The heat transfer oil of the Electric Thermal Oil Heater needs regular replacement. This is because the heat transfer oil will gradually deteriorate during long-term operation at high temperatures, which affects heating efficiency and may also bring potential safety hazards.
When the heat transfer oil is in a high-temperature environment for a long time, it will undergo reactions such as thermal cracking and oxidation, producing impurities and viscous substances. These substances will adhere to the inner walls of heating tubes and pipelines, reducing heat transfer efficiency and leading to increased energy consumption of the Electric Thermal Oil Heater. In addition, they may cause damage to heating components due to local overheating. At the same time, the flash point of the deteriorated heat transfer oil will decrease, posing a fire risk and threatening the safety of equipment and operators.
There is no fixed standard for the replacement cycle, which is mainly determined based on the usage of the heat transfer oil. Generally, it can be confirmed by regularly testing the indicators of the heat transfer oil, such as acid value, viscosity, and flash point. If the indicators exceed the range specified by the equipment, replacement is required. Moreover, the replacement cycle will also vary depending on the brand and model of the heat transfer oil, as well as the operating temperature and usage frequency of the Electric Thermal Oil Heater. It is usually recommended to conduct a test every 1 to 3 years and decide whether to replace it based on the test results.
During replacement, the old oil must be completely drained, and the pipelines and oil tank should be cleaned before adding new oil to ensure that the new oil is not contaminated by impurities from the old oil.
