How to Extend the Service Life of Electric Heating Tubes through Daily Maintenance - Yangzhou Darui
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How to Extend the Service Life of Electric Heating Tubes through Daily Maintenance
1. The heating part of the electric heating tube should be fully immersed in the heating medium to avoid heat dissipation that is too slow and exceeds the allowable heating temperature, causing damage to the tube. In addition, the wiring lead-out part should be exposed outside the insulation layer of the heater or the heater itself, so that this part does not overheat and become damaged.
2. The input power supply voltage should not exceed 10% of the rated voltage marked on the electric heating tube. If applied below the rated voltage, the heat generated by the tube will also decrease accordingly.
3. When connecting the terminals of the electric heating tube, use two nuts to tighten them relatively. Do not use excessive force to avoid loosening the lead-out screws and damaging the tube.
4. The terminals of the electric heating tube should be kept clean and dry; otherwise, the insulation performance will be reduced, leading to short circuit and breakdown. If used in environments with chemically corrosive, flammable, or explosive liquids or gases, the wiring part of the tube should be protected with an insulating sealing device to prevent accidents.
5. When heating certain adhesives or substances such as sodium nitrate, stearic acid, paraffin, etc., initially reduce the power supply voltage to lower the heating capacity of the tube. Once fully melted into liquid, then raise to the rated voltage for heating.
6. When selecting an electric heating tube, special attention should be paid to the heating medium. It should not be corrosive to the tube shell material.
7. If the electric heating tube has been used for a long time and a thick layer of scale or oil has accumulated on the surface, it should be removed regularly. Otherwise, the heat transfer performance of the tube will decrease, causing the surface heat load to exceed the allowable rating and damage the tube.
8. Electric heating tubes should be stored in a dry warehouse. If the surface becomes damp due to prolonged storage, measure the insulation resistance with a megohmmeter before use. If it is less than 1 megohm/500 volts, the tube should be dried in a drying oven at 200 degrees Celsius.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
