1、INCH-POUND MIL-V-868(SH) 21 July 1989 MILITARY SPECIFICATION VALVES, HYDRAULIC DIRECTIONAL CONTROL, GENERAL SPECIFICATION FOR This spec Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. :ation is approved for use by the Naval Sea Sys-as Co
2、mmand, 1. SCOPE 1.1 Scope. This specification covers the requirements for directional control valves for use in hydraulic systems. or quiet operation and utilize quill-type or face seal mounting configurations. The valves are designed for standard 1.2 Classification. Directional control valves shall
3、 be designated using the standard part numbers as identified in the applicable specification sheet. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications. standards, and handbooks. The following specifica- tions, standards, and handbooks form a part of this document to the extent sp
4、ecified herein. 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 PPP-B-566 - Boxes, Folding, Paperboa
5、rd. PPP-B-601 - Boxes, Wood, Cleated-Plywood. PPP-B-636 - Boxes, Shipping, Fiberboard. PPP-B-676 - Boxes, Setup. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Comm
6、and, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 4810 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlim
7、ited Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-U-b 48 797770b 0270043 7 W: MILITARY MIL-P-116 - Preservation, Methods of. MIL-V-868/1 - Valves, Hydraulic Directional Control, Four Way, MIL-V-868/2 - Valves, Hydraulic Directional Control, Fo
8、ur Way, MIL-V-868/3 - Valves, Hydraulic Directional Control, Four Way, MS3102 - Connector, Receptacle, Electric, Box Mounting, Solder Contacts, AN Type. MIL- S - 4040 - Solenoid, Electrical, General Specification for. MIL-C-5015 - Connectors, Electrical, Circular Threaded, AN MIL-H-6083 - Hydraulic
9、Fluid, Petroleum Based, for Preserva- MIL-H- 19457 - Hydraulic Fluid, Fire Resistant, Non-neurotoxic. MIL-S-19500 - Semiconductor Devices, General Specification for. MIL-S-19500/240 - Semiconductor Devices, Diode, Silicon, Rectifier O - 12 GPM. 3 - 25 GPM. 10 - 50 GPM. Type, General Specification fo
10、r. tion and Operation. Types 1N645, 1N647, 1N649, JAN and JANTX; and JANS. 1N645-1, 1N647-1, lN649-1, JAN, JANTX, JANTXV, STANDARDS MILITARY MIL-STD-129 MIL-STD-202. - Test Methods for Electronic and Electrical MIL-STD-454 - Standard General Requirements for Electronic MIL- STD- 2193 - Hydraulic Sys
11、tem Components, Ship; Metric. - Marking for Shipment and Storage. Component Parts. Equipment. (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Naval Publications and Forms Center, (ATTN: NPODS), 5801 Tabor Avenue, Philadelphi
12、a, PA 19120-5099.) 2.2 Non-Government publications. The following document(s) 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 DODISS cited in the solicitation. Unless other
13、wise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). NATIONAL FLUID POWER ASSOCIATION (NFPA) T2.6.1 - Method for Verifying the Fatigue and Static Pressure Rating for Pressure Containing Envelope of a Metal Fluid Power C
14、omponent. (Application for copies should be addressed to the National Fluid Power Association, Inc., 3333 N. Mayfair Road, Milwaukee, WI 53222.) 2 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-b 48 7799906 0270042 O 2.3 Order of precedence.
