HUBER Pumping Stations Screen ROTAMAT® RoK4 Automatically cleaned fine screen with vertical lifting, dewatering and compaction of screenings

The HUBER Pumping Stations Screen ROTAMAT® RoK4 is the ideal solution for preventing pump failure and clogging, whether for new installations or refurbishments. Unlike conventional screening systems that require manual cleaning, the RoK4 features an automatic self-cleaning screen surface. The system lifts, dewaters, and compacts the screenings simultaneously. The compacted screenings are then discharged into a container or endless bagger for disposal, effectively eliminating odors.

The screen consists of a vertical perforated screen basket and a shafted auger within a vertical tube. Wastewater flows through an inflow connection and chamber into the screen basket. Inside the basket, the auger's flights are equipped with wear-resistant brushes to ensure thorough cleaning of the screen. As the screenings are elevated by the auger, they are progressively dewatered. The compacted screenings are then discharged into a container or bagger, minimizing odor.  The pressate drains through a hose back into the inlet chamber. Meanwhile, the screened wastewater flows off by gravity or is pumped to a higher level.  

The top of the inflow chamber is open, serving as an emergency bypass to allow the system to function even if submerged, such as in the event of a power failure. Additionally, an integrated bottom step prevents back-flooding into the sewer system.