Process Heating System


  • Immersion and Circulation Heaters

    Immersion and Circulation Heaters


    Immersion Heaters

    Watlow’s immersion heaters are designed primarily for direct immersion in liquids such as water, oils, solvents, process solutions, and molten materials as well as air and gases. By generating all the heat within the liquid or process, these heaters are virtually 100 percent energy efficient. These versatile heaters can also be formed and shaped into various geometries for radiant heating and contact surface heating applications. UL® and CSA component recognized elements are available.

    Circulation Heaters

    Watlow’s circulation heaters are compact heating systems for fluids and gases. These heaters are ideal for applications such as purified and inert gases, supercritical fluids and liquids like de-ionized water for use in semiconductor and electronics industries as well as for general liquid and gas heating applications.

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  • Band & Nozzle Heaters

    Band & Nozzle Heaters


    Band Heaters

    Watlow’s line of band/barrel heaters are available for fast delivery and can be easily installed into original equipment manufacturer (OEM) and end user applications. This variety of heaters allows the user to specify the construction needed to result in the best heat solution for them.

    Nozzle Heaters

    Watlow offers a full line of hot runner nozzle heaters for the plastics industry as well as slip-on heaters for the medical and analytical industries. While every heater has a unique set of capabilities, each nozzle heater is designed to meet specific application requirements. Whether an application requires high performance, high temperature or high watt density Watlow has the heater to fit the application.

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  • Cartridge Heaters

    Cartridge Heaters


    Watlow designed and manufactured the first swaged cartridge heater and revolutionized the heating element industry. With premium materials and tight manufacturing controls, Watlow’s cartridge heaters (insertion heaters) provide superior heat transfer, uniform temperatures, resistance to oxidation and corrosion and long life even at high temperatures. Customers benefit from Watlow’s custom designs, on-time delivery, quality and technical assistance.

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  • Cable Heaters

    Cable Heaters


    The versatile Watlow coil/cable heater can be formed into a variety of shapes. Cable heaters are small diameter, high-performance units, fully annealed and readily bent to a multitude of configurations. The cable heater can be formed into a compact, coiled nozzle heater supplying a full 360 degrees of heat with optional distributed wattage. A straight cable heater can snake through an equipment application. Flat spiral configurations can be used in high-tech manufacturing while a star wound cable can be used for air and gas heating. Whatever the application, the Watlow cable heater can be shaped to fit.

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  • Ceramic Fiber Heaters

    Ceramic Fiber Heaters


    Ceramic fiber heaters offer some of the highest temperature heating element capabilities in the Watlow family of heaters. Heating units constructed of ceramic fiber insulation isolate the heating chamber from the outside. Ceramic fiber heaters are extremely low mass, high insulation value units with self-supported heating elements. Many applications can benefit from the convenience of the heating element and insulation combined into one package. Its lightweight, low-density properties make it ideally suited for high temperature applications requiring low thermal mass.

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  • Advanced Sintered Ceramic Heaters

    Advanced Sintered Ceramic Heaters


    The ULTRAMIC® ceramic heaters from Watlow® are designed for thermal applications where the high performance of an advanced ceramic heater is required to ensure optimal effectiveness of the equipment and process. ULTRAMIC ceramic heaters are constructed of aluminum nitride (AlN) and incorporate a thermally matched proprietary heating element that provides maximum performance in challenging applications. AlN is especially suitable for applications requiring a clean, non-contaminating heat source. Additionally, the excellent geometric stability ensures consistent part-to-part thermal contact during heating cycles.

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  • Flexible Heater Foils and Pads

    Flexible Heater Foils and Pads


    Flexible heaters from Watlow are thin, bendable and shaped to fit almost any type of equipment. Heat can be applied to the most complex shapes, geometries, curves and pipes conceivable without sacrificing efficiency or dependability. Excellent heat transfer results from the heater’s thin design and direct bonding to an application. Flexible heaters provide fast heat-up and cool-down rates, uniform heat distribution and high watt densities.

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  • Strip Heaters

    Strip Heaters


    Watlow’s strip heaters are a versatile solution for a number of applications. They can be bolted to a solid surface for freezing and moisture protection, food warming and other applications. These heaters make use of the most advanced heat construction techniques.

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  • Tubular Heaters

    Tubular Heaters


    Single and double-ended tubular heaters lend themselves to virtually the entire range of immersion and air heating applications. They have a variety of mounting and termination options that make them ideal for industrial applications. Watlow® tubular heaters are UL® and CSA component recognized up to 240V.

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  • Heater System Capabilities

    Heater System Capabilities
    Heater System Capabilities


    Watlow’s reputation has been built on its core competencies: electric heating and control application expertise coupled with innovative products and solutions for customers. From a systems perspective, Watlow provides the following


    • Matched set process heater assembly and control panel system
    • Multi-heater and multi-vessel “stacked” heater systems
    • Heater, vessel (or ducting) and control panel interconnected and skid mounted
    • Integration of process temperature sensors, switches, sight glasses, etc.
    • Tubular, ceramic fiber, MULTICELL TM and radiant heater technologies
    • Design pressures up to 4500 psi(300 bar) +
    • Design temperatures from cryogenic to 900 °C hot gas generators
    • Special packaging and crating for shipment anywhere in the world
    • Complete I&M packages, drawings and nameplates
    • On-site technical review, training, commissioning service available
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