Grinding operations can vary enormously in size and nature. A large steel foundry may have a fettling shop with upwards of 60 fettling stations operating concurrently. A large multi-module OptiFlo® RC provides a cost-effective and highly efficient solution. Adequate protection against spark damage is essential. AAF offers flame retardant media for this application. Smaller systems may have a single module OptiFlo RC or FabriPulse L according to conditions. AAF wet collectors are applicable but not commonly used.