What should we pay attention to when using the electric heating element?
The terminal of the electric heating tube should be relatively fastened with two nuts when wiring. Do not use too much force to avoid the loosening of the lead screw and damage the electric heating tube.
The heating tube 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 electric heating tube should be placed in a 200 degree drying oven for drying.
The heating part of the electric heating tube should be completely immersed in the heating medium to avoid damage to the electric heating tube due to undesirable heat dissipation and exceeding the allowable heating temperature. In addition, the lead-out part of the wiring should be exposed to the insulation layer of the heater or outside the heater, so that this part should not be overheated and damaged.
Input power, the voltage should not exceed 10% of the rated voltage marked on the various electric heating tubes. If it is suitable for lower than the rated voltage, the heat generated by the electric heating tube will also decrease.
The terminal of the electric heating tube should be kept clean and dry. Otherwise, it will reduce the insulation performance and be short-circuited. The insulating and sealing device is strictly protected to prevent accidents.
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 industrial electric heating tube. To the rated voltage for heating.
The electric heating tube 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 electric heating tube and cause the heat load on the surface of the tube to exceed the rated allowable and be damaged.
The special electric heating tube should be carefully read the relevant instructions before installation and use, so as not to damage it.
Special attention should be paid to the heating medium when selecting electric heating tubes. It should have no corrosive effect on the material of the electric heating tube and shell.
