MIL-PRF-52109H
4.1.3 Examination. Each pumping assembly shall be physically examined for compliance
with the requirements specified in 3.2 through 3.6. Any redesign or modification of commercial
equipment to comply with specified requirements shall receive particular attention for adequacy
and suitability. This element of inspection shall encompass all examinations of performance,
safety, human engineering, and dimensional requirements. Non-compliance with any specified
requirement or the presence of one or more defects shall constitute cause for rejection.
4.2 Test conditions. Unless otherwise specified herein, tests shall be performed in
accordance with the applicable provisions of the test code for centrifugal pumps, in the standards
of the Hydraulic Institute. All performance data shall be corrected to standard sea level
atmospheric conditions of 29.92 inches of mercury and water with a specific weight of 62.3
pounds per cubic foot at 68 F. Water at a temperature of between 60 and 80 F shall be used as
the test fluid, except for the High Temperature Test of 4.5.7.1 and the Low Temperature Test of
4.5.7.2. JP-8 shall be the designated primary fuel for the engine.
4.3 Operational requirements verifications.
4.3.1 Hydrostatic pressure. The non-operating pump shall be subjected to the hydrostatic
pressure listed in 3.3.1 for not less than 5 minutes. Nonconformance to 3.3.1 shall constitute
failure of this test.
4.3.2 Capacity and operation. Test the pumping assembly to the requirements specified
in 3.3.2 and in accordance with Hydraulic Institute ANSI/HI 1.6 Centrifugal Pump Tests. Data
relative to head and capacity of the pump and speed (rpm) of the engine shall be measured at a
minimum of six points on the pump performance curve and recorded. The measured points shall
include the rated capacities (see 3.3.2), 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 capacity
specified in 3.3.2 or failure of the engine to meet any of the operational requirements or
conditions specified in 3.6 shall constitute failure of this test.
4.3.3 Priming. Fill the pump case with water as specified in 4.2 and conduct the priming
test with a static suction lift equivalent to 10 feet of water. Inability of the pump to prime and
deliver the percent of rated flow in the allowed time as stated in 3.3.3 shall constitute failure of
this test.
4.3.4 Pump characteristics. The pumping assembly shall be physically inspected during
the examination of 4.1.3. Nonconformance to 3.3.4 shall constitute failure of this test.
4.3.5 Controls.
4.3.5.1 Diesel engine. The pumping assembly, with the exception of the Type II, Size 1,
Class 1 (EMD), shall be physically inspected during the examination of 4.1.3. Nonconformance
to 3.3.5.1 shall constitute failure of this test.
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