Common Type Double U-Shaped Heating Tube For water Boilers

Double-U-shaped heating tube

Double-U-shaped heating tubes are a common type of electric heating element. They consist of a metal tube filled with thermally conductive and insulating magnesium oxide powder and evenly distributed high-temperature resistance wires. These tubes are connected to a power source via lead wires at both ends, converting electrical energy into heat. They are widely used in heating liquids, acids, bases, salts, and low-melting-point metals, as well as in industrial molds and ovens. These heating tubes feature a simple structure, high thermal efficiency, excellent mechanical strength, strong adaptability, rapid heating, uniform heat generation, and a long service life.

Construction and Principle
Structure: Double-U-shaped heating tubes utilize a seamless metal tube (such as stainless steel or copper) as their outer shell. A spiral of high-quality heating alloy wires is evenly distributed within the tube, and the gaps between the wires and the metal tube wall are filled with crystalline magnesium oxide powder, which has excellent thermal conductivity and insulation properties.
Operating Principle: When current flows through the heating wires, the resistance wires generate heat. This heat is then transferred to the surface of the metal tube through the highly conductive magnesium oxide powder and then to the object or air being heated, achieving heating.

Features:
Simple Structure: This is one of the most basic electric heating elements, featuring a compact design.
High Thermal Efficiency: The high thermal conductivity of magnesium oxide powder ensures efficient heat transfer.
Good Mechanical Strength: The metal tube housing provides excellent mechanical strength.
Uniform Heat Distribution: The uniform distribution of the heating element and its excellent thermal conductivity ensure uniform heating, preventing localized overheating.
Fast Heating: Efficient heat transfer and high power density enable rapid heating.
Long Service Life: High-quality materials and advanced production processes ensure a long service life.

Applications:

Double U-shaped heating elements are widely used in a variety of applications due to their excellent performance:
Liquid Heating
1. Used for heating various liquids such as water, acids, alkalis, and salt solutions.
Low-Melting-Point Metal Heating
2. Suitable for melting low-melting-point metals.
Mold Heating
3. Commonly used for heating and maintaining molds.
Industrial Ovens and Drying Rooms
4. Used as a heat source in various industrial ovens and drying rooms.
Other Equipment
5. Suitable for sealing machines, water boilers, and other equipment.