ZERO RPH dust collectors feature a built-in hopper to minimize dust-handling activity. With RPH models, at each pulse, dust falls first into the hopper and then into a sealed disposal drum or bag beneath it. With disposable bags, the operator never handles the dust—an important safety feature, especially when blasting hazardous or unknown materials. RPH collectors are commonly used in multishift and high-volume operations, for manufacturing, automotive parts rebuilding, and coating removal. Seven standard RPH models are available ranging from 600- to 3600-cfm: the higher the rating, the greater the number of cartridges. HEPA filtration is available as an option.