The coils can never touch each other and short out. Extra heavy leads are brought out and insulated away from the heater core to provide trouble free connections.
Immersion heaters virtually eliminate melt loss in melting and holding furnaces since the refractory is never super-heated, the refractory life over glow bar and gas fired reverb holding and melting furnaces is at leased doubled. Corundum is eliminated in properly designed immersion heated furnaces.
Immersion heaters do not super-heat the surface of the molten metal as do glow bar and gas fired reverb furnaces. Super-heating the surface of molten aluminum greatly increases the absorption of hydrogen into the molten aluminum and the creation of aluminum oxides at the surface, many of which become suspended in the melt or sink, only to be riled up from time to time.
When used in holding furnaces, immersion heaters more efficiently transfer heat into dip wells and degassers since the heat does not have to pass through an insulating layer of oxides on the surface of the melt and the heat source is beneath any separating refractory arch and it is in close proximity to the dip well or degassing head.
Power requirements are typically twenty five to thirty percent less than glow bar furnaces and the reduction in melt loss and improved metal quality over glow bar and gas fired reverb furnaces is significant. Coupling these advantages with extended refractory life provides even greater savings for you, the user. High efficiency board lined furnaces can be used with immersion heaters for an additional ten percent energy savings.
Immersion tube heaters are used in the following:
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Holding furnaces (inline and free standing)
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Degassing stations (inline and free standing)
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Low-pressure furnaces
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Molten metal filters
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High purity melters
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Automatic pouring systems
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Ladle melting furnaces (crucible and refractory lined)
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Temperature Boosters in dip-wells
