Flexible heaters are devices that can be molded to the shape of the heated object.
Most flexible heaters use a sheath or sleeve as a protective outer covering for the heater elements.
Flexible heaters differ in terms of features and options. Some products are corrosion resistant, explosion-proof, finned, or portable. Others are suitable for cryogenic use or provide dynamic power regulation.
Underwriters Laboratories (UL) and other organizations rate these devices. Indirect fired heaters use a secondary heat exchanger to separate the breathable air stream from the combustion air stream. Features for flexible heaters also include overheat protection, independent timing controls, and internal temperature detectors.
Flexible heaters are silicone rubber heaters with a bonded polyimide power flex-lead. These thin, sturdy and accurate units have the advantages of the etched foil silicone rubber heater, withstand temperature excursions, factory vulcanizing, etc. plus the added flexibility of the polyimide heater in the lead area – making them ideal for demanding applications. The heaters can be designed in the exact shape and size needed allowing the part to conform to a piece of equipment. They are moisture and chemical-resistant providing long heater life.