The development of application-specific oil mist coalescing filters with very high separation rates, low pressure loss, and an optimal service life is the central service of UT99.
Oil mist separation using coalescing filters
Gas-borne droplets of oil must be separated in situations where they damage the environment, pose a risk to health, or impair the operation of any system or machine. This is what coalescing filters are for, and they've already proved themselves in many applications, including crankcase and lubricating oil tank ventilation. These separators essentially consist of fine fibers that catch and trap oil droplets. The separated drops expand in size by coalescing (flowing together). As soon as they exceed a critical size, they are transported by the flow of gas in "oil channels" through the filter. On the rear of the filter, the separated oil is drained under the force of gravity to the filter floor, from where it can be returned to the process.
How often do coalescing filters have to be changed?
This question has to be answered on a case-by-case basis. For example, the filter change interval for the UPF-OTV product series is up to 32,000 hours. When configured accordingly, the same applies to the UPF-CCV product series and the UPF-OCV product series.
Did you know?
If configured incorrectly, coalescing filters can themselves become a source of oil droplets as a result of, for example, droplet entrainment or bubbles bursting.
Coalescing filters use both inertia and diffusion as separation mechanisms. They are thus able to effectively separate particles larger than 1000 nm and smaller than 100 nm.
It can take days, or even weeks, before oil mist filters start to drain. Only then they do achieve an operating status that will remain constant for an extended period of time.
A total separation result of 99.9% can reduce oil mist concentration levels to less than 1 mg/m³. Emissions like these are invisible to the human eye.