Watlow 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.

Watrod Tubular Heater

Watrod Single/Double-Ended Heaters

Available in single- or double-ended termination styles, the versatile and economical WATROD™ tubular heating element from Watlow® lends itself to virtually the entire range of immersion and air heating applications. The single-ended WATROD tubular design has both terminals at one end. The opposite end is sealed. Flexible lead wires are 12 in. (305 mm) crimp connected to the terminal pin and have silicone-impregnated fiberglass oversleeves.

The double-ended WATROD, with its round cross-sectional geometry, is highly adaptable for bending—especially when bending is performed in the field. Watlow’s double-ended MULTICOIL™ tubular elements offer various combinations of resistor coils and thermocouples inside one sheath. They have the ability to sense the heater’s internal temperature accurately every time, or offer three-phase capability in one element. Both single- and double-ended WATRODs share many construction features delivering long life—the resistance wire is centered in the heater sheath and electrically insulated with compacted, high-grade magnesium oxide for superior heating performance. WATROD heating elements have a variety of mounting and termination options making them highly popular among industrial customers.

  • Minimizing coking and fluid degrading
  • Enhancing the flow of fluid past the element's surface to carry heat from the sheath
  • Improving heat transfer with a significantly larger boundary layer allowing much more liquid to flow up and across the sheath's surface Firebar elements are available in single- and double-ended constructions with one inch or 5⁄8 inch heights. These two configuration variables make it possible to use FIREBAR elements instead of round tubular elements in virtually all applications.

Single-Ended Watrod Performance Capabilities

  • Watt densities up to 45 W/in2 (6.9 W/cm2)
  • UL® and CSA component recognition up to 240VAC
  • Alloy 800/840 and stainless steel sheath temperatures up to 1200°F (650°C)

Double-Ended Watrod Performance Capabilities

  • Watt densities up to 120 W/in2 (18.6 W/cm2)
  • UL® and CSA component recognition up to 600VAC
  • Alloy 800/840 sheath temperatures up to 1600°F (870°C)
  • Stainless steel sheath temperatures up to 1200°F (650°C)
  • Steel sheath temperatures up to 750°F (400°C)
  • Alloy 800 sheath temperatures up to 1800°F (982°C)
 

Features and Benefits

  • Precision wound nickel-chromium resistance wire distributes heat evenly to the sheath for optimum
  • heater performance
  • Silicone resin seals protect against moisture contamination and is rated to 221°F (105°C)
  • MgO insulation filled sheath maximizes dielectric strength, heat transfer and life
  • Standard sheath materials are available in steel, 304 and 316 stainless steel, alloy 800/840 and alloy 600
  • 53 standard bend formations to allow forming of the heating element to the application – spirals, compound bends, multi-axis and multi-plane configurations
  • Stainless steel studs are fusion welded to terminal pins for mechanical strength
  • Popular termination, mounting and moisture seal options available

Download Watrod Tubular Heater Datasheet


Firebar Tubular Heater

Firebar Single/Double-Ended Heaters

Firebar heating elements provide added heating performance over standard round tubular heating elements—especially for immersion applications in petroleum-based liquids requiring high kilowatts. The Firebar’s unique flat surface geometry packs more power in shorter elements and assemblies, along with a host of other performance improvements. These include:
  • Minimizing coking and fluid degrading
  • Enhancing the flow of fluid past the element's surface to carry heat from the sheath
  • Improving heat transfer with a significantly larger boundary layer allowing much more liquid to flow up and across the sheath's surface Firebar elements are available in single- and double-ended constructions with one inch or 5⁄8 inch heights. These two configuration variables make it possible to use FIREBAR elements instead of round tubular elements in virtually all applications. 


Single-Ended Firerod Performance Capabilities

1 Inch
  • Watt densities up to 60 W/in2 (9.3 W/cm2)
  • Alloy 800 sheath temperatures up to 1400°F (760°C)
  • 304 stainless steel sheath temperatures up to 1200°F (650°C)
  • Voltages up to 240VAC
  • Amperages up to 48 amperes per heater or 16 amperes per coil
 
5/8 Inch
  • Watt densities up to 80 W/in2 (12.4 W/cm2)
  • Alloy 800 sheath temperatures up to 1400°F (760°C)
  • Voltages up to 240VAC
  • Amperages up to 16 amperes per heater

Double-Ended Firerod Performance Capabilities

1 Inch
  • Watt densities up to 120 W/in2 (18.6 W/cm2)
  • Sheath temperatures up to 1400°F (760°C)
  • 304 stainless steel sheath temperatures up to 1200°F (650°C)
  • Voltages up to 240VAC
  • Amperages up to 48 amperes per heater or 16 amperes per coil

5/8 Inch
  • Watt densities up to 90 W/in2 (13.9 W/cm2)
  • Alloy 800 sheath temperatures up to 1400°F (760°C)
  • Voltages up to 240VAC
  • Amperages up to 32 amperes per heater or 16 amperes per coil

​Download the Firebar Tubular Heater Datasheet


Finbar Single-Ended Heaters

Finbar Single-Ended Heaters

Composed of aluminized steel fins press-fitted to a one-inch single-ended FIREBAR element, the FINBAR finned tubular heater is designed to improve heat transfer to the air and permits putting more power in tighter spaces—like forced air ducts, dryers, ovens and load bank resistors. Heat transfer, lower sheath temperature and element life are all maximized by its finned construction. Installation is simplified by terminations exiting at one end and mounting accommodations on both ends.

Performance Capabilities

  • Watt densities up to 50 W/in2 (7.7 W/cm2)
  • 304 stainless steel sheath temperatures up to 1200°F (650°C)
  • Voltages up to 480VAC
  • Amperages up to 48 amperes per heater or 16 amperes per coil

Features and Benefits

  • Rugged aluminized steel fins provides an increase in surface area to approximately 16 square inches for every linear inch of element length. Fins press fitted to the heating element improve heat transfer to the air
  • Single-ended termination simplifies wiring and installation
  • Stainless steel mounting bracket, welded to the terminal end, supplied with a slotted end allows ease of installation
  • Lavacone seals provides protection against humid storage conditions, moisture retardant to 221°F (105°C)

Download Finbar Single-Ended Tubular Heater Datasheet


Download Tubular Heater Datasheet


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