1. For example, if you follow the procedure of heating the box first and then vacuuming it, the heated air will be pumped out by the vacuum pump, and the heat will inevitably pass through the vacuum pump,

2. The heated gas is directed to the vacuum pressure gauge, which will generate a temperature rise. If the temperature rise exceeds the specified operating temperature range of the vacuum pressure gauge, it may

3. The correct way to use it is to first vacuum and then heat it up. After reaching the rated temperature, if it is found that the vacuum degree has decreased, it should be added appropriately. Doing so is beneficial for

4. The material is placed in a vacuum box to evacuate the gas components that can be extracted from the workpiece material. If the workpiece is heated first, the gas will expand when it encounters heat. Due to vacuum