Recently the dynamic pressure filter has been developed and its commercialization started. In this study its performance has been tested experimentally. Experiments with 1.0wt% slurry of 4㎛-silica particles by apply-ing the potential energy for the driving force show that the filtrate flux of water through the membrane of 1.2㎛ pore size is proportional to the rotating speed of inner cylinder. In laminar flow with Taylor vortices the reciprocal of the filtrate flux is found proportional to the cumulative throughput in agreement with a conventional theory. But in tur-bulent flow with Taylor vortices after the transient period the filtrate flux shows to reach a nearly constant value and is found proportional to the Taylor number. On the basis of these results of experiments the dimensionless relations to predict the filtrate flux are suggested in this study.