How to properly choose an heating element for adequate application?
Proper application for a heating elements is essential for maximizing the lifespan and get the most efficiency of the heater. Below are key factors for properly choosing a heating element:
● Density, viscosity, special heat and corrosion of the medium to be heated;
● Contamination of the heater for medium to be heated;
● Required resistance ability for corrosion and oxidation of the sheath;
● Required watt density;
● Required maximum temperature.
Details please see below chart:
| Applications | Medium/Air Temperature | PH Vaue/Density | Sheath Material | Watt Density (W/cm²) | Highest Recomended Sheath Temperature |
| Liquids, Mild acid and alkali solutions | Water | PH6-PH8 | Copper | 7.0 | 180℃ |
| Process water | PH5-PH9/2%-3% | Passive stainless steel | 7.0 | 650℃ | |
| Mild acid and alkali solutions | 5%-6% | Incoloy | 7.0 | 870℃ | |
| Demineralized water | Incoloy and stainless steel flange | 7.0 | 870℃ | ||
| Corrosive solutions, Higher density solutions | Mildly corrosive solutions | 5%-15% | Stainless steel | 3.5 | 650℃ |
| Moderately corrosive solutions | 30%-60% | Incoloy and stainless steel flange | 2.3 | 870℃ | |
| Steam boiler water | Steam boiler water | Incoloy/ Copper | 870℃ | ||
| Oil | Light oil | Steel | 3.5 | 400℃ | |
| Medium oil | Steel | 2.3 | 400℃ | ||
| Heavy oil | Steel | 1.0 | 400℃ | ||
| Stagnant oil | Soluble cutting oil | Steel | 2.3 | 400℃ | |
| Air/Steam | Low temperature | Steel | 3.5 | 650℃ | |
| High temperature | Incoloy | 3.5 | 870℃ |
