Today tubular heating elements are used to heat a vast assortment of appliances. In the catering trade and in industry they can also be found in water heaters, dishwashers, warming surfaces, grills and ovens. The tubular heating element is highly versatile since it can be produced in almost any shape and size. They can thus be precisely matched to any application, and are often the most economical solution even for modern appliances.
Structure of the heating element
Inside the metal tube, a heater coil is embedded and electrically isolated in highly compressed magnesium oxide. The optimised structure and very high density of the magnesium oxide form the basis for the excellent mechanical and thermal characteristics of the E.G.O tubular heating elements. They can also be fitted with thermostats and temperature limiters in most applications.
Tubular heating element dimensioning
The determining factors when dimensioning tubular heating elements are the specific loads and the temperature limits of the heated material, the tube shell and the heating conductor.
Typical 3.0Kwatt Fryer Element
If the heating element is accurately dimensioned, it will operate reliably and over a long period. This also requires the element to be installed correctly and have an adequate outflow of heat. The temperature limits of the medium and, if liquids are heated, suitable protection against boiling dry should also be considered.
DIN 44875 also includes recommended specific surface loads.
Note: For advise on your application and element design, please contact our office were we will be pleased to assist you.
Typical 2.5Kwatt Fan Assisted Element
Typical formed heating element for Washing Machine
Custom - made features:
To enable us to work out a proposal and a detailed quotation for your heating element requirements, we need various data.
If possible, you should also provide dimensioned sketches or drawings on a 1:1 scale, also we prefer pdf, dxf or dwg data bases. Your specifications should contain the following details, in particular:
1.Application and medium
♦ Liquid (water, oil)
♦ Special medium (alkaline solution)
♦ Static or in motion (m/s)
♦ Type of mounting, direct or indirect
2. Dimensions of tubular heating element and space available for mounting, length of unheated tube ends.
3. Wattage, voltage, alternating or three - phase current
4. Type of connection
♦ Flex, insulated (e.g. PVC, silicone, glass fibre)
♦ Flex, bead insulated
♦ Flex with insulating tube (temperature - resistant)
♦ Plug - type connection, single (straight or elbow)
♦ Plug - type connection, double (straight or elbow)
♦ Pin connection with terminals
5. Temperatures at connection area
6. Type of fastening (e.g. flange, threaded nipple)