both the axial and radial direction at the pump operating speed. Vibration
shall be measured as displacement in mils and shall not exceed the maximum
displacement (mils-peak-to-peak) shown in the "good" range of General
Machinery Vibration Severity Chart. This chart may be obtained from Entek
IRD, 1700 Edison Drive, Cincinnati, Ohio 45150.][ Pumping unit shall be
operated at full-rated speed until the temperature rate of rise has
stabilized for all bearings. Bearings' temperature shall be considered
stabilized when the rate of rise does not exceed [0.5 degree Celsius in
five minutes] [1 degree Fahrenheit in five minutes] [[_____] degree(s)
[_____] in [_____] minutes]. Dry test run shall be repeated if it is
necessary to interrupt the test before all bearing temperatures have become
stable. [If after a run of reasonable duration][If after a test run of
[_____] hours] the temperature rate of rise for any bearing has not
stabilized, test shall be terminated until the cause of overheating is
determined and corrections made. Then dry test run shall be repeated.]
Should tests reveal that there is a design deficiency or a manufacturing
error in pumping unit components, the problem shall be promptly corrected
by and at the expense of Contractor.
3.2.2
Wet Tests
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NOTE: The longest period should be used if water
for testing will be available. The estimated water
available and the number of pumps requiring tests
should be considered when specifying length of
tests. Sound testing, if required would only
establish a base line for future reference. Consult
HI 9.1-9.9.
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Each pump unit shall be given a test under load, at or near normal
operating conditions, for at least [_____] hours or as directed by the
Contracting Officer. The test shall be conducted by the Contractor and
will be witnessed by the Government. All supplies and equipment required
to conduct the test shall be provided by the Contractor. During the test
the operation of the pumps will be observed and measurements of[ sound,]
vibration and bearing temperatures shall be taken and recorded. Without
additional costs to the Government, the Contractor shall make all changes
and correct any errors for which the Contractor is responsible. The
Contracting Officer may waive or postpone the test if sufficient water is
not available. Appropriate changes will then be made to the contract.
3.2.2.1
Pump Vibration
Vibration measurements shall be taken in accordance with HI 2.1-2.4.
Vibration limits shall not exceed those recommended by HI Figure 2.41. If
it is not possible to operate the pump at its best efficiency point,
vibration limits may be adjusted in accordance with the requirements of the
stated standard.
SECTION 15131A
Page 51
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