 |
|||
|
|
|||
| ||||||||||
|
|  MIL-P-18472G(SH)
4.6.3.1.4 The pump shall be monitored during the endurance test to
accurately record the conditions of operation, the capacity delivered, the total
head developed, the speed at which operated and the general performance observed
Data shall be collected and the pump examined at least twice per day of opera-
tion. For each periodic examination, in addition to all measured data, the record
shall indicate the following:
(a)
The pump packing or seal leakage rate and the percentage of gland
leakage collected and drained by collection areas.
(b)
The conditions of the bearings.
(c)
Provisions for collection and draining gland leakage shall be 100
percent effective.
(d)
The vibration level (normal-abnormal).
(e)
The smoothness of operation (normal-abnormal).
(f)
All other abnormal findings.
All adjustments made.
(g)
(h)
Changes made in the conditions or method of operation.
4.6.3.1.5 Endurance test acceptance criteria:
(a)
The head-capacity curve at maximum rated speed after 500 hours of
pump operation shall conform to the specification requirements
and shall show no abnormal deviations from the tune before the
500 hour test.
(b)
The unit performance and operation after 500 hours of operation
shall be unchanged and normal and meet all specification
requirements.
(c)
The unit operation at the end of the endurance test shall be
smooth and shall exhibit noise and vibration levels that are
normal and in conformance to the specification.
(d)
Lubrication shall have remained satisfactory throughout the test
period. Bearing temperatures shall have remained normal and
shall be consistent with their respective bearing clearances and
oil and grease limitations.
(e)
The pump packing shall have performed as specified. The leakage
rate shall not exceed that recommended by the supplier throughout
the test.
(f)
Running clearances shall be normal.
Components subject to attack from corrosion, erosion, cavitation,
(g)
and so forth, shall be in a condition commensurate with 500 hours
of service.
(h)
Wear rates for wearing parts critical for proper operation shall
show a rate of wear for the test period that shall be consistent
with the specified design life requirements.
(i)
No failures shall have occurred throughout the 500 hour test.
4.6.3.1.6 Post endurance test procedure.
The unit subjected to the 500
hour endurance test shall be restored to the as-new condition by replacement of
all parts worn beyond the as-new design tolerances. The restored unit shall
successfully pass- the shop tests specified in 4.6.1.1, 4.6.1.3(a) and 4.6.1.4 if
applicable. The shop test documentation shall indicate that the unit was
32
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals