The wiring part of the electric heating tube should be placed outside the insulation layer

The wiring part of the electric heating tube should be placed outside the insulation layer

1. The component is allowed to operate under the following conditions:

A. The relative humidity of the air shall not exceed 95%, and there shall be no explosive or corrosive gases. (Except for explosion-proof heaters)

B. The working voltage should not exceed 1.1 times the rated value, and the casing should be effectively grounded.

C. Insulation resistance ≥ 1M Ω Dielectric strength: 2KV/1min

2. The electric heating tube should be properly positioned and fixed, and the effective heating area must be fully immersed in liquid or metal solids, and empty burning is strictly prohibited. When scale or carbon deposits are found on the surface of the tube, they should be promptly removed and reused to avoid affecting heat dissipation and shortening its service life.

3. When heating fusible metals or solid nitrate, alkali, asphalt, paraffin, etc., the operating voltage should be lowered first, and only after the medium melts can it rise to the rated voltage.

4. When heating the air, the components should be arranged in a cross and uniform manner to provide good heat dissipation conditions for the components and allow the flowing air to be fully heated.

5. When heating nitrate, safety measures should be taken to prevent explosion accidents.

6. The wiring part 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 section for a long time, and excessive force should be avoided when tightening the wiring screws.

7. The components should be stored in a dry place. If the insulation resistance is lower than 1M Ω due to long-term storage, they can be dried in an oven at around 200 ℃ or heated by reducing the voltage until the insulation resistance is restored.

8. The magnesium oxide powder at the outlet of the electric heating tube should be protected from pollutants and moisture infiltration in the use site to prevent leakage accidents.

1. Firstly, clean the surface of the metal tube and keep it clean;

2. Secondly, the surface is subjected to degreasing treatment, which allows the metal tube to be completely placed in the degreasing solution. The pH value of the degreasing solution should be around 13, and the time should not be less than half an hour. After degreasing, rinse with clean water.

3. Next, acid washing can be carried out, with a pH value of about 3 and a processing time of no more than 10 minutes. After acid washing, rinse with clean water;

4. Formally start blackening treatment: the concentration of the pool solution is between 2-4 pH, and the treatment time is about 10 minutes. After blackening, it is thoroughly cleaned;

5. Finally, dry and oil;

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