HOMA submersible mixers have various applications in homogenization, suspension of solids, flow generation, freezing prevention and other mixing or flushing duties. Fibrous solids in the medium are particularly challenging because they lead to entwinement in the propeller area that can seriously impair the performance of the mixer. To adress this challenge, HOMA research and development designed a new propeller for the HRS/CHRS series. The optimum-efficiency propeller design reliably prevents entwinement by eliminating flow dead zones near the propeller blades.