MS28767B
REQUIREMENTS:
Materials. Corrosion resistant steel (CRES) type 300, Aluminum alloy type 7075-T73 or equivalent. The materials selected shall be light-weight, compatible with hydraulic fluid, fuel and oil and shall meet the requirements specified in this specification sheet and
MIL-DTL-19068.
Finish: Aluminum alloy parts shall be anodized in accordance with MIL-A-8625 type I to protect from corrosion. All corrosion resistant steel (CRES) parts shall be passivated in accordance with SAE-AMS 2700. Cadmium plating shall not be used.
MARKING
Part or Identifying Number (PIN). The valve shall have a corrosion resistant identification plate permanently attached on the valve. The plate shall include the part number consisting of the following:
The basic MS number; the material; corrosion resistant steel or aluminum, and the dash number for the selected tubing size.
Example: MS28767 AL -6
Tubing size e.g., -6 = .3750
Material CRES for corrosion resistant steel or AL for aluminum
Basic MS number
Product packaging. The packaging requirement shall be as specified in MIL-DTL-19068 or as specified by the acquiring activity.
Intended use: This internally threaded valve is used for mounting with hydraulic tubing. This type II valve is intended for use with the aircraft type II hydraulic systems to provide emergency fluid due to loss of pressure in the normal pressure lines. This valve is currently used in the existing military aircraft and is military unique because of specific design and dimensions which is not available for use in other commercial aircraft.
Change from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.
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