Tubular Heating Elements
Regarded as the most versatile of all electric heating elements, tubular heating elements offer a wide range of ratings, sheath materials and forms that can be applied to almost any temperature requirement, whether for heating of solids, liquids, or gases. The structure of the tubular heating elements allows forming in various shapes, offering the advantages of improved heat distribution, greater compactness, and simple installation in many industrial applications.
Tubular heating elements are constructed from a metal tubular sheath of material selected to suit a given application. This sheath, surrounds a helical coil of nickel-chrome resistance wire, centered and tightly compacted by an electrical insulator and heat transfer medium of magnesium oxide (MgO). This gives a resistance spiral that can be varied in heat concentration and cold length sections, protected from atmospheric corrosion and mechanical abuse. Mounting bushes, header bosses, flanges etc. can be fitted to suit all installation situations.
Common Tubular Heating Element Applications
Water Heating (Liquid Immersion)
Hot water and steam are required for numerous industrial and commercial applications. For a good percentage of these, an immersed tubular heating element is the most efficient, inexpensive and robust solution.
- Corrosive solutions for plating baths and acid tanks
- Fresh and salt water for aquaculture and sterilizing equipment
- Waxes and other substances which require a higher temperature to become workable.
- Oils and like liquids which need to be heated gently.
In this type of process the system of heating relies on the tubular heating elements to heat the air surrounding them. The watts density is dependant on the temperature and the velocity (if any) of the air or gases passing over the element. Elements can be teamed up in banks for higher energy output.
- High temperature sealed ovens
- Low temperature drying / warming Ovens
- Hot zone sealed chambers on conveyor systems
- Incubators and other warming cabinets
Radiant Heating (Infrared)
Radiant or Infra-red heat is utilized best in open applications where sealing the area is not possible or practical. In this case, the tubular heating elements effectively heat solid masses which fall in the path of the radiant heat. For this reason it is more efficient to utilize radiant heat to heat a mass or object in an open environment.
- Curing ovens
- Open Conveyor systems
- Powder Coating / Paint drying processes
These elements are essentially designed to transfer energy (heat) onto or into a solid mass of metal. Tubular heating elements can be either clamped on - or better still, cemented into a machined groove. EHE are leaders in this field and should you require advice, please don't hesitate to contact us.
- Clamped onto solid mass for heat transfer
- Cemented into machined grooves for direct mass heating - Hot runner Manifolds