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Slide 13 of 69

Notes:

    Radiators and Heat Exchangers
    For many years, car radiators were made from copper finstock of excellent thermal conductivity, brass tubes and brass header and bottom tanks, all soldered together to give a long-lasting product with the advantage that it could be repaired if ever damaged.
    With the development of the use of other materials to make some radiators, there was a need to review and improve the design to meet the competition. This has now been achieved with the use of copper finstock rolled to much thinner gauge in modern mills, tubing made from precision strip by either high-frequency welding or laser welding, and the use of either a zinc-based solder or a new brazing system that will permit operation at much higher temperatures. Special lacquers, electrophoretically applied, protect the finstock from corrosion caused by salted roads.
    A new sealing method is used to join the heat exchanger to the header and bottom tanks. This has reduced initial cost and weight, while retaining the high heat-exchange efficiency of copper to permit the use of a smaller total heat exchange surface and smaller content of cooling water. The finished radiator is lighter than those made of other materials, both as made and when full of coolant.
    13 Amp Plug
    For economic production of these safety-critical items, brass is used to make the pins to ensure a long, trouble-free life. Brass does not corrode in service, has good strength, electrical conductivity and resistance to wear as well as being easy to extrude.