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|  MIL-V-27296C
* 3.6.2.1 Exhalation mechanism leakage. The valve shall be designed such that no portionof the exhalation
mechanism will stick in the open position and allow leakage of the ambient air into the breathing air. This is of
most concern when the valve is an a chilled environmenta and is then placed in a warm moist environment as tested
in 4.6.23. After stowage at a temperature of 50 to 55F followed by immediate subjective use, valve shall meet
the requirements specified (see 3.6.10).
3.7 Interchangability. All parts having the same manufacturer's part number shall be functionally and
dimensionally interchangeable. The drawing number requirements of MIL-STD-100 shall govern changes in the
rnanufacturer's part numbers.
3.8 Weight The weight of the valve including the valve body, the cap and bearing, sealing or isolation
washers, as applicable, shall not exceed 35 grams.
3.9 Color. The exterior of the valve body shall conform to color No. 37038 for FED-STD-595.
3.10 Identification of product. A nameplate, permanently and legibly marked in accordance with MIL-STD-
130, shall be securely attached or stamped in a conspicuous place on the valve, but shall not interfere with the
operation of the valve.
3.11 Workmanship. Inasmuch as the operation of this valve directly affects the safety of personnel,
workmanship shall be equal to or better than the highest grade of aircraft instrument manufacturing practice to
ensure minimum opportunity for the development of defects in service. The valve shall be clean and free from any
defect that might affect functionality. It shall be smooth and free of sharp edges.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsible for Inspection. Unless otherwise specified in the contractor purchase order, the contractor
is responsive for the performance of all inspection requirements (examinations and tests) as specified herein.
Except as otherwise specified in the contractor purchase order, the contractor may use his own or any other
facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the
Government. The Government reserves the right to peform any of the inspections set forth in this specification
where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements.
4.1.1 Responsibility for compliance. All items shall meet all requirements of section 3 and 5. The inspection
set forth in this specification shall become part of the contractor's overall inspection system or quality program.
The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility
of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements
of the contract. Sampling inspections as part of manufacturing operations, is an acceptable practice to ascertain
Conformance to requirements, however, this does not authorize submission of known defective material, either
indicated or actual, nor does it commit the Government to accept defective material.
4.2 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. Qualification inspection (see 4.4).
b. Quality conformance inspection (see 4.5).
4.3 Test conditions.
4.3.1 Reference conditions. Valves, rotometers, pressure and vacuum sources, and water columns shall be in
accordance with figure 6. Unless otherwise specified, testing shall be conducted with the reference axis in a
vertical-position.
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