seal weld to the boiler front wall.
Provide windbox with support
legs.
f.
Purge Connection: Provide [steam] [air] purge connection,
properly valved, for purging oil from gun prior to removal from
burner.
[g.
Aspirating System: Provide an air aspirating system for the fuel
oil atomizer guide pipes to prevent blowback of hot furnace gases.
Aspirating system shall use approximately [_____] L/s scfmof
[_____] kPa (gage) psig compressed air.]
h.
Guide Pipe Purging: Provide piping and flexible hoses for the
guide pipe purge [and aspirating] system[s]. Air from the forced
draft fan shall be provided for guide pipe purging during normal
operation.
i.
Materials: Metal parts exposed to radiant heat, including the
atomizer shield, shall be of stainless steel or other approved
alloy.
j.
Natural Gas Control Valve: Natural gas shall be supplied at
[_____] kPa (gage) psig and [_____] degrees C F at the inlet of
the fuel piping train. Size the natural gas automatic control
valve for [_____] kPa psi differential pressure as specified in
VAMS Section 15901N CONTROLS AND INSTRUMENTATIONS BOILER PLANT.
k.
Fuel Oil Control Valve: Fuel oil will be supplied at [_____] kPa
(gage) psig and [_____] degrees C F at the inlet of the fuel
piping train. Size fuel oil automatic control valve for 103 kPa
15 psi differential pressure as specified in VAMS Section 15901N
CONTROLS AND INSTRUMENTATIONS BOILER PLANT.
l.
Fuel:
ASTM D 396, Grade no. [_____] and natural gas.
[m.
Forced Draft Fan: Fan shall be fully integrated with and mounted
on the windbox. Provide an inlet silencer, when required, to
insure operation at noise level below 85 dBA as specified in
Section 15070N MECHANICAL SOUND VIBRATION AND SEISMIC CONTROL.
The F. D. Fan Electric Motor shall be [variable speed], [_____]
volt, [_____] phase, 60 Hz, [totally enclosed, non-ventilated]
[totally enclosed, fan cooled], not less than [_____] kW hp as
specified under "Motors and Drives" in this section.]
2.4.2.2
Flame Safeguard Controls
Provide a complete system of valves, interlocks and controls in accordance
with NFPA 8501 and as approved by Factory Mutual Engineering and Research.
a.
Natural Gas Train: Provide natural gas train consisting of gas
ring, gas control valve, two safety shutoff valves, high gas
valve, and manual shutoff cock. Provide low gas pressure switch,
high gas pressure switch, and other safety interlocks and devices
as required. Provide in panel mounted on burner package the
following gages. Gages shall be 150 mm 6 inch with white coated
dial and black figures.
(1)
Natural gas supply (0 to 172 kPa (gage) 25 psig)
SECTION 15511N
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