The Roper 3611CPTHBF-17767-1 Rockworx pump is a patent-pending positive displacement pump with 11 gallons per 100 revolutions displacement and maximum flow rate of 55 GPM. Designed for handling viscous fluids containing solids up to 3/8 inches diameter, this model features wing-style lobes with cast iron construction, tungsten carbide bushings for superior durability, and Wedgee packing for enhanced sealing performance. The pump includes jacketed endplates for temperature control applications, aluminum gaskets for reliable sealing, and an outboard ball bearing for protection against radial and thrust loads, with flanged ports for secure connections. Engineered for lower-shear flow compared to traditional gear pumps, this Rockworx model handles challenging applications including mastic, asphalts, and abrasive fluids while maintaining reliable operation.