MIL-P-52144E(ME)
4.5.2.9 Performance.
4.5.2.9.1 Pump. Prior to assembling the pump to the engine, operate the pump
using a dynamometer or calibrated electric motor at the designated operating
speed and at a static suction lift equivalent to 10 feet. Test the pump for the
requirements specified in 3.13 in accordance with the rating standards and test
code standards for centrifugal pumps of the Hydraulic Institute. Data relative
to head capacity shall be taken at a minimum of six points and shall include the
rating points, wide-open discharge, and shutoff. Delivery of less than the
capacity specified in 3.13, a peak efficiency of less than 63 percent, an NPSH
greater than 8 feet, or a horsepower requirement greater than the continuous duty
rating of the engine shall constitute failure of this test.
4.5.2.9.2 Pumping assembly (operational). Assemble the pump to the engine and
operate the pumping assembly at the designated operating speed and at a static
suction lift equivalent to 10 feet. Test the pumping assembly for the require-
ments specified in 3.13 in accordance with the rating standards and test code
standards for centrifugal pumps of the Hydraulic Institute. Data relative to
head and capacity of the pump and speed (rpm) of the engine shall be measured and
recorded at a minimum of six points on the pump performance curve. The measured
points shall include the rating points (see 3.13), wide-open discharge, and
shutoff. The pump assembly shall run for a minimum of 5 minutes at each measured
point. Delivery of less than the capacities specified in 3.13 or failure of the
engine to meet any of the operational requirements or conditions specified in
3.15.1 shall constitute failure of this test.
4.5.2.9.3 Priming. Fill the pump case with either liquid petroleum fuel or a
suitable solvent having a specific gravity of 0.75 and conduct the priming test
with a static suction lift equivalent to 10 feet of water at standard atmospheric
conditions. This test may be performed lifting either water, gasoline of 0.75
specific gravity, or a solvent of 0.75 specific gravity. Inability of the pump
to prime and deliver full capacity in 2 minutes shall constitute failure of this
test.
Apply an internal hydrostatic pressure of not
4.5.2.10 Hydrostatic pressure.
less than 200 psi to the completely assembled pumping assembly for a period of
not less than 5 minutes. This test shall be performed with the 4-inch valves
completely open and the quick-disconnect fitting covers in place. Nonconformance
to 3.14.1 shall constitute failure of this test.
4.5.2.11 Impeller balance. During the assembly of the pump, the impeller
shall be tested to determine the maximum outof-balance condition at 2400 rpm.
Nonconformance to 3.14.3 shall constitute failure of this test.
4.5.2.12 Engine performance. Prior to installation of the engine to the pump
and examination and tests of the first article, the engine shall be tested in
accordance with MIL-STD-1400, test method series 3000. Upon completion of this
test, the engine shall be sealed in accordance with MIL-STD-1400. Nonconformance
to the requirements specified herein shall constitute failure of this test.
16
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business