A full flow strainer of the replaceable cartridge type shall
be provided
between the engine and the fuel tank, upstream of the duplex
filter. An
indicating differential pressure gauge shall be provided for
upstream and
downstream of the strainer. The strainer cartridge shall be
capable of
filtering out particles down to 125 micron size.]
2.3.4
[Fuel Gas Compressor
**************************************************************************
NOTE: Use this paragraph with natural gas fueled
engines only.
**************************************************************************
Where the basic engine fuel system design requires fuel pressures above
that available at the site, a fuel gas compressor is required. This fuel
gas compressor shall be selected and certified by the engine manufacturer
to comply with both these specifications and the requirements of the engine
throughout its load range and up to 110 percent load. The fuel gas
compressor shall be packaged on the same skid as the engine with a fully
plumbed fuel system providing one point for fuel connection and junction
boxes as required for electrical connections.]
2.3.5
Safety Bypass Valve
**************************************************************************
NOTE: Delete the last sentence if natural gas
fueled engines are specified.
**************************************************************************
A safety bypass valve shall be provided next to the pump isolation valve to
prevent the buildup of excessive pressures if the discharge line or fuel
pump filters become clogged. This bypass shall protect the fuel piping
from over-pressurizing and will relieve it at [_____] kPa psi.[ The bypass
valve relief line shall return the fuel to the engine day tank.]
2.3.6
[Day Tank
**************************************************************************
NOTE: See NFPA 37 and NFPA 30 for day tank
restrictions on allowable day tank sizes. The day
tank should be located in close proximity to the
engine to avoid exceeding the total suction head
capabilities of the engine-driven fuel pump
(paragraph FUEL PUMP). Nominal suction head
capabilities of typical engine-driven fuel pumps are
in the range of 2.75 to 3.65 m (9 to 12 ft).
Delete this paragraph in its entirety if natural gas
fueled engines are specified.
**************************************************************************
Each engine shall be provided with a day tank located next to the engine.
Each day tank shall be fitted with a fuel supply line, fuel return line,
local fuel fill port, direct reading liquid level indicator, vent, fill
limit float switch assembly for automatic control of the fuel oil transfer
pump (if provided), alarm level sensing device, and a drain line. A fuel
return line cooler shall be provided, if recommended by the engine
manufacturer. Each day tank shall have [a [_____] liter gal capacity]
[capacity sufficient to supply the engine without interruption for 2 hr]
SECTION 15133A
Page 20
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