1.4.4
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NOTE: A number of installation designs are possible
depending on the project site conditions. The
designer normally designs the discharge system but
has the option to allow the Contractor to design as
much of the discharge system as desired. The
calculations shall be in accordance with EM
1110-2-3105, with the hydraulic definitions as
stated in the HI standards. It is the designer's
responsibility to develop FIGURE 1.
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a. [The pumping unit shall discharge into the discharge system shown.
The system loss curve is included as FIGURE 1 at the end of this
section to permit determination of total head. Losses within the
pumping unit shall be determined by the Contractor.] [The pump
discharge system downstream of the pumping unit shall be designed by
the pump manufacturer. It shall be of the type shown and shall fit
within limiting dimensions and elevations shown. The Contractor shall
determine all losses for the discharge system and shall submit the
design head loss calculations to the Contracting Officer for approval.
Losses within the pumping unit shall be determined by the Contractor.]
[The pumping unit shall discharge into the discharge chamber shown.
The system loss curve(s) furnished includes all losses beyond the
pumping unit. Losses within the pumping unit shall be determined by
the Contractor.]
b. [Priming of the siphon will be accomplished without the assistance
of vacuum equipment.]
1.4.5
Operating Conditions
a. The pump shall be capable of operating in the dry (for the purpose
of maintenance and operating checks) for short periods of time as
b. The pump manufacturer shall establish and state in the operating
manual the procedures for starting and stopping the pumps, including
setting of valves or any sequential operations.
1.4.6
Performance Requirements
a. When operated in the dry, the maximum level of vibration of the
assembled pumping unit shall not be greater than the value of the lower
limit of the good range of the "General Machinery Vibration Severity
Chart". This chart can be obtained from Entek IRD, 1700 Edison Drive,
Cincinnati, Ohio 45150. Measurements shall be taken at pump operating
speed during the Factory Test and the field start-up test.
b. The pump shall be capable of operating without instability over the
required range of head.
1.4.7
Capacities
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NOTES: The Corps policy and procedures for plant
design and pump selection are explained in detail in
SECTION 15132A
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