Filtration system for industrial coolants

A filtration system for removing metal shavings, tramp oil, sludge and dirt from a liquid, said filtration system comprising:

• (a) a tank separated into a clean side compartment and a dirty side compartment;
• (b) a magnetic separator for removing ferrous material from the liquid;
• (c) a filtering system including
• i) a first filter for removing particles up to 0.5 microns from the liquid;
• ii) a second filter for removing particles up to 0.5 microns from liquid;
• (d) pumping means for transferring a stream of said liquid from a machine tool to said magnetic separator and said compartments;
• (e) a sensor for detecting when said first filter is approaching an end of its service cycle;
• (f) circuit means to switch the stream of said liquid from said first filter to said second filter responsive to said sensor;
• and
• (g) an indicator for warning that said first filter has reached the end of its service cycle so that it can undergo maintenance;
• wherein elements (a) through (g) are arranged together to be positioned on a pallet and wherein said filtration system is configured such that liquid from said machine tool is pumped through said magnetic separator and into said dirty side compartment and then through said filtering system or a bypass thereof and into said clean side compartment for return to said machine tool.