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| WHY THE HEATERS FAIL ? | |||
| For over 3 decades, EXCEL has been solving complex and unique application problems of heaters. We are continuously improving our design and application knowledge through our engineering expertise and our experience with end - user applications, resulting in the best heat solutions. | |||
| The following are some helpful hints to keep the heaters running smoothly | |||
| WHY THE HEATERS FAIL ? | |||
| REASONS | SOLUTIONS | ||
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Loose fitting on the cylinder (barrel) | |
Refer “right mounting of band heaters - Installation procedure” |
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The selection of the wrong watt densities | |
Match
the heater wattage as closely as possible to the actual load requirements to limit ON / OFF cycling |
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The watt densities shouldn’t exceed recommended limit | ||
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Defective temperatures sense by the thermocouple | |
The "below" (tip) of thermocouple should be inserted deeply in the cylinder |
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The "below" (tip) should not vibrate | ||
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Check the polarity of thermocouple with temperature controllers | ||
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Leakage of polymer melt or oil | |
Rectify the leakage immediately |
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Voltage fluctuation | |
Check the voltage regularly |
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Heater that is forced to operate beyond its maximum capacity to operate the temperatures | |
To prevent premature failure, the heater shouldn’t operate beyond its maximum recommended temperatures |
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The wrong reading of the temperature controllers | |
Check ON / OFF cycles of temperature controller |
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It is important that All heaters should be used with appropriate, approved and precise temperature control/sensor device(s) |
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The smallest amount of contamination can cause electrical shorts creating heater failure | |
Before installation & during operation, the outer surface of the barrel and inside surface of band heater must be cleaned & should be free of all contamination |
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Serrated edges may begin to collapse and thrust outwards | |
Tighten the Allen bolt until the serrated edges become firmly in direct contact with the barrel |
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Incorrect wiring and loose contacts leads to sparks resulting in fire or heaters failure | |
Keep all electrical connections properly protected to avoid electrical hazards to machine operators |
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Terminals not well insulated and protected from moisture | |
Ensure that the terminals are well insulated and protected since the heater terminals are prone to attracting moisture |
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Use of substandard raw material & manufacturing defects | |
Standard raw material should be used & without any manufacturing default |
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Combustible gases or vapours | |
Avoid using heaters in an atmosphere containing combustible gases or vapours |
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Incorrect wiring | |
Electrical wiring on any type of heaters should be done by a qualified person complying with local electrical codes |
| Address
: Excel Heaters Pvt. Ltd., 122, Andheri Industrial Estate, Veera Desai Road,
Andheri (West), Mumbai - 400 053, India. Tel.: 91-22-26730888 , 26731171-72 | Fax: 91-22-26731173 | E-mail : excelheaters@vsnl.net, sales@excelheaters.com |
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| Copyright © 2007 Excel Heaters Pvt. Ltd. All Rights Reserved. |