Vacuum filter, also known as vacuum filter, is mainly used for cooling lubricant processing. The so-called cooling lubricant is used in the machining process of metal working. These are used to dissipate heat generated during machining and reduce friction between the tool and the workpiece. In addition, the chips and metal particles produced during the process are also removed. However, only thorough cleaning of this type of working fluid can ensure the best cooling and lubrication properties during the working process. Careful cleaning can significantly extend the service life of the cooling lubricant. This helps to obtain better surface quality during processing.