Open Coil Elements

Open coil elements are the most efficient type of electric heating element while also the most economically feasible for most heating applications. Used predominantly in the duct heating industry, open coil elements have open circuits that heat air directly from the suspended resistive coils. These industrial heating elements have fast heat up times that improve efficiency and have been designed for low maintenance and easily, inexpensive replacement parts.

Open coil heating elements from Wattco are typically made for duct process heating, forced air & ovens and for pipe heating applications. Open coil heater elements are made to fit inside standard 2’’ or 3’’ schedule 40 NPS pipe. Open coil heaters are used in tank and pipe heating and/or metal tubing. A minimum clearance of 1/8’’ is required between the ceramic and the inside wall of the tube. Installing an open coil element will provide excellent and uniform heat distribution over a large surface area.

Open coil heater elements are an indirect industrial heating solution to decrease watt density requirements or the heat fluxes on the surface area of the pipe connected to the heated section and prevent heat sensitive materials from coking or breaking down.

Get a quote on an open coil element today. WATTCO also manufactures other industrial heating products such as infrared heaters, control panels, circulation heaters and more. Click here to view all of our products

  • Options
  • Large diameter coils

    NiCr wire (80-20) or (65-35) with larger diameters

  • Small diameter coils

    NiCr wire (80-20) or (65-35) with smaller diameters

TERMINAL HOUSINGS
Open Coil (style 3)
Open Coil angle 2
Open Coil angle 3
Open Coil angle 4
Open Coil element (style 2)
Open Coil Element with bracket
Open Coil Heating - Skewed
Open Coil Heating Rack

High Quality grades of NiCr resistance wire (80-20) & (65-35)

Resistive wire gauges from 6 Gauge wire up to 38 Gauge available

Coil diameters from .250 inch dia up to 0.875 inch dia

Arrow Ceramic/steatite clips (insulators) or rounded ceramic clips available

Termination options include screw type or other alternatives

Custom stretch ratios available

 

Air Duct heating

Furnace heating

Tank heating 

Pipe heating 

Metal tubing

Ovens

Quick heat up time & easily replaceable
Outside diameters: 1 7/8’’ and 2 ¾’’
Lengths: 60-320’’ (5-26 ft)
Single element ratings: 4-20 kW
Pipe Surface: 3-12 W/In2
Voltages: 240, 480 and 600V, 3 PHASE
Used in horizontal 2’’ or 3’’ schedule 40 NPS pipe
Equipped with high density electrical ceramic insulating supports
Can be bent in a vertical plane on at least 12’’ radius
Heavy gauge bus bars
Heavy gauge resistance wire
Special ratings and lengths available upon request

BENEFITS 

  • Easy installation
  • Very long – 40 ft or greater
  • Very flexible
  • Equipped with a continuous support bar that ensures proper rigidity
  • Long service life
  • Uniform heat distribution

 

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