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This section provides an overview for heating coils as well as their applications and principles. Also, please take a look at the list of 23 heating coil manufacturers and their company rankings. Here are the top-ranked heating coil companies as of December, 2024: 1.Quintel, Inc., 2.Keith Company, 3.Industrial Heater Corp..
Table of Contents
A heating coil is a coil utilized in induction heating.
Heating is achieved by placing the object to be heated inside the coil. The shape, number of windings, and diameter of the heating coil vary depending on the heating requirements, such as the characteristics and shape of the object to be heated and the area to be heated. It is important to optimize the heat distribution by designing a coil that meets the requirements.
A coil design that meets requirements is also necessary to maximize work efficiency by making it easy to insert and remove the object into and from the coil. Furthermore, during heating, the heating coil itself is indirectly heated by the heat emitted from the object. Therefore, it is common to have a structure that can be constantly cooled.
Heating coils are used in induction heating, and they are used in situations where precise and controllable heat treatment is required without direct contact with the object. Specific examples of industrial applications are as follows:
Heating coils are flameless, which not only reduces carbon dioxide and environmental impact but also ensures clean and waste-free heat treatment. A well-known induction cooktop is a cooking appliance that applies this characteristic to ordinary households.
The principle of a heating coil is that a coil is connected to an AC power source, which generates magnetic field lines around the coil to heat the object. This method of heating by electromagnetic induction is called "induction heating." There are two types of induction heating methods:
In induction heating, a conductive object is placed inside a heating coil and an electric current is applied to the object, which itself generates heat. This is the "direct heating method."
This heating method uses a mechanism in which eddy currents flow in the object in a direction that prevents the magnetic flux from changing, and Joule heat is generated due to electrical resistance. The eddy currents are larger near the surface and smaller toward the interior. This is called the "proximity effect," and the direct heating method is suitable for surface heating.
When heating insulators such as ceramics with a heating coil, the object is placed in a conductive container, and the container is heated directly, causing heat transfer and heating the object. This is the "indirect heating method."
In this heating method, the heating element and the object are in contact with each other, or the heating element and the object are separated. The latter is called far-infrared heating because infrared rays heat the object.
The shape of the heating coil is not simple, as the optimum one is selected according to the dimensions and shape of the object. A wide variety of coils exist, such as an outer surface coil in which the product is inserted inside the coil when heating the outer surface of a shaft, or an inner surface coil in which the coil is inserted when heating the inside of a steel pipe or other object.
For example, the high-frequency quenching method using induction heating includes the "stationary one-shot quenching method," in which the object is heated without moving, and the "moving quenching method," in which the object is sequentially quenched while moving. The heating coils used are different for each method.
In the "in-situ one-shot quenching method," heating coils are manufactured according to the shape of the object, so they must be prepared according to the type of product. The shape of the heating coil is important, and experience and know-how are required for design and fabrication.
However, the advantage of this method is that even complex shapes can be heated uniformly, and the time required for heating can be shortened compared to the moving quenching method. The moving quenching method, on the other hand, uses single or multiple coils. The shape is simpler than that of the stationary one-shot quenching method and is selected in consideration of the shaft diameter and length of the object.
When used for quenching, the structure is provided with a quenching water jet. This is because the heated object needs to be cooled rapidly.
There are two types of water jets:
The type that injects cooling water from inside the heating coil has a structure that allows both the cooling of the heating coil and the object with the quenching water. The object can be cooled efficiently since it can be cooled directly from the heating point, but in most cases, the shape is complicated.
*Including some distributors, etc.
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Quintel, Inc., establised in 1994, located in Schererville, Indiana, is a manufacturer of heat exchangers and radiators. They specialize in the reconditioning, repair, and remanufacture of heat exchangers from original specs and the reselling of OEM heat exchangers. These heat exchangers are widely used in industries such as food, dairy, beverage, and pharmaceutical industries in hygienic production process. The company follows a strict quality assurance in handling equipments and also provides a one year warranty on all workmanship and repairs of heat exchangers.
Liberty Mechanical Contractors, Inc. is an American mechanical service contractor and steel manufacturer shop based in Newark, New Jersey, founded in 1973. The company offers on-site mechanical installation, rigging, dismantlement, and refurbishment services, specializing in chiller, boiler, and utility pipe systems. They possess welding and steel part fabrication capabilities and offer emergency services 24/7. The company operates in New York and New Jersey, is an NJ DPC approved public works contractor, and provides service to pharmaceutical, chemical, food, paper, and wastewater treatment industries.
Magneforce Inc. was founded in 1986 and operates in Warren, Ohio, as a designer and manufacturer of induction heating systems and individual components. The company builds all the necessary components for induction heating systems. Their induction heaters are capable of repeatability and control while maintaining a constant output of power regardless of voltage shifts. Their heating coils allow for controlled and steady heating around and inside the desired part. All equipment can be used for brazing, soldering, and melting, among other applications in industrial, medical, and scientific processes. The company also offers no-cost testing and product evaluation of individual parts.
