KREBS Coal Classifying Improve your throughput with reliable and long-lasting KREBS gMAX Cyclone are designed with enhanced hydrocyclone geometry and materials of construction to provide you with finer, sharper separations Optimum cyclone performance relies on minimising turbulence, while maximising tangential (outer edge) velocity. As a leading cyclone manufacturer, we designed our gMAX cyclone to focus on both of these important factors.  The result is a cyclone that provides significantly advanced performance. In fact, the performance level reached by the gMAX was once only achievable using many small-diameter cyclones, at a much higher capital cost.