Bryan Boilers Tube Steel Boilers User manual

BRYAN®BOILERS
Form No. 5900-1
(Rev. 7/08)
Originators of the “Flexible Water Tube” design
Bryan “Flexible Water Tube”
Boiler Comparison Guide
Flexible Tube Steel Boilers
Firetube Steel Boilers
Cast Iron Boilers

Boiler Comparison Guide
Installation
Minimal assembly required for new building installations x x x x
Will pass through standard doorway in existing buildings x x
Right hand or left hand construction x
35
Estimated years of service life to 25 35 ?
40
Full 5 sq ft heating surface per boiler HP or more x???
Space Requirements
Minimal floor space needed to set and service x ? x ?
Maintenance
No major disassembly required for cleaning x*
No welding or rolling required to remove and replace tubes x x
No repairs to damage caused by thermal shock x
25 year non-prorated warranty x
Efficiency
Highest operating efficiency based on combustion efficiency x ? ? ?
and burner motor horsepower
Close match to specific load based on numerous sizes available x ? ? ?
Size range from 6 HP through 500 HP x x ? ?
Fuels
Oil, gas or gas/oil x x x x
Atmospheric gas x x
Each of above available with electric if desired x
Specialty applications
Large buildings x x x x
High-rise buildings regardless of boiler location x x x
Process steam, high pressure x x x
Process steam, low pressure x x x x
Low temperature return water application not requiring external pump x
*Replacement of sections requires extensive labor and downtime.
Bryan flexible water tube steel boilers
Firetube steel boilers Cast iron boilers Competitive water tube boilers
2

Boiler Comparison Guide
3
Selecting the Proper Boiler
Installation costs. Because cast iron boilers come as
sectional units, substantial time-consuming assembly is
required. Steel boilers are shipped completely finished
and may require that walls be opened in existing buildings
or new buildings which have already been enclosed.
Bryan flexible water tube steel boilers, however, are
prepackaged units that may be easily disassembled
(“Knockdown™”) to precisely the degree necessary.
Service life. The best estimates we have on boiler
life expectancy are thirty-five years for cast iron units
and twenty-five years for firetube steel models. With
many boilers still on the job after forty to fifty years of
service, Bryan’s flexible water tube steel design has
demonstrated longevity equal to or better than that of
either alternative.
If you’re an engineer, an architect, a mechanical
contractor or a building owner, selecting or specifying
the right boiler is probably one of your many concerns.
Steel? Cast iron? Watertube? Firetube? With all the
conflicting opinions, reports and literature in circulation,
it’s no easy task.
At Bryan, we understand the problem. That’s why we’ve
put together this guide. It’s a summary of how our flexible
water tube boilers compare to firetube, cast iron and
other water tube boilers in several important areas. We
think you’ll find it helpful.
Boiler Longevity*
*Competitive flexible tube boilers not shown
due to inadequate experience.
Economy
40 years
Bryan
flexible
water
tube
boilers
35 years
cast
iron
boilers
25 years
Firetube
steel
boilers

Boiler Comparison Guide
New building installation and assembly. While
sectional cast iron boilers often cause storage problems
and the loss of parts by arriving at the job site in several
pieces at different times, Bryan flexible water tube steel
boilers are shipped as complete, prepackaged units. That
means the boiler arrives at the job site assembled and
ready for installation. In addition, Bryan boilers may be
shipped with or without tubes installed and, unlike cast
iron units, do not require any complicated assembly.
How to put a new boiler through a 26 x 56 inch opening. Bryan Knockdown™ construction allows entry into existing
buildings. You simply choose the degree of knock down
needed.
Convenience
Space saving standard and
reverse construction
allows Bryan boilers to
share common service
space as in this renovated
boiler installation in a
middle school.
Replacement installations in existing buildings.
The opening of a wall required to replace an inefficient
or worn-out boiler with an assembled steel boiler is a
troublesome, costly and time-consuming operation. Most
Bryan flexible water tube steel boilers, however, feature
Knockdown™ design which allows the unit to be easily
disassembled in stages. If necessary, the boiler may be
knocked down so it can be carried through entryways
smaller than a standard door.
4
36"
72"