Industrial Heater Corp (IHCO), established in 1953, is a manufacturer and supplier of Band Heaters for industrial processing based in Cheshire, USA. With a rich history dating back to the post-World War II era, IHCO has been a preferred choice for Original Equipment Manufacturers in the plastics industry. Their patented Ceramic-Insulated Band Heaters garnered global recognition, especially in the injection molding revolution. Over the years, IHCO expanded internationally, providing heaters to manufacturers worldwide. The company has a diverse customer base across industries like chemicals, pharmaceuticals, and packaging.
Tempco is based in Wood Dale, Illinois and has been in business since 1972. Tempco is a manufacturer of many types of heating elements and thermocouples with design variations. Tempco is ISO 9001:2015 certified. Temco’s electric heaters and elements include band heaters, cartridge heaters, cast-in heaters, ceramic fiber heaters, coil and cable heaters, drum heaters, enclosure heaters, flexible heaters, heat trace cable, heated hose and tubing, infrared heaters, process heaters, shroud systems, strip heaters, tank heaters, and tubular heaters. Tempco also sells various application accessories and wiring accessories.
Heat Exchange and Transfer, Inc. was founded in 1968 and is headquartered in Carnegie, Pennsylvania. The company is a designer and manufacturer of custom, made-to-order heat transfer systems, serving industries such as aerospace, automotive, textiles, pharmaceuticals, and packaging. The company’s two product divisions are Direct Heating and Indirect Heating of Process Equipment. Direct Heating includes open coil heaters, flanged immersion heaters, unitary storage tank heaters, and stand-alone circulation heaters. Indirect Heating of Process Equipment includes extruders, mixers, ovens, dryers, and other equipment and machinery.
Markair, Inc. was founded in 1988 in Jacksonville, Florida. Markair is a consultant and manufacturer’s representative offering services for industrial manufacturing, ship yards, power plants, water & wastewater, and food manufacturing among other industries. Markair serves customers with ability to maintain OSHA compliance, project budgets and appropriations, ascertain equipment specifications, create applications and maintenance solutions, create custom-designed equipment, provide turn-key installation, perform field surveys of existing systems to determine performance, and offer recommendations for ventilation system designs. Markair also offers full products lines to fulfill orders for equipment and system designs and installation.
Keith Company, started in 1954 and based in Pico Rivera, California, is an ISO 9001-certified manufacturer of thermal process equipment used to produce parts. Its products include furnaces, ovens, and kilns, and the company also has a spare part and a service business to provide a full range of technical services, including emergency repairs, control system modernization, and energy efficiency upgrades. The company’s dual chamber metal furnaces have an upper chamber used for hardening, which can go up to 2250°F, and a lower chamber used for tempering/aging/drawing, which can go up to 1250°F.
Metafin Supply company was founded in the 1980s and is headquartered in Volo, Illinois, and is a distributor of metal finishing and electroplating equipment and supplies for the surface finishing industry. Metafin Supply offers a range of machines and parts. Machine listings include pumps, filtration systems, centrifugal dryers, and heaters. Parts and components include cartridges, individual chemicals, tank magnets, and dipping baskets. Items or parts not present on the website may be available upon request by email or phone.
Waage Electric, Inc., which was established in 1908, is a US electric heating manufacturer based in Kenilworth, New Jersey. The company produces hot plates, melting pots, various heaters, coat tanks, and wax droppers for a wide range of commercial and industrial applications, such as technology, hardware manufacturing, and product assembly. They are commonly used for the production of batteries, package sealing, product coating, and dying. Additionally, the company has national and international distributors available to service customers worldwide.
CIC Pittsburgh LLC, founded in 1999, is a supplier and service provider of hot galvanizing equipment and heat-treating furnaces used in construction, mining, and agriculture. The company is located in Pittsburgh, PA, and offers services, including supplying and installing new equipment, inspections, upgrades, and repairs. They also provide supporting equipment for furnaces enclosures, rack handling, and gas heat recovery. The establishment is a member of the Forging Industry, American Galvanizers, and the Association for Iron & Steel Technology.
R.L. Craig Company, Inc. was founded in 1955 and is headquartered in Louisville, Kentucky. R.L. Craig Company is a distributor of HVAC and related products for residential, commercial, and industrial customers. R.L. Craig Company’s product lines include air distribution such as displacement ventilation and clean room exhaust systems, louvers and dampers such as fire & smoke dampers, vibration & noise control such as floating floor systems, duct systems such as acoustical duct, dust & filtration systems such as oil mist collectors, heating & cooling equipment such as gas unit heaters, fans such as utility set fans, and other equipment such as laboratory air flow controls.
Sushma Heaters, founded in 1990 with headquarters in India, is a manufacturer of heating components and accessories. The company's product line includes heating elements, thermocouples, tubular water immersion heaters, ceramic band heaters, and industrial powder coating ovens. These products are used in various manufacturing and process manufacturing applications, such as in the pharmaceutical, food processing, ceramics processing, and chemical processing markets, among many others. The company's manufacturing is complemented by the packaging and warehousing of client orders.
