Users of oil-sealed vacuum pumps are undoubtedly familiar with the challenge of oil mist emission. Effectively purifying exhaust gases and separating oil mist has become a significant issue that users must address. Therefore, selecting an appropriate vacuum pump oil mist filter is essential. When choosing an oil mist filter, it is crucial not only to select the right type but also to prioritize quality. Poor-quality oil mist filters often fail to adequately separate oil molecules, resulting in visible oil mist at the exhaust port.
However, does using a high-quality oil mist filter guarantee the absence of oil mist at the exhaust port? We at LVGE once encountered a situation where a customer reported oil mist reappearing after installing our oil mist filter. Initially, we suspected that the customer's oil mist filter element had become clogged from prolonged use, causing exhaust flow issues and leading to oil mist emission. However, the customer confirmed that the filter element was still within its service life and not clogged. Our engineers then carefully examined the site photos provided by the customer and finally identified the cause of the oil mist reappearance.
The investigation revealed that the customer had modified LVGE's vacuum pump oil mist filter by connecting a return pipe from the filter's oil recovery port to the filter's intake port. The customer intended this modification to facilitate oil recovery. However, during vacuum pump operation, the exhaust gas traveled through the return pipe to the oil recovery area and then directly to the exhaust port without passing through the filter element. This bypass of the filtration process was the reason why oil mist reappeared at the exhaust port.
What was initially intended to simplify oil recovery inadvertently led to the recurrence of oil mist emission. This case clearly demonstrates that even with high-quality filter, improper installation or modification can compromise its effectiveness. The filter's design incorporates precisely engineered flow paths and separation mechanisms that ensure optimal performance when installed correctly.
Based on this experience, LVGE strongly recommends that any installation or modification of vacuum pump filters should be conducted under the guidance of professionals. Qualified technicians possess the necessary understanding of filtration system dynamics, including pressure relationships, flow characteristics, and separation principles. Proper installation ensures that the filtration system functions as designed, providing effective oil mist control while maintaining optimal vacuum pump performance.
Post time: Oct-17-2025
