FRANKE-Filter GmbH

The special constitution of our micro fibre cartridges guarantees you a constantly high filtering performance over a long period of time. Yet, why and at which point should the filter cartridges be  replaced? Soot particles and smoke deposit are the reason. They will be sucked in and filtered with the  oil mist and affect little by little the fine fibre of the filter cartridges. Read more about the exact point in  time for a change of the filter cartridges in your oil mist separator manual. Make an appointment when  our experienced service technicians can carry out maintenance work for you. Our aim is to constantly improve our service. The growing network of service partners is at your disposal. Please find a list of  contact persons directly at your side on the reverse.

Vacuum gauge and the regulation of external air

Each Franke Filter oil mist separator is equipped with an appropriate side channel vacuum pump that  produces vacuum in the lube oil system. An exact vacuum, which is necessary to overcome the  resistance of the filter cartridges and keep the vacuum in the entire lube oil system constant, is decisive  for the best possible degree of separation of oil particles from the contaminated air. You can check the  actual state of vacuum by taking a look at the build-in gauges U1 and U2. After the putting into service of the oil mist separator or a change of the filter cartridges, the vacuum, conditioned to the weak saturation and a low resistance of the cartridges, should be adjusted. While the gauge U1 displays the  vacuum in the system, the gauge U2 informs you about the current differential pressure (difference in  pressure inside and outside of the filter cartridge). If the saturation degree of the filter cartridges builds  up, the measured value at U1 declines and increases at the gauge U2 respectively. In order  to reach the  necessary vacuum and an efficient separation degree, the supply of the external air has to be slightly  regulated.

Replacing filter cartridges

The gauge U1 displays the vacuum conditions in the entire system during the normal operation of the  oil mist separator. The measured value at the gauge U2 informs you about the degree of saturation or  rather about how soon the filter cartridge gets dirty. As soon as the vacuum gauge reaches a value of ca.  100 mbar, filter cartridges have to be replaced in order to still ensure trouble free operation and guarantee high separation

Putting into service again

efficiency during the further period of 30.000 hours and more. The replacement of filter cartridges is rather simple. Firstly, the oil mist separator has to be turned off. Afterwards, the filter cover of the filter housing has to be opened to access the filter cartridges. Inserting the new filter elements and delivered O- Sealings, fixing Phillips screws have to be tightened simply with own strength. There is no need in using any tools. Too much pressure would compress the cylindrical body, too little would indicate that the filter tubes cover and the filter cartridge are not airtight. As soon as the oil mist separator is put into service again, the ball valve regulating the external air supply has to be adjusted.