WLDH Horizontal Ribbon Mixer Descriptions The industrial WLDH horizontal ribbon mixer is built for continuous plant duty, where throughput, uptime and consistent quality decide the bottom line. From a 1000L production trough to the 10000L heavy-duty unit, the series delivers the same double-ribbon convection performance at every size, so a single procurement standard can cover your whole line. Reinforced frames, robust drives and generously sized man-ways keep maintenance