2.3.1
Pumps
2.3.1.1
Main Pump
Each engine shall be provided with an engine driven pump. The pump shall
supply fuel at a minimum rate sufficient to provide the amount of fuel
required to meet the performance indicated within the parameter schedule.
The fuel flow rate shall be based on meeting the load requirements and all
necessary recirculation.
2.3.1.2
Auxiliary Fuel Pump
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NOTE: The auxiliary fuel pump is required to
support the main pump if the length of pipe from the
day tank to the main pump is greater than the value
recommended by the engine manufacturer. This value
may be approximately 12m (40 feet); however, engine
manufacturers should be consulted during design to
verify the pumping requirements.
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Auxiliary fuel pumps shall be provided to maintain the required engine fuel
pressure, either required by the installation or indicated on the drawings.
The auxiliary pump shall be driven by a dc electric motor powered by the
starting/station batteries. The auxiliary pump shall be automatically
actuated by a pressure detecting device.
2.3.2
Filter
A minimum of one full flow fuel filter shall be provided for each engine.
The filter shall be readily accessible and capable of being changed without
disconnecting the piping or disturbing other components. The filter shall
have inlet and outlet connections plainly marked.
2.3.3
Relief/Bypass Valve
A relief/bypass valve shall be provided to regulate pressure in the fuel
supply line, return excess fuel to a return line, and prevent the build-up
of excessive pressure in the fuel system.
2.3.4
Integral Main Fuel Storage Tank
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NOTE: Delete this paragraph if an integral main
fuel storage tank is not desired.
An integral main fuel storage tank will be the only
fuel source for the engine. These tanks may be
useful for applications that require a minimal fuel
storage capacity.
Due to the minimal storage capacity, integral main
fuel storage tanks are not practical for prime power
usage. They are also not practical for standby units
that require large fuel quantities. The designer
should consider the availability and anticipated
frequency of fuel truck deliveries when deciding
whether or not to use an integral main fuel storage
SECTION 16264A
Page 30
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