Heating Vacuums
Heating a vacuum isn't possible. There is nothing to heat. When referring to "heating a vacuum," we mean heating an object located inside a vacuum. Regardless of the heater type, all vacuum heating is accomplished with radiant heating. Some heater types physically lend themselves more readily to an application than others. The application descriptions below will give you a general idea on how a particular heater type is applied for heating an object inside a vacuum.
Heater Type/Application Description
Cable Heaters
Coiled or sinuated, and mounted in a vacuum vessel for radiant heating.
Cartridge Heaters
Mounted in a vacuum vessel for radiant heating.
Cast-in Heaters
Constructed into a vacuum vessel so that the interior surface acts as a radiant heat source. Possible to produce zoned and distributed wattage on the interior surface.
Ceramic Fiber Heaters
Constructed to surround and heat the vacuum vessel so it re-radiates heat to the load.
Flexible Heaters
Applied to the exterior or interior surface of a vacuum pipe or vessel. Well suited for curved and irregular shaped objects. Note: Polyimide is the only flexible heater material recommended for use in the vacuum.
Multicell Heaters
Mounted in a vacuum vessel for radiant heating.
Radiant Heaters
Mounted in a vacuum vessel for radiant heating.
Strip Heaters
Mounted in a vacuum vessel for radiant heating.
Tubular Heaters
Mounted in a vacuum vessel for radiant heating.
