The article recommends the hydrodynamic modes of the wet dust collection and gas cleaning apparatus. The results of an experimental study on the determination of hydraulic resistance in a wet dust collector and gas purifier are presented. In studying the effect of the working bodies on the gas flow, defined and comparative graphs were constructed for different values of hydraulic resistance and variable factors. Empirical formulas were obtained to adequately describe the process using the least squares method for experimental results and graphical dependencies.