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WATTCO™ cartridge heaters are made of a swaged construction that consists in a high-grade nickel chromium resistance wire wound around a high-quality MgO core that is centered in a stainless steel casing.

Cartridge heaters are used for several heating metal parts and can be fitted with threaded bushings for liquid heating for certain applications. Cartridge heaters will reach metal temperatures of up to 1400 ºF (760 ºC) with the appropriate material, watt density, and fit selections. Maximize element life and value with WATTCO™ cartridge heaters.
Unit of Measure

Specifications

Brands

 N/A WATTCO™

Sheath Length

 N/A 4 in101.6 mm

Voltage

 N/A 120 V

Hole Diameter

 N/A 3/8 in

Sheath Diameter

 N/A 0.372 in

Dimension A (Single Threaded)

 N/A 15.7 mm

Dimension B (Single Threaded)

 N/A 17.2 mm

Dimension A (Double Threaded)

 N/A 15.7 mm

Dimension B (Double Threaded)

 N/A 27.6 mm

Dimension C (Double Threaded)

 N/A 10.4 mm

Standard Taper Pipe Thread

 N/A 1/4" NPT

Resistance Tolerance

 N/A +10 to -5 %

Wattage Tolerance (At Rated Tension)

 N/A +5 to -10 %

Diameter Tolerance (±)

 N/A ±0.002 in

Length Tolerance (±)

 N/A ± 1/16 in. 1.5 % of length

Maximum Sheath Temperature

 N/A 1400 ºF

Key Features

Key Features

 N/A
  • Main components:
    • High-grade nickel chromium resistance wire
    • MgO core
    • Stainless steel casing
    • Stranded leads with silicon-impregnated mica glass insulation
  • Special sizes, wattages, and materials are available upon request

Benefits

Benefits

 N/A
  • Easy and economical to install
  • Designed with first-class materials
  • Maximized heat transfer
  • Easy to maintain
  • Uniform temperatures
  • Built solidly
  • Oxidation and corrosion resistant
  • Durable

Factors

Factors

 N/A Please consider the following factors in order to select the right cartridge heater.
  • Operating temperature
  • Watt density of the heating element
  • Sheath material (corrosive or non corrosive)
    • Temperature of the corrodent
    • Degree of aeration of exposed corrodent
    • Velocity of the corrodent

How to Install Cartridge Heater

How to Install Cartridge Heater

 N/A
  • Make a hole in the section that is to be heated (see Figure 2 to find out about proper hole diameter and tolerance).
  • Ream a smooth hole for contact and for better heat transfer.
  • Extend the hole through the section so that the unit can be driven out if you should need to remove it.
  • If making a through hole is impossible, increase the size of the hole without exceeding the tolerances shown in Figure 2.
  • Reduce the vibration and flexing of the lead wires to prolong service life.
  • Prevent contamination from liquids by protecting the end of the heater.