Boiler Comparison Guide
5
Space requirements. Bryan flexible water tube steel
boilers generally require less floor space than comparable
cast iron units. The bent tube, removable from only one
side, requires approximately 24 to 32 inches of service
area, the same as most cast iron boilers.
With a firetube steel boiler, the floor space used by
the unit itself must be doubled in order to accommodate
tube replacement.
An additional space-saving benefit of Bryan flexible
water tube steel boilers is reverse construction. This
optional design allows two boilers to face each other,
thus sharing the same service area and saving space in
the mechanical room.
Cleaning. Generally speaking, easy access makes Bryan
flexible water tube steel boilers more convenient to clean
than either cast iron or firetube units.
Removing a Bryan boiler’s jacket access door and tube
panel exposes the entire bank of flexible water tubes.
An ordinary flue brush and vacuum cleaner are all that
is needed for complete cleaning.
Maintenance. With cast iron or firetube boilers, replacing
the unit or tubes often means complete disassembly,
welding, rolling and an outside contractor. The water
tubes in a Bryan flexible water tube steel boiler, on the
Competitive water tube boilers can require twice as much
space for service for half as much capacity. Bryans' standard
and reverse combination make it the best investment.
Cast iron boilers require a
section width area for service,
equals wider foot print.
Bryan design provides easy access
for the service and maintenance of
tubes and burner.
other hand, can be replaced by a general maintenance
worker in about thirty minutes.
Replacement tubes are available from Bryan
representatives within twenty-four hours. And, most
temporary tube repairs may be made in minutes allowing
operations to continue until replacement tubes arrive.
Firetube boilers require
floor space equal to boiler
size for tube removal.
Firetube
Cast IronOther Water Tubes
BRYAN
Space Requirements – 3,000 MBH Boiler

Boiler Comparison Guide
6
Our Efficiency is Guaranteed
Favorable or superior operating efficiencies are frequently
reported for all types of boiler, particularly in advertising
and promotional materials. Most often, these claims are
based on factory laboratory tests.
Bryan flexible water tube steel boilers achieve 86%
efficiency in operation on actual job sites with normal
140° - 160°F return water temperature.
It should be noted that differences in efficiency will
always occur between water boilers and steam boilers
or gas-fired boilers and oil-fired boilers.
Multi-boiler installations and expansion. Because
Bryan flexible water tube boilers are available in capacities
from 6 to 500 hp, they are well-suited for multi-unit
installations.
When more than one boiler is used — whether due to
expansion or in an original installation — Bryan can supply
a lead/lag demand analyzer system that
protects efficiency by enabling the owner
to sequence only those boilers required to
meet the current load demand.
Fuel and firing options. Bryan flexible
water tube boilers are offered with either
forced draft or atmospheric gas firing.
Either mode is available for use on multiple
fuels; natural/methane/propane gas and oil
or combination gas/oil.
For instance, a Bryan oil-fired hot water boiler can
be expected to operate in the 85% to 86% range, and
a forced draft gas hot water model in the 85% range.
Again, these are on-the-job efficiencies rather than factory
laboratory results.
The Bryan flexible water tube steel boiler is offered in
ratings from 6 to 500 hp. This wide selection also helps
promote higher efficiency by allowing you to select a
boiler to match your requirements more closely.
Bryan lead/lag
demand analyzer.
Versatility
In addition, the optional Bryan Energy Selector
provides oil and/or gas firing or alternate electric
power at the flip of a switch. This versatile feature is
not available in cast iron or firetube boilers.
Bryan’s Energy
Selector lets user
choose gas, oil or
electric firing with
the flip of a switch.

