The Precision Boilers FTS Flexible Watertube Steam Boiler is a flextube forced draft design that offers high fuel-to-output efficiency in a compact, maintenance-friendly boiler design.  The FTS Flexible Watertube Steam Boiler harnesses natural heat convection to ensure consistent internal heat distribution and complete internal feedwater circulation.

Features & Benefits

• Individual carbon steel tubes bent into a serpentine configuration connect the lower return water vessel to the upper water-to-steam separation vessel to form a 5-pass heat transfer space providing a minimum 5 sq. ft. of heating surface per BHP.
• Separate down-comers connect the upper and lower vessels outside the boiler cabinet to optimize natural internal convection and water circulation through the heating tubes.
• Pressure vessel generates steam rapidly without the risk of thermal shock.
• FTS-1/2/3 series are configured with tangent water walls on 3 sides of the combustion chamber, requiring tube removal clearance on only one side of the boiler.
• FTS-4/5/6 series are configured with tangent water walls on 4 sides of the combustion chamber, requiring tube removal clearance on both sides of the boiler.