Yug Engineering Industries, founded in 2006 with headquarters in India, is a manufacturer of industrial heating and cooling machines and equipment. The company's product line includes steam heating coils, heat exchangers, ammonia air cooling units, evaporative condensers, and air curtains. These products are used by the industrial and commercial HVAC industry for heating and cooling solutions primarily in commercial spaces and large plants, such as food processing factories, dairy food processing facilities, and many more.
Marathon Heater Pvt Ltd, founded in the year 2007, and based in Rajasthan, India, is a manufacturer and supplier of heating systems. Their product portfolio includes process heaters, component heaters, furnace heaters, heat and sensing control, and heat tracing solutions. The company offers various types of heaters with ISO and other certifications. The products are widely used in manufacturing industries such as rubber, plastic, packaging, building, metal, food, defense, automobile, and labs.
S & P Coil Products Limited, trading as SPC, established in 2004 with headquarters in the UK, is a manufacturer and wholesaler of ventilation equipment. The company's product line includes various heating and cooling components, such as coils, radiant panels, and trench units. Other main product lines include Belgravia fan convectors and air curtains in numerous configurations. These products are used by the HVAC industry primarily for installations in commercial and educational spaces. It also provides bespoke products and complete HVAC system production for larger-scale solutions.
Hotset GmbH, established in 1973 and headquartered in Lüdenscheid, Nordrhein-Westfalen, Germany, is a manufacturer and distributor of thermal engineering products. The company offers thermosensors, temperature control systems, electric coil heaters, hot runner nozzle heating elements, tubular heating elements, and flexible custom temperature control systems. Its products cater to various sectors including plastics processing, tool making, food, and medical technology. Certified under DIN EN ISO 9001:2015, the company also holds UL, CSA, and VDE certifications, ensuring quality and compliance in its product lines.
Classic Coil Company is a manufacturer of wire coils that is headquartered in Bristol, Connecticut and was founded in 1973. The company offers a wide product catalog ranging from industrial, to medical coils, aerospace, and military coils. The product catalog reflects the industries served by the company as well. The company provides valve coils, aerospace coils, electronic smart coils, molded-encapsulated soils, and toroid coils. The winding wire ranges from a size of 2 to 58.
Cemline Corp. is an American manufacturer of tanks and pressure vessels established in 1935 and based in Cheswick, Pennsylvania. The company offers a wide range of tanks, replacement copper or stainless steel tube bundles, pressure vessels built to ASME standards, and packaged water heaters. These are used for storing or heating liquids, and have applications in plumbing, industrial processing, and heating systems. Cemline primarily serves clients in the hospitality, education, and healthcare sectors.
New York Blower Company, founded in 1889, is a manufacturer of industrial fans and blowers made from fiberglass, stainless steel, and aluminum with special coatings. The products include incline fans, centrifugal ventilators, custom fans, axial ventilators, and silencers/flex connectors for applications such as cooling towers, sewer & water tunnels, pollution control, spray booth exhaust, and spark-resistant construction. The company in Willowbrook, Illinois, serves the railroad & locomotive, snow-making, food & beverage, thermal power generation, and microchip industries. The company provides services such as repair & rebuild, engineering analysis, preventive maintenance, aftermarket retrofit, and testing capabilities.
Wattco was founded in 1972 and is headquartered in Lachine, Quebec. Wattco is a manufacturer of electric heating products for use in many utilities including oil and gas, renewable energy, HVAC systems, as well as others. Wattco products include immersion, circulation, inline, flanged, screw plug, pipe, over the side, industrial bore, tubular, finned tubular, strip, finned strip, cartridge, band, silicone rubber, open coil element, duct, finned tubular duct heaters, infrared radiant heaters, as well as other combinations of heaters and control panels.
Founded in 1958, Turnbull Coils is an industrial firm that makes and designs heavy-duty industrial coils and unit heaters. Their coils are custom-built to meet customer specifications and their water heaters run on steam, air, hot water, or chilled water. Their headquarters are in Quebec, Canada, and their goods are used in a number of industries, including textile and steel mills, wood and veneer, automotive, food processing, and electric generating facilities and oil refineries.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Quintel, Inc. |
9.3%
|
| 2 | Keith Company |
6.5%
|
| 3 | Industrial Heater Corp. |
5.6%
|
| 4 | Heat Exchange & Transfer, Inc. |
5.6%
|
| 5 | Magneforce, Inc. |
5.6%
|
| 6 | Markair, Inc. |
5.6%
|
| 7 | S & P Coil Products Limited trading |
4.6%
|
| 8 | Classic Coil Company |
4.6%
|
| 9 | New York Blower Company |
4.6%
|
| 10 | Liberty Mechanical Contractors, Inc. |
4.6%
|
Derivation Method
The ranking is calculated based on the click share within the heating coil page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
12 | 70.6% |
|
India
|
3 | 17.6% |
|
United Kingdom
|
1 | 5.9% |
|
Germany
|
1 | 5.9% |
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