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Starbar® & Moly-D® Heating Elements > Starbar Silicon Carbide SiC Heating Elements > Type TW Silicon Carbide Heating Elements > View Items  
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Type TW Silicon Carbide Heating Elements

 
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The Starbar TW element is a higher density element, used in severe applications such as corrosive atmospheres or where normal RR type elements do not provide acceptable service life. The TW element has a typical density 10 to 12% higher than normal RR elements. This higher density results in slower oxidation and aging, which yields longer element life. The dimensions and electrical properties of the TW element are similar to those of the RR element, therefore, a TW element may be interchanged directly for an RR element. The TW element due to its higher density may be more prone to thermal shock during installation into hot furnaces. Special care should be used not to thermal shock new elements during installation and heat up.

TW Starbars are described by giving the overall length, the heating section length, and the diameter. As an example, TW 43 x 24 x 1 is a Starbar 43" overall with a 24" hot zone, and 1" in diameter.



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Item #

Diameter

Hot Zone (Electrical Resistance)

Cold End (Electrical Resistance)
TW-5/8-16 5/8 Inch
16 mm 		0.1262 Ohms/Inch
0.00497 Ohms/mm 		0.00631 Ohms/Inch
0.000248 Ohms/mm
TW-3/4-19 3/4 Inch
19 mm 		0.0865 Ohms/Inch
0.00341 Ohms/mm 		0.00433 Ohms/Inch
0.00017 Ohms/mm
TW-1-25 1/1 Inch
25 mm 		0.05 Ohms/Inch
0.00197 Ohms/mm 		0.0025 Ohms/Inch
0.000098 Ohms/mm
TW-1-1/4-32 1-1/4 Inch
32 mm 		0.0343 Ohms/Inch
0.00134 Ohms/mm 		0.00171 Ohms/Inch
0.000067 Ohms/mm
TW-1-1/2-38 1-1/2 Inch
38 mm 		0.0234 Ohms/Inch
0.00092 Ohms/mm 		0.00117 Ohms/Inch
0.000046 Ohms/mm
TW-1-3/4-44 1-3/4 Inch
44 mm 		0.0165 Ohms/Inch
0.00065 Ohms/mm 		0.00082 Ohms/Inch
0.000032 Ohms/mm
TW-2-1/8-54 2-1/8 Inch
54 mm 		0.015 Ohms/Inch
0.00059 Ohms/mm 		0.00075 Ohms/Inch
0.00003 Ohms/mm
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