Check out this amazing video showing how a Caleffi 5465 Series DIRTMAG is separating the magnetite out of a commercial hydronic system! This 12 year-old system recently had the old cast iron boiler replaced with new high-efficiency condensing boilers and ECM pumps on the primary loop. The secondary loop, with VAV re-heat coils, radiators and a large in-floor radiant application, was left pretty much intact. And this is the third time the 5465 was blown down!
If you want to learn more about magnetic dirt removal and that nasty "boiler ink" called magnetite, take a look at our archived May 2015 Magnetic Separation in Commercial Hydronic Systems Coffee with Caleffi webinar.