Calculators
Ohm's Law – Single
Ohm's Law – Triple (Delta)
Ohm's Law – Triple (Wye)
Heat Energy Requirements
Wattage Requirements
Glossary
  • Silicone Rubber Heaters

    Durex’s silicone rubber heaters take advantage of the unique properties of silicone rubber to provide heating elements of unparalleled performance. Silicone rubber is calendared onto fiberglass cloth in a variety of thicknesses and constructions which serves as the basis for Durex’s silicone heating elements. Generally two layers of material containing an etched foil element or a precision wire wound element are vulcanized together to form a basic silicone heating element. 

    You may also be interested in Kapton® (polyimide)Flexible Heaters.  

    Contact us for Engineering assistance.

    Product Overview

    Design Features:

    • High di-electric strength and resistance to di-electric fatigue
    • Ozone, weather, and chemical resistant
    • Flame retardant and non-toxic
    • Low outgassing with no sulfur or nitrogen to create hazardous compounds that are prevalent in organic rubbers
    • Proven thermal stability

     

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    Engineering Data

    Silicone Rubber Heater Attachment Methods

    Silicone Rubber Heater Temperature Controls

    Silicone Rubber Heater Lead Wire Options and Harnesses

    Silicone Rubber Heater Thermal Insulation

    Etched Foil Elements

    Wire Wound Elements

    Silicone Rubber Formed Heating Elements

     

    Specifications:

    • Sizes: up to 36" wide (consult factory)
    • Standard Thickness: 0.030", 0.043", 0.056"
    • Maximum Operating Temperature: 450°F (232°C) intermittent
    • Minimum Operating Temperature: -60°F (-50°C)
    • Maximum Watt Density: 60 watts/in²
    • Maximum Voltage: 600 volts
    • Wattage Tolerance: standard +5% -10%

     

    ENGINEERING SPECIFICATIONS:

    Wattage
    Durex can provide silicone rubber heaters with a variety of wattage and power options. Although uniform watt density (watts per square inch) is the most common configuration, Durex engineering can profile the power density to supply the heat where it is needed in the application. A common scenario is when heating a plate, the outer perimeter can be manufactured with a higher watt density to minimize edge loss and yield a more uniform temperature across the surface.

    Silicone rubber heaters can also be provided with independent circuits so that two different power densities can be utilized. For example, a higher powered circuit could be used to bring a part up to temperature, while an energy saving lower powered circuit maintains the part at a desired temperature. This design feature can be beneficial with applications that are battery powered to conserve battery life.

    Voltage
    Durex silicone rubber heaters can be powered with voltages up to 600 volts in both AC and DC applications. For high voltage applications, Durex engineering will select the appropriate materials and design the elements to account for the higher di-electric requirements. Dual voltage heating elements can also be provided by Durex. A common configuration would be a 120/240 volt heating element. This three wire lead arrangement allows the OEM customer to stock only one heating element that can be utilized in both their 120 volt and 240 volt machines. To accomplish this benefit, Durex engineering designs the heating element with two circuits that can be wired in either parallel or series to achieve the same wattage output for both voltages.

    Independent four power lead, dual voltage heaters are also possible under certain situations. For the aerospace and aviation industries, Durex provides 28/120 volt heating elements that contain separate independent circuits to deliver the same wattages for either situation. Consult Durex engineering for assistance with any of these options.

    AGENCY APPROVAL 
    Durex offers flexible heating element component recognition for both UL and Canada under UL file number E110394. Durex is continually increasing its product offerings and options under component recognition. Please call Durex for the latest inclusions. In addition, Durex product support can be a valuable resource in seeking approval for UL listing on OEM equipment as it relates to issues with heating elements as Durex has helped many OEMs with certification issues.

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