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Finned tube coils are designed for industrial process and building services applications. The tubes are available in copper, steel and stainless steel, with fins in aluminium, copper, steel and stainless steel. Typically applications include air conditioning, space heating & cooling, process drying, heat recovery and solvent recovery.
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Finned tube evaporators are bare tube evaporators upon which fins have been installed to transfer heat from the air to the vaporizing refrigerant contained within. The fins act as a secondary heat absorbing surface, improving evaporator efficiency by increasing overall evaporator surface area while reducing coil size, weight, and cost. Finned evaporators are used quite extensively in residential and commercial refrigeration and air conditioning applications. In order for them to be effective, there must be good thermal contact between the evaporator fins and the tubing surface. This can be accomplished by several ways; one method is to solder the fin directly to the tubing. Another method is to slip the fin over the tubing and expand the tubing so that the fin locks onto the tubing surface. Once in place, the flare can be straightened out, securing the fin to the tubing.
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Finned tubes are used in high temperature applications such as steam, thermal fluid (hot oil), and hot pressurized water. It is extensively used in conventional and waste-heat boilers, fired heaters, and heat exchangers. These are probably more rugged and practical in large tube-fin exchangers.
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Finned strip heaters are used for both forced and natural convection air heating. It consists of helically wound resistance coil placed in a specially designed ceramic insulator. The resistance coil is mechanically connected to screw terminal for positive connection. Stainless steel rectangular tubing is used to house the heater assembly. All remaining voids are filled with high purity magnesium oxide to increase thermal conductivity and dielectric strength.
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Fire Alarm Control Panels are systems, which receive information from input devices, process the information and trigger an output device. Fire alarm control panels feature back-up batteries, built-in printer, data storage, explosion-proof housing, remote telephone interface, submersible ratings and volume control adjustments. Its application includes machine failure or malfunction, process control panels and structural failure.
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