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SPIRAL
Heating Elements
SPIROHEAT Elements are manufactured from BETA Silicon
Carbide and are available in a very large range of sizes
form 12mm to 50mm diameters and in lengths of up to 2250mm.
 Three
Piece Straight Alpha Rods
The Alpha Rod Heating element is a resistance type silicon
carbide heating element. The elements are rod shaped or
tubular depending on the diameter. They have a central
heating section referred to as a hot zone and two terminal
sections called cold ends. The cold ends are impregnated
with silicon metal to lower their resistance. This. Causes
them to, operate at a lower temperature. The extremities of
the elements are metailized with aluminum to provide a low
resistance contact surface to which the electrical
connections are made with braided aluminum straps.
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Dumbell Shaped Alpha Rods
One of the earliest heating element designs, the enlarged
cold ends of the Dumbell style element were originally made
oversized to increase cold end cross section, lowering
electrical resistance, thereby lowering cold end operating
temperature.
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U-Shaped Alpha Rods
The U type Alpha Rod is manufactured by taking two
carefully-matched SiC rods and uniting them with a silicon
carbide bridge.
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