RPH collectors range from 600 to 3600 cfm of air. The collectors are designed for multishift, high-volume operations. The included Magnehelic® differential pressure gauge indicates to the operator when filters need service. A control panel with built-in timer automatically pulses the collector. Models vary in size containing between 2 and 8 filter cartridges, and either one or two 30-gallon dust collection drums. Dust drums can be lined, minimizing contact when disposing of dust, an important safety feature when blasting hazardous or unknown materials. They are designed to allow optional bag-in, bag-out cartridge change.