What is closed loop wet blasting system?

A closed loop wet blast system is designed for water circulation, once you add abrasive and water to the cabinet, you recycle the clean water and abrasive slurry until you want to change it out. www.kafan-finishing.com/wet-b...
As the water and abrasive can be recycled, the wet blasting machine only requires a compressed air supply and a power source to operate.