Tubular Heaters are the most versatile and widely used source of electric heat for industrial, commercial and scientific applications. Tubular Heaters are available in several diameters, lengths and sheath materials, these heaters can be formed into virtually any shape and can be brazed or welded to any metal surface.
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Tubular Heaters
A computer-designed helical coil of 80% Nickel 20% Chromium alloy resistance wire is fusion welded to the nickel-coated steel terminal cold pin. This coil assembly is precisely stretched and centered in the element metal sheath, which is then filled with Grade “A” Magnesium Oxide powder (MgO). The filled tube is then compacted by a roll reduction mill into a solid mass, permanently stabilizing the coil in the center of the tube while providing excellent heat transfer and dielectric strength between the coil and the sheath.
Finned Tubular Heaters
Finned Tubular elements are normally used in forced or free convective air applications at low to medium temperatures. Typical applications are for heating indoor clean air from ambient conditions up to 250/275°F for steel finned units & to 550°F for stainless fins. Steel finned heaters can be operated up to 750°F on sheath and stainless steel finned heaters used up to 1200°F (1000°F UL limit) sheath temperatures. Finned tubular elements are safer to operate than open coil heaters as the risk of fire from combustible particles in the flow stream and electrical shock is minimized.
Nextflex Flexible Tubular Heaters 
Nextflex’s robust design is engineered with a flexible solid casing that stays in the groove, yet is easy to install. These Flexible Tubular Heaters are also engineered with an inner layer of highly compressed copper powder, giving them increased durability while maintaining flexibility. Nextflex is conveniently marked at both the center and the cold sections for visual verification during installation. Made in the USA, versatile Nextflex replaces formed tubular heaters for optimized thermal transfer and improved process performance.
NextFlex Tubular Heaters – PDF