Bridge Breaker PC Pumps BB-W Series Units are extension to W Series-Hopper Pumps, Bridge Breaker compels the material into the single screw which feeds the progressive cavity pump to result in a steady flow of product. BB-W Series(Bridge Breaker PC Pumps) convinces with a broad spectrum of applications. It is preferably used for conveying compacted, crumbly, lumpy, solid-loaden, shear-sensitive, sticky to dry, thixotropic, dilatant as well as abrasive or adhesive media.