High-quality stainless steel immersion water heater. Corrosion-resistant, fast heat transfer, safe operation. Ideal for tanks & boilers. Factory direct.

Submersible electric heating tube for water, oil & corrosive liquids. Custom voltage(12-660V), power(1-200kW), length. Durable MGO insulation.

Industrial immersion heater with flange or thread connection. Overheat protection, high efficiency, easy maintenance. OEM available. 

Product Overview

The Immersion Water Heater (also known as submersible electric heating tube or tubular electric heater) is a heating device that immerses the electric heating element directly into the liquid medium for efficient heat transfer. It is widely used in water tanks, boilers, storage vessels, chemical reactors, and other industrial applications for heating water, oil, acidic/alkaline solutions, and various liquid media.

Technical Specifications

📐 Structural Features

• Heating Core: High-temperature resistance alloy wire as the heating element, filled with high-purity MgO powder for insulation and thermal conductivity, compacted through a compression process

• Sheath Tube: Metal protective tube (stainless steel, copper, titanium, Incoloy, etc.) – corrosion-resistant and high-temperature tolerant

• Connection Types:

  • Flange connection – DN80 to DN200 (custom sizes available)

  • Thread connection – G, NPT, BSPP 1"–2" (male/female)

  • Waterproof rubber head – for direct tank submersion (portable/cord-type)

    
    

  
  

• Optional Features:

  • Built-in temperature sensor (thermocouple/RTD)

  • Built-in thermostat/thermal cut-off

    
    

    
    

    
    

    
    

    
    

     

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  • Key Advantages

    
    

1. High Thermal Efficiency – Direct immersion in liquid ensures rapid heat transfer with minimal loss

2. Wide Material Selection – Suitable for fresh water, seawater, acidic/alkaline solutions, oils, and corrosive media

3. Safe & Reliable – Built-in overheat protection, low-level shutdown, and anti-dry-burn design

4. Easy Installation & Maintenance – Flange or thread mounting; heating core can be replaced without draining the tank

5. Fully Customizable – Voltage, wattage, tube diameter, shape (straight/U-shaped/M-shaped/custom bent), and sheath material – all tailored to your requirements

6. Long Service Life – Premium stainless steel and specialty alloys resist oxidation and corrosion, even in high-humidity and high-temperature environments

 Important Operating Notes

• The heating zone must be fully submerged in liquid at all times – DO NOT operate dry

• Operating voltage must not exceed 1.1× the rated voltage

• Proper grounding is required for safe operation

• Regularly remove scale/carbon deposits from the tube surface (especially in hard water applications)

  
  

 Typical Applications

Custom Order Information

To request a custom quote, please provide us drawing or draft with details as following:

Packing & Shipping

• Standard Packaging:  outer carton 

• Custom Packaging: Available upon request for large orders

• Lead Time: 15–35 working days (depends on quantity and customization level)

• Shipping: By sea, air, or express (DHL/FedEx/UPS) available