Firetube Boilers and Accessories

Series 3 Packaged Firetube Boiler — “Ohio Special”
Three pass full wetback, packaged firetube, constructed in
accordance with requirements of the ASME code, section IV
for 1 -psi steam; Section 1 for higher pressure steam. All units
are registered with the National Board.
Boiler tubes are expanded and flared in low-pressure boilers;
expanded and beaded in high pressure boilers. Separate
second and third pass rear tube sheets allow safe expansion
and contraction.
Waterbacked rear turnaround promotes rapid internal
circulation and reduces gas temperatures at entrance to
second pass, reducing tube end stress.
Easy opening hinged, insulated front flue doors with bolted
closure provide full access to all tubes. A 16-inch diameter
bolted rear access door with observation port provides access
to the boiler furnace. Removing lightweight gasketed door(s)
installed on the rear smokebox provides rear tube access. No
elaborate seals are used. A manhole is furnished as standard
on all Ohio Special Boilers, 100 through hp. Handhole
washouts are provided for easy inspection and cleaning of
waterside surfaces.
All steam boilers are provided with a dry pan to ensure
drysteam. A feedwater diffuser is provided on high-pressure
boilers.
The round-flanged vertical smoke outlet is equipped with a
locking quadrant damper. All boilers are provided with an
enameled steel jacket over 2 inches of fiberglass insulation
and lifting lugs.
Ratings and Data
Shell Diameter
Ratings Gross Output - BHP
Gross Output - MBH
Gross Output - LBS/HR
Net Rating - MBH
Net Rating - Sq. Ft.
Safety Valve (15 PSIG) - LBS/HR
Safety Valve (150 PSIG) - LBS/HR
Heating Surface - Sq. Ft.
Fireside
Waterside
Firetubes Number
Diameter - Inches
Furnace Volume - Cu. Ft.
Diameter - Inches
Firing Rate 100 BTU Gas - MBH
140 MBTU/Gal. Oil - GPH
150 MBTU/Gal. Oil - GPH
11
The boiler is mounted on a heavy-duty structural steel base
with extended skid and burner platform for protection of the
burner during shipment and rigging.
Standard Trim and Controls
1 7 pump control/low water cut-off with alarm, contactspiped
with quick opening blowoff valve. Gauge glass set
with hand operated gauge and tri-cocks. Steam pressure
gauge: -1/ inch dial on 100 HP, 6 inch dial on larger sizes.
L 0 A operating pressuretrol, L 0 C manual reset high limit
pressuretrol and appropriate firing rate control when required.
Manual reset probe auxiliary low water cut-off. ASME side
outlet safety valve(s).
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