15、 In the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obta
16、ined. a 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicable specification sheet. the event of any conflict between the requirements of this specification and the Specification sheet, the latter shall govern. In
17、 It - r 3.2 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.3. 3.3 General requirements. General requirements and materials shall be as specified herein and in accordance with MIL-STD-2193 (see 6.3). 3.4 Design and const
18、ruction. 3.4.1 General requirements. Valves shall be in accordance with the general requirements specified in 3.4.1.1 through 3.4.1.12 (see 6.3, 6.9 and appendix). 3.4.1.1 Configuration. - Valves furnished under this specification shall be of the mounting configuration as specified in the applicable
19、 specification sheet a (see 3.1). 3.4.1.2 Type. The valve shall control fluid flow direction by means of a spool or poppet. The spool shall consist of a slide and sleeve assembly or a single slide. The individual valve type shall be identified in the applicable specification sheet (see 3.1). The mot
20、ion of the spool shall be linear or rotary. 3.4.1.3 Flow pattern. Unless otherwise specified, the number of ways, positions, flow paths and center type for valves covered by this specification shall be as specified in the applicable specification sheet (see 3.1). example, a four-way valve shall be d
21、efined as a valve with four ports; pressure (P), return (R) and two cylinder ports (CA and CB). A three-way valve shall be defined as a valve with three ports; pressure (P), return (R) and one cylinder port (CA). For 3.4.1.4 Interflow. Unless otherwise specified, all valves shall be designed such th
22、at there is no interflow between the cylinder, supply and return ports when shifting from one position to another. 3.4.1.5 Manual operation. Unless otherwise designated, when the handle of a four-way valve is in the position nearest the valve body, fluid shall be directed from the “Pil port to the I
23、iCA“ port and from IiCB“ port to the “R“ pol-t. the opposite position, fluid shall be directed from the “Pi port to the “CB“ port When in 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-V-b 48 M 9999906 0270043 2 and from “CA“ port to “R“ port
24、. the valve body, fluid shall be directed from the itpit port to t8CA“ port with “R“ port blocked. rtCA“ port to “R“ port with blocked. For a three-way valve, when the handle is nearest When in the opposite position, fluid shall be directed from the 3.4.1.6 Operating handles and latches. Manually op
25、erated valves shall be provided with an operating handle. number description listed in the applicable specification sheet (see 3.1), the handle shall be provided with a latching mechanism to prevent the valve spool from changing position under high impact shock, vibration, or inadvertent bumping of
26、the handle. specification sheet (see 3.1). that the operating handle and latch can be operated simultaneously with one hand. Unless otherwise designated by the valve part The latching positions shall be as described in the applicable The design of the latching mechanism shall be such 3.4.1.7 Solenoi
27、d operation. Solenoid shall be designated “LAtt for single solenoid valves. the “CA“ port, When de-energized, the fluid shall be directed from the port to “CB“ port. valves. When “LA“ is energized, fluid shall be directed from the Pi port to “CA“ port. When iiLBtl is energized, fluid shall be direct
28、ed from the port to tiCB“ port. pos ition, When energized, the fluid shall be directed from the ifpit port to Solenoids shall be designated “LA“ and “LB“ for double solenoid When both solenoids are de-energized, valve shall move to its center 3.4.1.8 Manual overrides, Unless otherwise specified (see
29、 6.2), all solenoid operated valves shall be provided with manual overrides equipped with pin locks to allow local operation of the valve without energizing the solenoid. Once actuated, the pin lock shall be utilized to retain the valve in the override position until manually released. override an e
30、nergized solenoid or hydraulic pilot. the overrides shall be protected from inadvertent operation. The manual override shall not be required to Unless otherwise specified, 3.4.1.9 Hydraulic pilot operation. When pilot port (PPA) is pressurized, flow will be ported from supply port (P) to cylinder po
31、rt (CA) and when pilot port (PPB) is pressurized, flow will be ported from supply port (P) to cylinder port (CB) 3.4.1.10 Life. Standard valves shall be designed for at least 150,000 hours (375,000 cycles) before replacement of the total valve is necessary. rated valves shall meet the 10-million fat
32、igue cycle requirement of 3,5.7. parts shall be designed for the life of the valve with the following exceptions: Fatigue Valve (a) (b) Solenoids, The life requirement shall be in accordance with (c) Seals. Seals shall be designed for at least 20,000 hours (50,000 Filters and screens. No more than f
