1、 MS28766B 8 August 2006 SUPERSEDING MS28766A (ASG) 30 April 1957 DETAIL SPECIFICATION SHEET VALVE, SHUTTLE, HYDRAULIC, DIRECT MOUNTING, 3000 PSI TYPE II SYSTEMS This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the pro
2、duct described herein shall consist of this specification sheet and MIL-DTL-19068. FIGURE 1. Valve assembly with bolt and nut installed in the body. AMSC N/A FSC 4820 INCH-POUND INACTIVE FOR NEW DESIGN AFTER 30 April 1999 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
3、icense from IHS-,-,-MS28766B 2 Note: 1. O-ring application. For MS28766 4 and 6 valves, use part number SAE-AS28775-112 O-ring. For MS28766 8 and 10 valves, use part number SAE-AS28775-211 O-ring. 2. Body, valve detail design and dimensions. 2.1 Body, valve design and configuration. The design and c
4、onfiguration of the body of the valve shall be in accordance with figure 2. Body front view FIGURE 2. Body, valve design and configuration. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28766B 3 FIGURE 2. Body, valve design and configuration - Co
5、ntinued. Notes: 1. Dimensions are in inches. Unless otherwise specified, tolerances linear dimensions for 3 digits + .005, 4 digits + .0005, angles + 0.5o. 2. The drawing outline as shown is maximum and is not restrictive to actual design but location of the ports must be maintained. 3. Provide a lo
6、ck wire hole clear of the F diameter and boss surfaces. 4. All radii shall be smooth and blended. No sharp tool marks are allowed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28766B 4 5. The machined surfaces shall be smooth to 125 micro inches
7、 Rain accordance with ASME-B46.1. 2.2 Body valve dimensions. The dimensions of the body of the valve shall be in accordance with table I. TABLE I. Body, valve dimensions. Dash No Tube OD Thread T MIL-S-7742 A Max B + .032 C Max D + .032 E +.188 -.062 DIA F + .016 DIA -4 .250 .4375-20 UNF-3B 4.000 2.
8、375 1.812 1.812 1.125 1.188 -6 .375 .5625-18 UNF-3B 4.188 2.438 1.937 1.937 1.125 1.252 -8 .500 .7500-16 UNF-3B 5.625 3.375 2.437 2.437 1.625 1.750 -10 .675 .8750-14 UNF-3B 5.625 3.375 2.437 2.437 1.625 1.750 TABLE I. Body, valve dimensions - Continued. Dash No H Max K L + .010 M + .007 P (TYP) R +
9、0005 DIA S + .004 DIA U + .010 DIA Rated Flow (GPM)-4 1.438 1.000 .312 .249 .143 .5000 .664 .797 1.22 -6 1.625 1.000 .312 .249 .143 .5000 .664 .797 3.5 -8 2.000 1.187 .375 .283 .175 .8125 1.045 1.078 6.0 -10 2.000 1.187 .375 .283 .175 .8125 1.045 1.078 10.50 3. Bolt, valve design and dimensions. 3.
10、1 Bolt, valve design and configuration. The design and configuration of the bolt of the valve shall be in accordance with figure 3. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28766B 5 FIGURE 3. Bolt, valve design and configuration. Provided by
11、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28766B 6 Notes: 1. Dimensions are in inches. Unless otherwise specified, tolerances linear dimensions for 3 digits + .010, for 4 digits + .0005, and for angles + 0.5o. 2. Diameters marked X shall be concentric w
12、ithin .005 FIM. 3. Diameters marked Y shall be concentric within .0005 FIM. 4. The machined surfaces shall be smooth to 125 micro inches Rain accordance with ASME B46.1. 5. Remove all burrs and sharp edges. 3.2 Bolt, valve dimensions. The bolt dimensions of the valve shall be in accordance with tabl
13、e II. TABLE II. Bolt, valve dimensions. Dash No Tube OD Thread S MIL-S-7742 Thread T MIL-S-7742 A + .031 B C -4 .250 .4375-20 UNF-3A .4375-20 UNF-3A 1.438 1.087 .726 -6 .375 .4375-20 UNF-3A .5625-18 UNF-3A 1.438 1.087 .726 -8 .500 .5625-18 UNF-3A .7500-16 UNF-3A 1.688 1.274 .891 -10 .675 .5625-18 UN
14、F-3A .8750-14 UNF-3A 1.688 1.274 .891 TABLE II. Bolt, valve dimensions - Continued. Dash No D E F + .010 G + .003 H + .005 J + .005 K + .003 L + .005 -4 .540 .354 .060 .172 .365 .363 .189 .433 -6 .540 .354 .060 .203 .365 .363 .189 .433 -8 .634 .377 .065 .391 .480 .480 .300 .740 -10 .634 .377 .065 .4
15、22 .480 .480 .300 .740 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28766B 7 TABLE II. Bolt, valve dimensions - Continued. Dash No M + .0004 N P + .031 R U + .062 V + .062 -4 .4989 .425 .688 2.332 1.750 - -6 .4989 .425 .875 2.431 1.812 .750 -8 .
