Description

The Spiral Electric Heater Tube is a high-performance thermal component designed to deliver maximum power in a minimal footprint. By forming the heating tube into a precise helical configuration, this element provides a long heating surface within a short linear space. It is ideal for integration into compact machinery, narrow tanks, or heating systems where space constraints prohibit the use of standard straight tubes.

Core Engineering Specifications

Optimized Helical Geometry: The spiral is formed using CNC bending technology to ensure a consistent pitch and diameter. This precision prevents coil deformation under high temperatures and ensures even heat distribution.
Material Excellence:
Sheath: Available in Stainless Steel 304/316, Copper, or Incoloy, selected based on the operating environment to resist oxidation and corrosion.
Filler: High-density Magnesium Oxide (MgO). Compacted to a density of >3.3 g/cm³ using hydraulic isostatic pressing, eliminating air pockets and ensuring superior thermal conductivity.
Resistance Wire: High-grade Nickel-Chromium (NiCr) alloy with excellent creep resistance for long life at high temperatures.
Thermal Efficiency: The spiral design increases the surface area by up to 40% compared to a straight tube of the same length, resulting in faster heat transfer and lower surface temperatures.

Advanced Quality Assurance & Testing Protocol

To ensure absolute reliability and safety, every Spiral Electric Heater Tube undergoes a rigorous, multi-stage inspection process:
Dimensional & Visual Inspection: Verification of spiral pitch, outer diameter, and straightness of terminal pins using precision calipers and optical comparators.
Electrical Continuity & Resistance Check: Each phase is tested to ensure the resistance value matches the design specification within a ±1% tolerance, guaranteeing accurate power output.
High-Potential (Hi-Pot) Dielectric Test: A critical safety test where 2000V AC + 2x rated voltage is applied for 1 minute. This ensures the insulation can withstand voltage surges without breakdown.
Insulation Resistance Test (Megger Test): Conducted at 500V DC, the insulation resistance must exceed 500 MΩ at ambient temperature. This confirms the MgO core is completely dry and free of moisture.
Leakage Current Test: For final assembly verification, ensuring the leakage current is <0.5mA at rated voltage, meeting international safety standards.
Pressure Testing (Optional): For high-pressure applications, the tube can be subjected to 1.5x the maximum operating pressure to verify the integrity of the welds and sheath.

Primary Applications

Air Duct Heating: Used in HVAC systems and industrial dryers where the spiral shape promotes turbulence and even air heating.
Water Heaters: Ideal for compact storage tanks and instant heating systems.
Packaging Machinery: Heating elements for sealing bars and forming dies where space is limited.
Laboratory Equipment: Used in sterilizers and environmental chambers requiring precise temperature control.