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|  MIL-V-25023B
4.3.2 Tests.- The qualification inspections of fuel drain valves shall
consist of the following examinations and tests, in the order listed, as speci-
fied in 4.6 The qualification inspections may, at the option of the procuring
activity, be supplemented with tests under actual or simulated service con-
ditions.
Tests
Samples
Examination of product
(4.6.1)
(a)
(b)
Calibration
(4.6.2)
Fuel resistance and extreme temp-
Valve
(c)
(4.6.3)
erature
No. 1
(d)
Calibration
(4.6.2)
Disassembly and inspection
(4.6.10)
(e)
Examination of product
(4.6.1)
(a)
(b)
Calibration
(4.6.2)
Endurance
(c)
Valve
(4.6.5)
(d)
Contaminated fuel endurance
(4.6.6)
No. 2
Accelerated corrosion
(e)
(4.6.?)
Water freezing
(4.6.8)
(f)
Burst pressure
(4.6.9)
(g)
Vibration
(h)
(4.6.4)
(i)
Disassembly and inspection
(4.6.10)
4.4 Quality conformance inspection.- Quality conformance inspection shall
consist of individual tests and sampling tests.
4.4.1 Individual tests.- Each valve shall be subjected to the following tests:
(4.6.1)
(a) Examination of product
(b) Leakage
(4.6.2.1.2)
4.4.2 Sampling tests.- One valve shall be selected by the inspector from
each lot of 100 or fraction thereof on the order and subjected to the burst pressure
test (4.6.9) in addition to the individual tests specified in 4.6.
4.4.3 Rejection and retest.- If any sample fails to meet the requirements
of the sampling tests, the lot represented shall be rejected. Any valve failing
to meet the requirements of the individual tests shall be rejected and returned
at the contractor's expense, Valves which have been rejected may be replaced or
repaired to correct the defects and resubmitted for all specified tests.
Before
resubmitting, full particulars concerning previous rejection and the action
taken to correct the original defects shall be furnished the inspector. Valves
rejected after retest shall not be resubmitted without the specific approval of
the procuring activity.
4.5 Test conditions.-
4.5.1 Cleaning.- Prior to testing the valve, all internal parts normally
in contact with the fuel shall be thoroughly cleaned to remove all lubricant and
foreign matter.
6
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