Thrush Co. Inc. specializes in shell and tube heat exchangers with a standard construction featuring cast iron heads, steel shells, baffles, and tube sheets, and 3/4" 20 gauge copper tubes. Built to ASME Code, Section VIII, Division 1, and National Board Registered, these exchangers are designed for applications including heating or cooling liquids in process systems, heat recovery, and comfort systems. They are available in various materials, pressures, temperatures, and special features to meet specific needs, ensuring safety and optimal performance through an approved quality control program.
Shell Assembly: Constructed from steel pipe or rolled plate metal for economic efficiency and durability. Shell roundness, achieved through mandrel expansion or double rolling, is critical to minimize baffle spacing and optimize performance. Impingement plates are used to distribute fluid evenly, preventing 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 fins added to improve heat transfer rates. 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.
Thrush Heat Exchangers are designed for reliability and efficiency, making them suitable for various industrial and commercial applications.
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