Fulton FB-S Horizontal Firetube Boiler - Manual (Page 15)

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13
Page 15
Section 2 – Description & Introductions
1. General
a) Fulton model FB-S is a three-pass, water back and corrugated furnace design
steam boiler. In the first pass, the flame and high temperature flue gas flows from
the front to the back of the furnace. Through the second pass pipes, high
temperature flue gas flows from the combustion furnace to the front chamber. In
the third pass, the flue gas passes through the third pass pipes to the back of the
boiler and vents out. Corrugated furnace highly increases the heat exchange
area, heat transfer efficiency and reduces the possible damage to the boiler
durability cased by heat expansion and cold contraction.
b) Boiler is designed and manufactured to comply with ASME Code, with maximum
working pressure of 1.0MPa (150 PSI).
c) The fully packaged boiler has passed the strict test before it is delivered to the
customer. The equipment will give long life and excellent service on the job if
proper operating and maintenance instructions are followed.
d) FB-S boiler is a cylindrical vessel, with horizontal tubes passing through and
connected to the front and rear tube sheets. The vessel contains the water and
absorbs the energy generated from the flame. The front door and rear door
provide the seal to contain the hot combustion gasses. Baffles designed into the
doors serve to redirect the combustion gasses through the various firetube
passages. The flame originates in the furnace. As the combustion gasses travel
down the furnace and through the various firetube channels, heat from the flame
and combustion gasses is transferred to the water. Transferred energy develops
into the required steam or hot water.
e) The front door and rear door make it easy to clean the combustion chamber. The
pressure vessel can be inspected and repaired by the manhole on the top and
handholes on the side or bottom. The general information in this manual applies
directly to boilers in sizes ranging from 1 ton/hr through 6 ton/hr steam output
boiler for the following fuels: gas, No.2-6 Oil, No2 Oil and Gas.
f) The boiler is equipped with an automatic burner for fully modulating output.