Roto-Disc® Company has been manufacturing heavy duty industrial valves for difficult dry and slurry material handling applications since 1984. The spherical valves will slice through almost any sticky, gummy or abrasive substance and won’t leak, gum-up or pinch/break product. They are ideal for the food, pharmaceutical and chemical industries and as replacements for ball, slide-gate / knife-gate, and butterfly valves. Sanitary, bubble-tight and diverter styles are also available. Almost anything that runs through a process line can run through these workhorse valves. http://www.rotodisc.com/