How to use and maintain cartridge heater
1. The cartridge heater has been used for a long time. If thick tube dirt and grease accumulate on the surface, it should be removed regularly, otherwise it will reduce the heat transfer performance of the cartridge heater and cause the heat load of the tube surface to exceed the rated allowable damage.
2. The heating part of the cartridge heater should be completely immersed in the heating medium to prevent the cartridge heater from being damaged by undesirable heat dissipation and exceeding the allowable heating temperature. In addition, the lead-out part of the wiring should be exposed to the heat insulation layer of the heater or outside the heater, so that this part should not be overheated and damaged.
3. The cartridge heater terminal should be kept clean and dry. Otherwise, it will reduce the insulation performance and be short-circuited. If it is used in a chemically corrosive, flammable, explosive and other liquid or gas environment, the cartridge heater should be connected Strictly protect with insulating and sealing devices to prevent accidents.
4. When heating certain viscose and other substances, such as sodium nitrate, stearic acid, paraffin, etc., the power supply voltage should be lowered at the beginning of heating to reduce the heat generation of the cartridge heater, and when it is completely melted into liquid, it will rise to Rated voltage for heating.
5. Input power, the voltage should not exceed 10% of the rated voltage marked on the various cartridge heaters. If it is suitable for lower than the rated voltage, the heat generated by the cartridge heater will also decrease.
6. The special cartridge heater should be carefully read the relevant instructions before installation and use to avoid damage.
7. For the terminal of the cartridge heater, use 2 nuts to tighten it relative to each other when wiring. Do not use too much force to avoid the loosening of the lead screw and damage the cartridge heater.
8. Special attention should be paid to heating medium when selecting cartridge heater. It has no corrosive effect on the cartridge heater shell material.
9. The cartridge heater should be stored in a dry warehouse. If the surface is damp due to long-term storage, use a megohmmeter to measure the insulation resistance. If it is less than 1 megohm/500 volts, the cartridge heater should be placed in a 200 degree drying oven for drying.