What Are Tubular Heaters?
Tubular heaters are one of the most versatile and widely used electric heating elements in the industrial world. They consist of a metal tube — usually stainless steel or steel alloy — with a resistance wire inside, filled with magnesium oxide (MgO) powder for insulation and heat conduction. Based in Delhi, Kalka Heater is a trusted manufacturer and supplier of tubular heaters, serving industrial manufacturers across India with high-quality heating solutions.
These heaters can be bent, shaped, and customized into almost any form — straight, U-shaped, coiled, or complex custom profiles — making them suitable for virtually every industrial heating application.
How Do Tubular Heaters Work?
The working principle is simple and highly efficient. A nichrome or iron-chrome-aluminium resistance wire is placed at the center of a metal tube. The tube is then filled with compacted magnesium oxide powder, which electrically insulates the wire while efficiently conducting heat to the outer sheath.
When electricity passes through the resistance wire, heat is generated and transferred outward through the MgO filler to the metal sheath. This heat is then transferred to the surrounding medium — whether air, oil, water, or a solid surface — depending on the application. The result is fast, reliable, and energy-efficient heating for all industrial needs.
Key Features of Our Tubular Heaters
As a Delhi-based manufacturer and supplier, we build every heater to the highest quality standards:
- Flexible Shape Options — straight, U-bent, L-bent, coiled, or fully custom profiles
- Multiple Sheath Materials—steel, stainless steel SS 304, SS 316, Incoloy 800, copper
- Wide Temperature Range—operates up to 850°C depending on sheath material and application
- High Watt Density — available from 5 W/in² to 50 W/in² based on requirement
- Custom Dimensions — any length, diameter, and bend angle as per your specification
- Multiple Voltage Options — 110V, 220V, 240V, 440V, and three-phase configurations
- Various Terminal Types—cold pin, lead wire, screw terminal, or flange-mounted ends
- Moisture and Corrosion Resistant—sealed ends prevent moisture ingress for long service life
Types of Tubular Heaters We Manufacture & Supply
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Straight Tubular Heaters
The most basic form is used in ovens, furnaces, air duct heaters, and immersion applications. Available in standard and custom lengths.
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U-Bent Tubular Heaters
Bent into a U-shape for compact installation in tanks, vessels, and water or oil heating systems. Both legs connect to the same terminal end for easy wiring.
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Finned Tubular Heaters
A tubular heater with aluminum or steel fins attached to the outer sheath to increase the surface area for faster and more efficient air or gas heating.
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Immersion Tubular Heaters
Designed specifically for direct immersion into liquids such as water, oil, acids, or chemicals. Sheath material is selected based on the liquid being heated.
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Coiled Tubular Heaters
Wound into a circular or spiral coil for use in drum heaters, tank heaters, and base plate heating applications.
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Flanged Tubular Heaters
Mounted on a flange for easy installation and removal from tanks and vessels. Commonly used in industrial water heating and oil heating systems.
Applications – Where Are Tubular Heaters Used?
Our industrial tubular heaters are supplied to manufacturers and processors across Delhi, NCR, and all over India:
Ovens and Furnaces
Tubular heating elements are the backbone of industrial ovens, conveyor ovens, and batch furnaces. They provide uniform heat distribution across the oven chamber for consistent product processing.
Air and Gas Heating
Finned tubular heaters are installed in air duct heaters and space heaters to heat moving air or gas streams efficiently in HVAC and industrial process heating systems.
Water and Liquid Heating
Immersion-type heaters are inserted directly into water tanks, boilers, and industrial liquid heating systems for fast and efficient liquid heating.
Oil and Petroleum Processing
Incoloy-sheathed tubular heaters are used for heating oil, bitumen, wax, and other viscous fluids in storage tanks and processing equipment.
Plastic and Rubber Processing
Installed in hot press machines, vulcanizing presses, and drying ovens to maintain stable process temperatures for plastic and rubber manufacturing.
Food Processing and Catering Equipment
Used in commercial ovens, fryers, bain-marie units, and food warming equipment where hygienic and reliable heating is essential.
Chemical and Pharmaceutical Industry
Corrosion-resistant SS 316 or Incoloy-sheathed heaters are used in reactors, vessels, and processing lines where aggressive chemicals or high-purity requirements demand superior material quality.
