Bryan Boilers: RW

Guaranteed efficiency

The breakthrough in water tube boiler design that produced the AB Series provides operating efficiency so reliable, that we guarantee it to be 83.5% for hot water boilers and 82% – 15 PSI / 80% – 150 PSI or better for steam

The Bryan Flexible Tube

Bryan’s exclusive “Flexible Tube” design eliminates the possibility of damage  from so-called “thermal shock.” Tubes are easily removable and replaceable, without welding or rolling, eliminating long, expensive downtime should repairs ever be required.

Water cooled furnace

The configuration of the water tubes provides a water-cooled combustion chamber. A high percentage of the heating surface is exposed to direct radiant heat, increasing water velocities and heat transfer.

Accessibility of furnace and tube area

The inner panel provides easy and complete access to the furnace and boiler tube area, as well as to the burner head. All panels are heavily insulated and sealed to the boiler frame. All-access is from only one side.

Compact design, minimum floor space

With our compact water tube design, the overall size of the unit is less than most other types of boilers, yet maintains a full five square feet of heating surface area per HP. Needing only 24″ for tube removal, and on only one side of the boiler, the AB Series boiler occupies very little space in the boiler room. This can result in considerable savings in building costs. Pressurized firing permits minimum-sized breaching and vent.

Multi-pass flue gas travel

High-velocity four-pass flue gas travel is obtained by a unique baffling system. This contributes to maximum fire-side heat transfer and overall high boiler efficiencies.

Thermal blend water return

Bryan’s unique “thermal blend” return blends cold or cooler return water with warmer boiler water abridging it to design operating temperatures. An injector tube directs the “mixed” water flow through the downcomer to the lower header and heating surfaces at a temperature above possible condensing conditions. This reduces the possibility of “cold spots” and damage from corrosive condensation.

Positive internal circulation

Each pass of the Bryan water tube slopes upward. This configuration, along with the large volume downcomer water legs, provides extremely rapid natural thermal internal circulation, promoting both high efficiency of heat transfer and uniform temperature throughout the boiler. Eliminating stress damage caused by unequal temperature distribution is especially important for heating systems, particularly where intermittent or continuous low-temperature water returns may be encountered.