33、our maintenance actions shall be required during the 50,000 cycle endurance test. MIL-S-4040 for continuous duty rated solenoids. cycles) of operation. For two-position valves, a cycle is defined as starting at one position, moving the valve spool (slide) to the second position and then returning th
34、e valve spool to the original position. For a three-position valve, a cycle shall start with 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-868 48 7777706 02OOLiLi 4 9 the spool in the center position and shall consist of moving the valve sp
35、ool to one fully offset position and then to the other fully offset position and back to the center position. 3.4.1.11 Maintainability. Unless otherwise specified in the applicable specification sheet (see 3.1), the mean time to repair (MTTR) of the valve shall not exceed 60 minutes. MTTR shall be l
36、imited to fault isolation and repair by parts replacement. actuator assembly (solenoids) replacement or subassemblies that can be replaced by using the standard tools that are listed in the Federal Supply catalog. of this catalog may be consulted in the office of the Defense Contract Administra- tio
37、n Services Management Area (DCASMA).) The parts replacement shall be limited to seal replacement, (Copies 3.4.1.12 NameDlates and indicator Dlates. Unless otherwise specified (see 6.2), each valve shall be supplied with nameplates in accordance with MIL-STD-2193. shall contain the following informat
38、ion: Nameplates shall be of uniform size for each valve size range and (a) Military part or identifying number (PIN) (b) Manufacturers part or model number (c) Manufacturers name or trademark (d) Manufacturers serial number When specified, manually and solenoid operated valves shall be provided with
39、 indicator plates affixed adjacent to the manual lever or manual override. indicator plate shall be inscrlbed with the operating function (such as open and close) or the valve schematic as specified. indicator plates, one for each solenoid. The Double solenoid valves shall have two 3.4.2 Physical re
40、quirements. 3.4.2.1 Envelope. The valve envelope shall be such that the valve can be installed within the dimensions for the applicable size and type shown in the applicable specification sheet (see 3.1). 3.4.2.2 Mounting. Unless otherwise specified, valves shall be designed for subplate or manifold
41、 mounting and shall accept the interface configuration for the appropriate valve sizes listed in the applicable specification sheet (see 3.1). The seal interface configurations shall be as shown in the applicable specifica- tion sheet (see 3.1). 3.4.3 Electrical requirements. The electrical componen
42、ts associated with the solenoid operated pilot valves shall be in accordance with the following paragraphs of MIL-STD-454 in addition to the requirements specified herein: (a) Materials (b) Parts - electrical (c) Encapsulation and embedment (potting) (d) Structural welding (e) Interchangeability 5 P
43、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-868 (SH) (f) Safety (g) Soldering (h) Electrical parts mounting (i) Fungus - inert materials (j) Wiring (k) Schematic diagram 3.4.3.1 Connectors. Unless otherwise specified in the applicable specif
44、ica- tion sheet, the receptacle shall conform to MS3102, class R, shell size 16s with P contacts, and shall be mounted on each enclosure where cable entrance is required. Electrical connectors interface shall be in accordance with MIL-C-5015. Insert arrangement shall be 4P for “LA“ and 4PX for “LB“
45、(see figure i). 3.4.3.2 Solenoids. Unless otherwise designated, solenoids shall be of the continuous duty type designed in accordance with MIL-S-4040 for either alternating current (ac) operation or direct current (dc) operation through a rectifier. The type of solenoid shall be as specified in the
46、applicable specification sheet (see 3.1). The electrical requirements for the solenoid shall be as follows (see 4.6.13): Supply voltage rating - 122 volts (V) ac maximum 87 Vac minimum. Drop-out voltage - 10 Vac minimum. Ambient temperature - 4 to 50 degrees Celsius (OC). Insulation resistance - 10,
47、000 megohms at 500 Vdc between power Frequency range - O hertz (Hz) minimum; 400 Hz maximum. Dielectric strength or withstanding voltage - 1,500 (root mean input leads and case ground. square (rms) volts) plus rated voltage at 60 Hz for 60 seconds applied between input leads and case ground. maximum
48、. and actuated, shall not exceed the noise limits specified herein. Current - In rush: 250 milliamperes (mA) maximum; Holding: 140 mA The noise generated by the solenoid, when installed on the valve 3.4.3.3 Electrical insulation. Electrical insulation for all solenoids shall be class H in accordance
49、 with requirement 11 of MIL-STD-454. duty solenoids shall be designed in accordance with the life requirement of MIL-S-4040 for continuous energized operation of 168 hours at an ambient; tempera- ture of 50C (120 degrees Fahrenheit (OF) and a supply voltage of 120 Vac maximum. The solenoid shall be readily replaceable without soldering. Continuous 3.4.3.4 Rectifiers. A rectifier shall be provided for each solenoid designed for direct current operation. solenoid package a