Boiler Comparison Guide
7
Specialty Applications
Bryan Benefits
Companion Products & Accessories
High-rise buildings. Cast iron boilers are generally
limited to operating pressure around 80 pounds. Bryan
flexible water tube boilers, however, can be provided for
working pressures up to or exceeding 150 psi, making
them ideal for high-rise buildings.
Steam process applications. Unlike low pressure cast
iron boilers, Bryan boilers are also available for nearly any
steam process application from 15 to 300 psi.
Steel boiler water heaters. All Bryan flexible tube
steel water boilers can be ordered with single or
multiple indirect
copper heat
exchangers for
a variety of water
temperatures.
This option gives
you the flexibility
to include your service or process water needs in a single
unit, in most cases, regardless of the application. Such
an arrangement reduces costs and saves mechanical
room space.
Selection. In the full range of sizes to 500 hp, nobody
sells more water tube steel boilers than Bryan Steam.
American-made reliability. Bryan Steam’s Peru,
Indiana, manufacturing facility is one of the most
advanced boiler plants in the nation. All boiler parts are
made at this facility enabling Bryan to apply exacting
quality assurance standards in every stage of the
manufacturing process.
To assure fast service, Bryan keeps many packaged
boiler units in stock at the factory. All are available with
your choice of options, ready for immediate shipment.
A reputation for quality. Industry surveys repeatedly
show Bryan Steam flexible steel water tube boilers
as the predominant choice of leading engineers and
architects.
After more than 90+ years of providing the HVAC
industry with the finest boilers available, Bryan Steam
has a quality assurance and field service program
second to none. When you own Bryan boilers, more
than 120 experienced factory-trained sales and service
representative organizations located throughout
the world are always available for consultation and
assistance.
Companion products and accessories. Bryan’s
complete line includes these dependable, performance
matched accessories. Design your complete system using
Bryan components for maximum reliability and value.
Condensate return and boiler feed pump systems.
These are available for use with any steam boiler, both
low and high pressure. Standard in simplex, duplex or
special arrangements for multiple boiler installations are
available. Tanks constructed of heavy-duty steel.
Bryan deaerators. Remove dissolved gasses from
incoming make-up water with minimal steam loss.
Deaerate to a maximum .005 cc/liter O2and
0% CO2.Spray type deaerators available
through 60,000lb/hr. Tray type deaerators
have stainless steel trays, are available in
standard capacities from 5,000 to 300,000
lb/hr.
Hot water storage tanks. Bryan offers
standard tanks in capacities up to 5,000
gallons, diameters to 84ⴖ, operating pressures from 30 to
250 psi. Protective linings, both phenolic and cement are
available. Insulated metal jacket optional.
Bryan exhaust heads. For oil-free
and water-free exhaust of steam. After
100 years, still the most reliable design
available. Flanged or threaded models
from 1ⴖto 5ⴖ, as well as flanged sizes
to 24ⴖ.
Blowdown separators and tanks. Used during
blowdown of system to separate steam from water, allows
dry steam to be vented to the atmosphere. Water may be
cooled if necessary to prevent thermal pollution.
Bryan overflow traps. Mechanical float controlled
traps with cast iron bodies, double sealed brass valves,
stainless steel ball floats. Sizes from 2ⴖto 6ⴖfor use on
pressurized deaerators.

Form No. 5900-1 © 2008 Bryan Steam LLC Printed in USA
78-8753
Bryan Steam LLC —Leaders Since 1916
783 N. Chili Ave., Peru, Indiana 46970 U.S.A.
Phone: [phone] • Internet:www.bryanboilers.com
Fax: [phone] • E-mail: [email protected]
In 1916 a locomotive engineer and steam power enthusiast named
George Bryan founded the Bryan Harvester Company, a small
manufacturing firm which produced steam powered tractors. The
rising popularity of the gasoline engine forced Bryan to abandon the
steam tractor in 1922, but it was not forgotten. The bent water tube
boiler which powered the tractor was extremely rugged, impervious
to thermal shock, compact, and easy to service, making it ideal
for other applications. Bryan Harvester became the Bryan Steam
Corporation and began refining and marketing that original boiler for
an array of uses. Today, Bryan Steam LLC continues to incorporate
many of the features found in the original Bryan Boilers. Applying the
advantages of past experience to projects for the future has made
Bryan the leader in the production of flexible water tube boilers for
more than three quarters of a century.
Since 1916— pioneer and leader in flexible water tube boilers
Bryan Steam