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|  MIL-P-19131(SHIPS)
4. 3.3 Routine tests. -
4.3.3.1 Each class N-2 and class O-3 pump, except the pump tested as
required by 4.3.2, shall be tested on order to determine its ability to deliver
rated capacity of specified liquid at the minimum specified viscosity against
rated discharge pressure and with the suction lift specified for the minimum
viscosity. This test shall be of sufficient duration to indicate to the representa-
tive of the bureau or agency concerned that the specified characteristics have
been met.
4.3.3.2 Each class H-2 and class O-2. pump, except the pump tested as
required by 4.3.2, shall be tested at rated speed for a continuous nonstop run
of at least 30 minutes. While running at this speed the pump need not handle
load as this test is to insure proper. alignment and balance.
4.3.3.3 The tests specified in 4.3. 3.1 and 4.3.3.2 may be conducted with-
out the contract driving units, provided the contract driving units, including
reduction gears, if used, have been independently tested as specified in 4.3.1.
4.3.3.4 All rotors, shafts and timing gears, including repair rotating ele-
ments for class N-2 and class 0-2 pumps, shall be tested for smoothness of
running at all speeds including maximum rated speed.
4.3.4 Selective tests. -
4,3.4.1 Sampling.- Class N-4 and class 0-3 pumps shall be selected in
accordance wit table IV by the representative of the bureau or agency concerned
for tests in accordance with 4.3.4.3 to &3.4. 5, inclusive.
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