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|  MIL-P-52405C
4.5.2.2 Pump impeller balancing. During assembly of the pump, determine the
dynamic "out-of-balance" condition of the impeller. A dynamic "out-of-balance"
condition more than that specified in 3.7.2 shall constitute failure of this
test.
Performance.
4.5.2.3
4.5.2.3.1 Priming. Prime and operate the type I pump in accordance with the
conditions specified in 3.7.3.1.2. Priming in more than 2 minutes shall
constitute failure of this test.
4.5.2.3.2 Head capacity. Operate the pump to determine the head capacity
under the conditions specified for the designated class as applicable. The
operating time shall be that required to obtain the performance characteristics
of the pump. Nonconformance to the head and capacity for the designated class,
as applicable, shall constitute failure of this test.
4.5.2.3.3 Horsepower requirements. Operate the pump as specified in 4.5.2.3.2
for not less than 8 hours. During the last hour of the test, determine the
horsepower required by the pump. Horsepower required by the pump in excess of
the continuous-duty horsepower of the motor shall constitute failure of this
test.
4.5.2.3.4 Check valve. After the type I pump has been primed as specified in
3.7.3.1.2, subject the check valve to a pressure (total static discharge head) of
not less than the shutoff head of the pump. Shut off the pump and allow it to
sit for not less than 30 minutes. Restart the pump. Determine whether the pump
delivers water immediately. Immediate delivery of water is an indication that
the valve prevented siphoning of water from the pump case. Failure of the pump
to maintain prime, leakage, or permanent defamation of any component of the
valve shall constitute failure of this test.
4.5.2.3.5 Noise level test. Noise levels shall be measured in accordance with
MIL-STD-1474 requirements and Reported in the format indicated by MIL-STD-1474,
figure 7. As a minimum, noise levels shall be measured when equipment is
operating under full load. MIL-STD-1474, 5.1.2.1.4 contours shall be taken at
not fewer than 12 equal (horizontal) arc increments , one incurment shall include
data from the noisiest position. Additionally, the noise level at the typical
operating position shall be provided as dB(A) level. Failure to comply with
MIKL-STD-1474 shall constitute failure of this test.
4.5.2.4 Pump-case
drain.
4.5.2.4.1 Type I pump. With the pump case filled with water, remove the
drain plug to determine the drainage time of the pump case. Failure of the pump
case to completely drain in 2 minutes or less shall constitute failure of this
test.
4 .5.2.4.2 Type II pump. With the pump case filled with water and with the
discharge port mounted in any one of its four positions (vertical up, horizontal
to the left, vertical down, and horizontal to the right), remove the drain plug
to determine the drainage time of the pump case. Repeat the same operation for
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