How to solve the problem when the pipe heater fails

A duct heater is a commonly used heating device. It uses a heating tube within a cylindrical, insulated container to heat gases and liquids. This allows for rapid heating of liquids. These devices offer fast heating speeds, excellent insulation, and high heating temperatures.

A duct heater consists of a main unit and a control system. The heating element is constructed using a stainless steel tube as a protective casing, high-temperature resistance alloy wire, and crystalline magnesium oxide powder, formed through a compression process. The control unit utilizes advanced digital circuitry, integrated circuit triggers, and high-reverse-voltage thyristors to create an adjustable temperature measurement and constant-temperature system, ensuring the proper operation of the heater. Therefore, it's crucial to select the appropriate model and specifications to achieve the desired performance.

It's important to note that improper use of a heater can cause numerous malfunctions and shorten its lifespan.

For example, if a duct heater stops heating after a period of use, it could be due to loose internal wiring, resulting in poor contact. Simply reconnecting the wiring will restore operation. If the heating wire is broken, replace it with a new one. If the heating tube ruptures during use, it should also be replaced promptly.

2. When using cast copper electric heaters, the operating voltage must not exceed 10%. Do not expose them to explosive or corrosive gases. Wiring connections should be placed outside the heating and insulation layers, and the outer casing should be effectively grounded to avoid contact with corrosive or explosive media and moisture. Furthermore, the entire cast copper heater should be placed in a dry environment with a relative humidity not exceeding 95%. If the insulation resistance remains below 1MΩ for a long period of time, bake it in an oven at approximately 200°C for 5-6 hours to restore it to normal. Alternatively, reduce the voltage and apply heat until the insulation resistance recovers.

3. Electric heater leaks are common. First, locate the leak. If the heater element is leaking, bake it out in an oven. However, if the insulation is poor, leakage may occur, requiring replacement of the heater element.