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Product Standards
for over 100 Years.
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~Quality.
~Longevity.
~Minimum Maintenance.
~Maximum Efficiency.
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Johnston
Boiler Company is know for quality, dependability and efficiency.
Johnston manufacturers the highest quality packaged boilers
on the market. Our boilers are used for process as well as commercial
applications. With Johnston, we can reduce your operating costs.
We have the highest efficiencies and best warranties in the
industry. Our main products consist of water-back, firetube,
3- or 4-pass, steam or hot water boilers.
Our
four pass design was first built in 1978 so that customers could
have water back design reliability with the four pass design
efficiency. Every Johnston 4-pass maximizes effective heat transfer
using a full five square feet of heating surface per BHP. Also,
the rear tube sheet has only one inside and one outside surface
temperature, which reduces stress and keeps maintenance to a
minimum. As the combustion chamber is part of the pressure vessel,
internal water circulation is improved and overall boiler efficiency
is enhanced. |
The Johnston 3-pass boiler has large steam and water storage
areas, high efficiencies and the ability to meet wide load demands.
The three pass design can be manufactured up to a 2500 HP steam
boiler. As well as the 4-pass design, the 3-pass maximizes heat
transfer while minimizing the use of refractory - no expensive
door repairs.
Both 3 and 4 pass models include a 15 year limited pressure
vessel and front and rear flue door warranty. |
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Each boiler is fully factory fire tested over the complete operating
range. The boilers are built in accordance with the latest ASME
code requirements, National Electric Code and other required
local, state and insurance requirements. Dependent on the design
and operating conditions, efficiencies can reach up to 90%.
Here at Johnston, we strive to supply the right products for
your special applications. Call your local representative or
Johnston direct for more information. |
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Continuous
operation since 1864. |
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50-2500
BHP (1,700 - 85,000 PPH) |
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3
& 4 Pass Water-Back Firetube Design |
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Efficiencies
up to 90% |
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Low
NOx Emissions as low as 9, 12 or 30 PPM |
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Low
Maintenance Costs |
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15
Year Warranties |
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JOHNSTON
BOILER CO.
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BEST WARRANTIES IN THE INDUSTRY
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The
best products
with the best warranties.
(Click
these images to find
out more about our boilers
and their warranties.)
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Front
& Rear
Flue Doors
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Certified
Boiler
Efficiency
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Major
Pressure
Vessel Components
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(15)
Year Warranty
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$7,500
for 0.75%
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(15)
Year Warranty
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