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SELECTION OF THE HEATING ELEMENT
Selecting the proper sheath material and watt density to give the best results comes from understanding the relationship between solution being heated, sheath material and watt density. The following recommendations are based on information compiled over many years of actual use under normal conditions.
These recommendations can, however, be upset by unusual factors which can effect both the heater life and the media being heated. It is to your advantage to check with the supplier of the chemicals and the supplier of the heater, before using. We cannot guarantee heaters against premature failure due to unusual corrosive action over which we have no control, so please check before heaters are installed.
SUGGESTED WATT-DENSITY RATINGS
| Materials Being Heated | Maximum Operating Temp. °F |
Maximum Per Square Inch |
| Acid, Solution or Electro –Plating Tanks | 180 | 40 |
| Alkali & Oaklite Cleaning Solution | 212 | 40 |
| Asphalt, Tar, Heavy Compounds, etc | 200 300 400 500 |
10 8 7 6 |
| Bunker C Fuel Oil | 160 | 10-16 |
| Caustic Soda 2% 10% 75% |
210 210 180 |
45 25 25 |
| Downtherm A liquid phase vapor phase |
750 750 |
22 10 |
| Downtherm E | 400 | 12 |
| Ehtylene Glycol | 300 | 30-35 |
| Freon | 300 | 3 |
| Fuel Oil Pre-heating | 180 | 9-16 |
| Gasoline, Kerosene | 300 | 3-5 |
| Glue | Heat indirectly using water bath | |
| Lead-Stereotype Pot | 600 | 35 on casting |
| Liquid Ammonia Plating Bath | 50 | 25 |
| Machine Oil, SAE-30 | 250 | 18-20 |
| Metal Melting Pot | 500-900 | 20-27 |
| Mineral Oil | 200 400 |
20-26 16-20 |
| Molasses | 100 | 4-5 |
| Molten Salt Bath | 800-950 | 25-30 |
| Molten Tin | 600 | 20 |
| Oil Draw Bath | 600 400 |
20 24 |
| Paraffin or Wax | 150 | 16-25 |
| Sodium Cyanide | 140 | 40 |
| Steel Tubing Cast into Aluminum | 500-750 | 50 |
| Steel Tubing Cast into Iron | 750-1000 | 55 |
| Socony Vacuum Type Transfer Oil | 600 | 22 |
| Therminols and Heat Transfer Oils | 500 600 |
22 22 |
| Therminol 66 | 650 | 22 |
| Therminol 77 | 700 750 |
22 15 |
| Trichlorenthylene Vapor Degreasing Solutions |
150 275 |
20 |
| Vegetable Oil (fry kettle) | 440 | 30-50 |
| Water (process) | 212 | 50-60 |
| Water (washroom) | 140 | 80-90 |
These watt densities may be adjusted when heat taken-away or flow velocity rates are increased or when operating temperatures are altered.
Because Therm Coil cannot anticipate all conditions under which this information and our products may be used, we cannot be responsible for any electric immersion heater failure that is attributed to corrosion.
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