The precautions for the use and storage of the electric heater:
1. The electric heating tube should be well positioned and fixed. The effective heating area must be completely immersed in liquid or metal solid, and empty burning is strictly prohibited. When it is found that there is scale or carbon on the surface of the tube body, it should be cleaned and reused in time, so as not to affect the heat dissipation and shorten the service life.
2. When heating fusible metals or solid nitrates, alkalis, bitumen, paraffin, etc., the electric heating tube should first reduce the operating voltage, and then increase the rated voltage after the medium is melted.
3. The magnesium oxide powder at the outlet end of the electric heating tube can avoid the infiltration of pollutants and moisture in the use site, and prevent the occurrence of leakage accidents.
4. When heating the air, the elements should be evenly arranged in a cross, so that the elements have good heat dissipation conditions, so that the air flowing through can be fully heated.
5. Safety measures should be considered when heating nitrate to prevent explosion accidents.
6. The wiring part of the electric heating tube should be placed outside the insulation layer to avoid contact with corrosive, explosive media and moisture; the lead wire should be able to withstand the temperature and heating load of the wiring part for a long time, and excessive force should be avoided when tightening the wiring screws. .
7. The electric heating tube should be stored in a dry place. If the insulation resistance is lower than 1MΩ due to long-term storage, it can be dried in an oven at about 200 °C, or the voltage can be reduced and the electric heating is performed until the insulation resistance is restored.
