innovation for biotech

03/2021 – The anchor screw


The combination of an anchor stirrer with a screw stirrer provides the solution for very coarse suspensions in which media components can accumulate on the bottom of the vessel. Due to the spiral stirrer shape, poorly soluble substances can be better distributed in the reactor volume. The design was implemented in such a way that probes, harvesters and other reactor components are not obstructed. The bbi anchor screw is made of polyamide and is biocompatible according to EN ISO 10 993-1, USP class VI and autoclavable at 121°C.