MIL-DTL-87255A(USAF)
TABLE IV. Conformance inspection.
Test
Classification of
Acceptance
Test or Inspection
Method
Sample Size
Characteristics
Criteria
Visual examination.
Every valve for
Critical
Reject all
Inspect for relief
critical defects
valves with any
valve safety wired
critical defects.
Inspection level II
Minor
An acceptable
for minor defects
level of 2.5
defects per
hundred units
for minor
defects..
Dimensions and
Inspection level S-2
Major
Acceptance
configuration
number of 0,,
rejection
number of 1.
Minimum operating
Every valve
Major
Acceptance
acceleration force
number of 0,
rejection
number of 1.
Outlet pressure
Every valve
Critical
Acceptance
regulation
number of 0,
rejection
number of 1.
Leakage
Every valve
Major
Reject all
defective units.
Anti-chatter
Inspection level I
Major
Acceptance
number of 0,
rejection
number of 1.
Response time
Every valve
Critical
Reject all
defective units.
Endurance 1/
See 4.3.1
Major
See 4.3.1
1/ This test shall be considered destructive. Valves subjected to this test shall not be
considered or shipped as part of the contract or purchase order. This test shall be conducted
on new valves ready for delivery to the Government.
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