There are three types of industrial vacuum pump filters: Inlet filters are installed at the inlet of a vacuum pump or compressor. Their purpose is to prevent particles, such as dust and debris, from entering the pump and contaminating it. Oil filters are used in oil-lubricated rotary vane vacuum pumps. They are located outside of the pump and are connected to the oil mist separator. By removing contaminants from the oil that lubricates the compression chamber, they ensure that it can be reused, remains clean, and retains excellent lubrication and sealing properties. Exhaust filters, also known as oil mist filters, are installed upstream of the outlet inside the oil mist separator of oil-lubricated vacuum pumps. They filter the oil mist that is produced during operation, catching and separating it from the pumped medium before it is expelled through the exhaust. This allows the oil particles to coalesce and be recycled back into the system.