WATLOW Coil and Cable Heaters


Watlow specialty heaters are designed for thermal applications where high performance is required, and fast response and uniformity are essential.

Specialty heaters from Watlow have design flexibility to meet different applications requiring different construction methods. This flexibility allows the heaters to be configured in a variety of shapes and sizes depending on the application.

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Product Description

Product Description

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.

Different applications require different construction methods, including one, two or four resistance wires; parallel coil or straight wire; drawn or swaged sheaths; with or without internal thermocouples; leads exiting from one or both ends, and round, rectangular or square cable cross sectionals.

Whatever the application, the Watlow coil heater and cable heater can be shaped to fit.

Specification

Specification

Material Maximum Operating Temperatures Maximum Watt Densities
°F °C W/in2 W/cm2
304 stainless steel 1200 650 30 4.6
Alloy 600 1200 650 30 4.6
  • Continuous operating temperatures to 1200°F (650°C) with intermittent operating periods achieving up 1500°F (815°C) dependent on the type of element wire used
  • Sheath watt densities on the cable to 30 W/in² (4.65 W/cm²), and as high as 75 W/in² (11.62 W/cm²) subject to factory approval
  • Maximum voltage to 240V
    • Applications

    Applications

  • Plastic injection molding nozzles
  • Semiconductor manufacturing and wafer processing
  • Hot metal forming dies and punches
  • Sealing and cutting bars
  • Medical, analytical and scientific instruments
  • Restaurant and food processing equipment
  • Cast-in heaters
  • Laminating and printing presses
  • Air heating
  • Textile manufacturing
  • Heating in a vacuum environment
    • Features & Benefits

    Features & Benefits

    Features Benefits
    High ductility
  • Allows the heater to be cold-formed into almost any shape
    		•
    Low mass
  • Allows for quick response in both heating and cooling
    		•
    Constructed with no open seams
  • Provides the capability of operating in unusual environments, including cryogenic and sub-freezing temperatures, high vacuum, gaseous and liquid immersion heaters
  • Decreases opportunity for corrosion
    		•
    Constructed of standard 304 stainless steel, optional 316 stainless steel or Alloy 600
  • Provides high-temperature corrosion and oxidation resistance along with ideal expansion properties
    		•
    Heater sheath can be brazed
  • Allows the permanent attachment of mounted fittings to the heater, contact your Watlow representative
    		•
    Sizes ranging from 0.040 in. (1.02 mm) to 0.188 in. (4.8 mm) diameter
  • Delivers a lot of heat into a tiny space
    		•
    Internal construction options
  • Allows for internal thermocouples and no-heat sections (not available in all sizes)
    		•
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