MIL-DTL-27166F
4.3.3 Failures.
One or more failures shall be cause for refusal to grant first article approval.
4.4
Conformance inspection.
Contractors are required to have a process focused quality system that is approved by the
Government for conformance inspection. The contractor shall be able to demonstrate process
focus with objective evidence of effectiveness to the Government upon request from the
Government. In the absence of an approved quality system, MIL-STD-1916, verification level II
shall apply. Conformance inspection shall be performed on sample valves chosen from a lot to
determine conformance of said lot with the requirements set forth in this specification.
Conformance inspection shall consist of cycling and the reseal, leakage, cracking, and flow rate
tests in 4.6.1. and table II.
TABLE II. Conformance inspection tests.
Characteristic
Requirement
Test
Reseal
3.6.1
4.6.1.2
Leakage
3.6.1.1
4.6.1.2
Cracking
3.6.2
4.6.1.2
Minimum flow rate
3.6.3
4.6.1.2
In addition, each sample valve shall be subjected to an examination to determine conformance
to the manufacturer's drawings and the requirements of this specification.
4.4.1 Test equipment and inspection facilities.
Test and measuring equipment and inspection facilities of sufficient accuracy, quality, and
quantity, as approved by the Government, to permit performance of the conformance
inspection, shall be established and maintained by the contractor.
4.5
Test conditions.
4.5.1 Pressure.
Pressures specified are gauge pressures ±0.1 psi (689 Pa).
4.5.2 Temperature.
Unless otherwise specified, tests shall be conducted at ambient temperatures of 50 to 90 °F (10
to 32 °C).
4.5.3 Flow.
Unless otherwise specified, all flow rates specified are cubic feet per minute taken at standard
conditions. Standard conditions are defined to be 68 °F (20 °C) for temperature and 14.7 psi
(101.4 kPa) for pressure.
4.6
Performance tests.
4.6.1 Cycling, cracking, reseal, leakage, and flow rate.
Cycling and the following tests shall be performed for each sample valve in the order listed.
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