U Shaped Tubular Heater

U-Shaped Tubular Heater for Industrial Heating

A U-shaped tubular heater is an electric heating element formed into a U-shaped configuration to provide efficient and concentrated heat in industrial equipment. Its compact shape allows the heating element to fit into applications where a straight tubular heater may not provide the required installation flexibility.

U-shaped tubular heaters are commonly used for air, liquid, metal surface, and process heating applications. They can be customized according to tube diameter, heated length, voltage, wattage, material, terminal configuration, and other application requirements.

What Is a U-Shaped Tubular Heater?

A U-shaped tubular heating element consists of a metal sheath surrounding an internal resistance heating wire. The resistance wire is electrically insulated with high-purity magnesium oxide (MgO), which provides electrical insulation while allowing efficient heat transfer from the internal heating element to the outer sheath.

The tubular heater is formed into a U shape so that both heating sections can be positioned within the same installation area. This configuration can provide a practical solution when the available installation space requires a compact or return-type heating element.

How Does a U-Shaped Tubular Heater Work?

The working principle of this heating element is based on electrical resistance heating. When electrical current passes through the internal resistance wire, electrical energy is converted into heat.

The generated heat travels through the magnesium oxide insulation and metal sheath before being transferred to the surrounding material or heating medium. The U-shaped configuration allows the heated sections to be positioned close to each other while maintaining the required electrical and mechanical configuration.

1. Electrical power is supplied to the heating element.
2. Current flows through the internal resistance wire.
3. The resistance wire converts electrical energy into heat.
4. Heat passes through the MgO insulation and metal sheath.
5. The surrounding air, liquid, metal, or equipment component absorbs the heat.

Key Features of U-Shaped Tubular Heaters

Compact U-Shaped Configuration

The U-shaped design provides two heating sections within a single heating element. This can help make better use of available installation space and simplify certain equipment designs.

Efficient Heat Transfer

The tubular construction provides a direct path for heat transfer from the internal resistance wire through the insulation and metal sheath to the surrounding heating medium.

Multiple Sheath Materials

Different sheath materials can be selected according to the operating temperature, corrosion conditions, heating medium, and application environment. Common options include stainless steel and Incoloy materials.

Custom Dimensions

The tube diameter, overall length, heated length, U-bend dimensions, terminal configuration, voltage, and wattage can be customized according to the equipment requirements.

Flexible Terminal Configurations

Different terminal and lead configurations can be provided according to the electrical connection and installation requirements of the heating equipment.

U-Shaped Tubular Heater Specifications

Specification	Available Options
Configuration	U Shape / U Type / Customized
Sheath Material	Stainless Steel 304, 321, 316, 310S; Incoloy 800/840
Tube Diameter	8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, and customized sizes
Voltage	48V, 110V, 120V, 220V, 230V, 240V, 380V
Wattage	Customized according to application requirements
Insulation	High-purity Magnesium Oxide (MgO)
Terminal Options	Customized lead wires, terminals, and connection configurations
Power Tolerance	+5% to -10%
Customization	Available

U-Shaped Tubular Heater Applications

U-shaped tubular heaters can be used in a wide range of industrial heating systems. Their compact configuration makes them suitable for equipment where the heating element needs to return within a defined installation area.

• Industrial heating equipment
• Water and liquid heating
• Air and gas heating
• Heating tanks and containers
• Ovens and drying equipment
• Metal and surface heating
• Process heating equipment
• Industrial machinery
• Customized heating systems

U-Shaped Tubular Heater vs Straight Tubular Heater

The main difference between U-shaped and straight tubular heaters is their physical configuration. A straight tubular heater is installed as a linear heating element, while a U-shaped heating element has two parallel heating sections connected by a return bend.

A straight configuration can be suitable when a long linear heating path is required. A U-shaped configuration can be more practical when the installation area allows both heating sections to be positioned close together.

The correct configuration depends on the available installation space, required heated length, heating medium, electrical specifications, and equipment design.

For other tubular heating configurations, see our
tubular heater solutions.

How to Choose a U-Shaped Tubular Heater

Tube Diameter

The tube diameter should be selected according to the installation space, required heating capacity, mechanical strength, and heat transfer requirements.

Heated Length and U-Bend Dimensions

The heated length and distance between the two legs should match the available installation area. Accurate dimensions are especially important when the heater is installed inside a tank, block, mold, or other equipment.

Voltage and Wattage

Voltage and wattage should be selected according to the available power supply and required heating performance. The required power also depends on the material being heated, target temperature, heat loss, and heating time.

Sheath Material

The sheath material should be selected according to the heating medium, operating temperature, corrosion conditions, and surrounding environment.

Terminal Configuration

Terminal and lead configurations should match the available electrical connection and physical installation requirements of the equipment.

Customized U-Shaped Tubular Heater

Standard heating elements may not always match the dimensions or electrical requirements of industrial equipment. TZ Heater provides customized U-shaped tubular heating elements for OEM and industrial heating applications.

Customization can include tube diameter, overall length, heated length, U-bend dimensions, voltage, wattage, sheath material, terminal configuration, lead length, and other specifications.

Customers can provide drawings, samples, dimensions, electrical specifications, or application requirements when requesting a customized heating solution.

Why Choose TZ Heater?

• Customized U-shaped tubular heater designs
• Multiple sheath material options
• Customized voltage and wattage
• Flexible tube diameters and dimensions
• OEM heating element manufacturing
• Customized terminal and lead configurations
• Technical support for industrial heating applications

Frequently Asked Questions

What is a U-shaped tubular heater?

A U-shaped tubular heater is an electric resistance heating element formed into a U-shaped configuration. It contains an internal resistance wire, electrical insulation, and metal sheath and is designed for various industrial heating applications.

Where are U-shaped tubular heaters used?

U-shaped tubular heaters can be used for air, liquid, metal surface, process, tank, oven, and other industrial heating applications where a compact return-type configuration is suitable.

Can U-shaped tubular heaters be customized?

Yes. U-shaped tubular heaters can be customized according to tube diameter, heated length, U-bend dimensions, voltage, wattage, sheath material, terminal configuration, and other requirements.

What materials are available?

Common sheath materials include stainless steel 304, 321, 316, and 310S, as well as Incoloy materials such as 800 and 840. The appropriate material depends on the operating environment and heating application.

What is the difference between a U-shaped and straight tubular heater?

A straight tubular heater has a linear configuration, while a U-shaped tubular heater has two parallel heating sections connected by a return bend. The appropriate design depends on the installation space and heating requirements.

Request a Customized U-Shaped Tubular Heater

If you need a u shaped tubular heater for industrial air heating, liquid heating, surface heating, or process heating, TZ Heater can provide customized heating elements according to your equipment requirements.

Please provide the required dimensions, voltage, wattage, material, quantity, drawing, or sample when requesting a quotation.

Request a Quote for U-Shaped Tubular Heater