Flanged Immersion Heaters

Typical Applications

• Heating of water
• Heating of chemicals
• Thermic oil heat exchangers
• Heating of gas Anti-frost protection in storage tanks
• Ex-classifiedenvironments
  
  

Flange Heater Design Considerations

• Sheath material (element tube) as well as flange material must be matched to the medium to be heated. Issues with corrosion resistance, chemical stability, temperature stability, etc must be considered.
• The rate of heat transfer between element and the medium is important. If heat transfer is too high, the medium might degrade.
  Too low a heat transfer can result in a bulky construction.
• Degradation of the medium can quite often result in a precipitation of the degraded material onto the element sheath. As this can reduce the rate of heat transfer, the element is put at risk of overheating.
• Flow rate of the medium over the elements helps to improve the heat transfer. In such a case flow velocities and flow characteristics are of importance.
• Physical sizing of the element bundle in relation to the vessel it is mounted into, must be taken into consideration and balanced against all the other design criteria as mentioned above.
• Terminal design needs to consider current/ voltage rating as well as the type of electrical control required. Environmental issues are important criteria, ie. Ex rating, dust and moisture protection.
• If the heater is used in a hazardous area, this will require substantial design considerations on the terminal layout and would require specialised certification (EX, ATEX) by third party authorities.