Filtration systems with bag or cartridge filters are often used when processing high-value materials, such as in the watchmaking or jewellery industry. With the appropriate cartridges, retained precious metals can be easily recovered. Depending on the amount of contamination and the required filtration level, multiple fine filter housings can be connected in series or in parallel to the coolant system. The filter bags and cartridges can either be washed or incinerated. The design permits the systems to be fully encased if required.