Textile and Paper Industry
Installed in calendar rollers, drying cylinders, and pressing equipment to provide consistent heat for fabric treatment and paper drying processes.
Why Choose kalka heater – Delhi’s Trusted Tubular Heater Manufacturer & Supplier
- Delhi-Based, Pan-India Supply Our manufacturing facility is located in Delhi, allowing us to offer fast dispatch and reliable delivery to customers across Delhi NCR—including Noida, Gurgaon, Faridabad, and Ghaziabad—as well as all major industrial cities across India.
- Complete In-House Manufacturing From raw tube cutting and wire winding to MgO filling, swaging, bending, and final testing — everything is done under one roof. This ensures consistent quality and faster delivery.
- Custom Fabrication Expertise We manufacture tubular heaters in any shape, size, and specification. Just share your drawing, sample, or technical requirement, and we will produce an exact match.
- Wide Range of Sheath Materials We stock and work with steel, stainless steel (SS 304 and SS 316), copper, and Incoloy 800 sheaths to match the exact demands of your application and operating environment.
- Rigorous Quality Checks Every heater undergoes resistance testing, insulation resistance (IR) testing, and dimensional inspection before dispatch. We ensure zero-defect delivery on every order.
- Competitive Factory Pricing As a direct manufacturer based in Delhi, we eliminate middlemen and offer you the most competitive prices without compromising on quality or delivery timelines.
How to Select the Right Tubular Heater
Getting the right specification is key to maximizing heater performance and lifespan:
- Sheath Material: Choose based on the medium being heated—SS 304 for air/dry heat, SS 316 for water/mild chemicals, and Incoloy 800 for high temperatures or aggressive environments.
- Watt Density: Keep watt density as low as possible for longer heater life. Higher watt density is only used when space is limited or fast heat-up is critical.
- Shape and Bend: Share your installation dimensions, and we will design the optimal bend profile for maximum surface coverage and heat efficiency.
- Voltage and Wattage: Match to your available power supply and calculate required wattage based on load, target temperature, and heat-up time.
- Terminal Configuration: Select cold pin, lead wire, or flange terminals based on your electrical panel and installation requirements.
Maintenance Tips for Longer Heater Life
- Never run tubular heaters in air at watt densities rated for liquid immersion—it will cause rapid burnout
- Always ensure proper electrical connections to avoid loose terminal heating
- For immersion heaters, maintain minimum liquid level above the heater at all times
- Periodically check for scale or deposit buildup on immersion heaters and clean regularly
- Inspect lead wires and terminals for signs of discoloration or damage during scheduled maintenance
Conclusion
Tubular heaters are a versatile and reliable heating solution for a wide range of industrial applications, from ovens and furnaces to liquid heating, air heating, plastic processing, and chemical industries. Their customizable shapes, sheath materials, wattages, and terminal configurations make them suitable for different operating environments and heating requirements.
Choosing the right tubular heater manufacturer and supplier is important for achieving efficient heating, longer service life, and consistent performance. Kalka Heater provides standard and custom tubular heating elements designed according to specific application requirements, including dimensions, wattage, voltage, shape, and sheath material.
Whether you need a replacement heating element or a completely customized solution, selecting the correct specification can help reduce downtime and improve overall heating efficiency. Contact Kalka Heater today to discuss your requirements and get the right tubular heater for your industrial application.
Frequently Asked Questions
Q1. What is the maximum operating temperature of a tubular heater?
Depending on sheath material and application, they can operate up to 850°C.
Q2. Can tubular heaters be made in custom shapes?
Yes, we manufacture heaters in straight, U-bent, coiled, L-bent, and fully custom profiles as per your drawings or samples.
Q3. Which sheath material is best for water heating?
SS 316 or Incoloy 800 is recommended for water and chemical immersion due to their superior corrosion resistance.
Q4. Do you supply tubular heaters across India from Delhi?
Yes, we supply pan-India from our Delhi facility with fast dispatch to all major industrial cities and states.
Q5. How long do tubular heaters last in continuous operation?
With correct specification, proper installation, and regular maintenance, tubular heaters can last 3 to 7 years in continuous industrial use.
