The innovative heating core of our Ceramic Bobbin Electric Heater for Furnace is masterfully designed with U-shaped, axially aligned end-welded resistance wires, expertly mounted on robust ceramic support frames. Ingeniously lacking any shielding between the inner core and the outer protective sleeve, this superior design ensures excellent heat dissipation. This electric radiant tube boasts an impressive rated working temperature of 1000 degrees Celsius, with resistance wires crafted from either Cr20Ni80 or 0Cr21AI6Nb, allowing the surface temperature to soar up to 1200 degrees. The exceptional design accommodates a peak working temperature of 1000 degrees, with high alumina ceramic parts ensuring stability. The outer protective sleeve is fashioned from premium cold drawn seamless thin-walled heat-resistant steel, using either 1Cr25Ni20Si2 or 1Cr25Ni35Si2. These materials are renowned for their superb high-temperature oxidation resistance, substantial creep strength, and commendable carburizing resistance, culminating in a highly safe design and robust material selection. For the upgraded model, the electric radiation tube reaches a rated working temperature of 1200 degrees, utilizing 0Cr27AI7Mo2 resistance wire, with a surface temperature peaking at 1400 degrees. The maximum short-term operating temperature reaches an impressive 1250 degrees, supported by steel jade porcelain frames. The outer protective sleeve, constructed from Fe Ni CrAI Re alloy, delivers unmatched oxidation resistance, operating seamlessly at 1300 degrees in oxidizing atmospheres, withstanding short-term peaks at 1360 degrees. Perfectly suited for high temperature, low oxygen partial pressure, and SC containing environments.
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