16、8114 .738 1.000 2.782 2.125 - -10 .8114 .738 1.125 2.883 2.188 .938 4. Nut, valve detail design and dimensions 4.1 Nut, valve design and configuration. The design and configuration of the nut of the valve shall be in accordance with figure 4. FIGURE 4. Nut, valve detail design. Provided by IHSNot fo
17、r ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28766B 8 Notes: 1. Dimensions are in inches. Unless otherwise specified, tolerances linear dimensions for 3 digits + .010, for 4 digits + .0005, and for angles + 0.5o. 2. Remove all burrs and sharp edges. 3. The machined
18、surfaces shall be smooth to 125 micro inches Rain accordance with ASME-B46.1. 4.2 Nut, valve dimensions. The nut dimensions of the valve shall be in accordance with table III. TABLE III. Nut, valve dimensions. A DIA Dash No Thread B MIL-S-7742 Max Min D DIA E DIA F + .031 G + .031 -4 .4375-20 UNF-3B
19、 .3916 .3834 .687 .562 .406 .688 -6 .4375-20 UNF-3B .3916 .3834 .687 .562 .406 .688 -8 .5625-16 UNF-3B .5106 .5024 1.000 .875 .500 1.000 -10 .5625-16 UNF-3B .5106 .5024 1.000 .875 .500 1.000 VALVE REQUIREMENTS Materials. Corrosion resistant steel, type 304 or aluminum alloy type 7075-T73 or equivale
20、nt. The material selected shall be compatible with hydraulic fluid and shall meet the performance requirements specified in MIL-DTL-19068. Finish. Corrosion resistant steel (CRES) parts shall be passivated in accordance with SAE-AMS2700. Aluminum alloy parts shall be anodized in accordance with MIL-
21、A-8625 type I to protect from corrosion. Cadmium plating shall not be used. Marking. Packaging. Marking for product packaging shall be in accordance with MIL-DTL-19068. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28766B 9 Part or Identifying Nu
22、mber (PIN). The valve shall have a corrosion resistant identification plate permanently attached to the valve. The plate shall include the part number consisting of the following (in sequence): 1. The basic MS number. 2. The material CRES or aluminum. 3. A tubing size in dash number from table I. Ex
23、ample: MS28766 CRES -8 NOTES: Intended use: This direct mounted type I valve is intended for use in the aircraft type II hydraulic power systems to provide emergency fluid due to loss of pressure in the normal service lines. The valve is mounted directly on the aircraft in accordance with SAE-AS5440
24、 This valve is currently used in military aircraft and is military unique because of the specific design and dimensions which is not available for commercial aircraft. Change from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue
25、 due to the extent of the changes. Tubing size (eg., 8 = .500 tubing Material, CRES for corrosion resistant steel or AL for aluminum Basic MS number Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MS28766B 10 CONCLUDING MATERIAL Custodians: Preparing
26、 activity: Army-AV Navy-AS Navy-AS Air Force-99 (Project 4820-2005-003) Review activities Army-AT Navy-SA Air Force-71 DLA-CC Industry Association: SAE-A6C 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-,-,-
