, method 509, the duration of test
38、shall be 100 hours. The valve shall evidence no corrosion after being subjected to the salt spray tests. Subsequent performance shall conform to 3.4.1, 3.4.6, and 3.4.7 (see 4.7.3.11). 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-46727C 25
39、 979770b O397757 4 MIL-V-4 6 7 2 7 C (AT) 3.4.8.4.1 Valve spool corrosion. The valve spool shall exhibit no corrosion=after exposure to salt spray as specified in ASTM B117 for not less than 30 hours (see 4,7.3.11.1). 3.4.8,5 Sand and dust. The valve shall withstand exposure to sand and dust in acco
40、rdance with method 510, procedure I of MIL-STD-810, except the temperature shall be not more than 125F for 24 hours without damage. Subsequent performance shall conform to 3.4.1, 3e406, and 3.4.7 (see 4.7.3.12). 3.4.8.6 Shock, The valve shall withstand exposure to shock in accordance with method 516
41、, procedure I of MIL-STD-810, without damage or loosening of components, 3.4.6, and 3.4.7 (see 4.7.3.13). Subsequent performance shall conform to 3.4.1, 3.4.8.7 Vibration. The valve shall withstand vibration in accordance with method 210A of MIL-STD-202, except vibration shall be for 1 hour at 77“ +
42、- 15F and 30 minutes at minus 65“ + 5F. Vibration shall be applied in the direction of each of the three majoy axes without damage or loosening of components. Subsequent performance shall conform to 3.4.1, 3.4.6, and 3.4.7 (see 4.7.3.14). . 3.5 Marking. The valve shall be marked in accordance with M
43、IL-STD-130 When specified on the drawing, Plates are to be made and as specified on the applicable drawing. the nameplate shall be in accordance with MIL-P-514. of photographic aluminum (sensitized), not less than 0.030 inch thick, with a black background, order shown (see 4.7.2): Marking shall incl
44、ude the following information in the a. Valve, Manual, Three-position, Four-way b. Military part number C. Manufacturers serial number d. Manufacturers name or trademark e. Contract or order number f. Date of manufacture g. us 3.6 Finish. Unless otherwise specified (see 6.2), finish shall conform to
45、 the requirements specified on the applicable drawing (see 4.7.2). 3.7 Workmanship. Workmanship shall be of a quality which will assure a prodbct free of burrs, rust, scratches, chips, sharp edges, or other defects which will deleteriously affect serviceability (4.7.2). 4. QUALITY ASSURANCE PROVISIO
46、NS 4.1 Responsibility for inspection. Unless otherwise specified in the Except as contract or purchase order (see 6.2), the contractor is responsible for the performance of all inspection requirements as specified herein. otherwise specified in the contract or purchase order, the contractor may use
47、his own or any other facilities suitable for the performance of the 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-qb727C 25 H 777L 0397758 b 4.2 Classification of inspection: inspection requirements specified herein, unless disapproved by t
48、he Government. The Government reserves the right to perform or witness any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items must meet all re
49、quirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply wih all requirements of the contract. Sampling in quality conformance do
