Taco Heat Exchangers feature U-tube construction and are built according to ASME Section VIII standards. A variety of materials ensures compatibility with specific applications.
Materials of Construction:
Shell Assembly: Constructed from steel pipe or rolled plate metal, the shell ensures economic efficiency and durability. Shell roundness is critical to minimize baffle spacing and optimize performance, achieved through mandrel expansion or double rolling. Impingement plates distribute fluid evenly to prevent erosion, vibration, and cavitation.
Tubes: Heat exchangers use tubing made from materials such as low carbon steel, copper, stainless steel, and more, with diameters from 0.625 to 1.5 inches. Tubes can be seamless or welded, with enhancements like fins to improve heat transfer rates. Finned tubes are ideal for fluids with lower heat transfer coefficients on the shell side. U-tube designs handle significant thermal differences but are harder to clean and maintain.
Bonnets and End Channels: Bonnets regulate fluid flow in the tube-side circuit and are fabricated or cast. Mounted against the tube sheet with bolts and gaskets, they may include pass ribs for consistent fluid velocity and pressure drop. Materials used include iron, steel, bronze, Hastelloy, nickel-plated, or stainless steel.
Baffles: Baffles guide tubes during assembly, prevent vibration, and direct shell-side fluids to increase heat transfer. They fit tightly within the shell to prevent fluid bypass and are precisely manufactured for easy assembly and maintenance. In liquid applications, baffles occupy 20-30% of the shell diameter; in gas applications, 40-45%. They are evenly spaced to reduce pressure drop and ensure even fluid velocity.
Taco Heat Exchangers are designed for reliability and efficiency, making them suitable for various industrial and commercial applications.
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