RONNINGEN-PETTER CERTA-SEAL™ bag filters feature a positive snap-around sealing system. The system consists of a gasket built into the plastic collar at the top of each bag and a mating flange built into the filter-housing collar ring. The bag is placed over the housing collar ring and then locked into position with light hand pressure. Each filter’s mating flange includes built-in handles and an alignment tab for quicker and easier replacement. The filter housings are available in single-, dual-, multiplex- and multiple-bag configurations to meet a wide range of processing requirements.