Abstract <p>In many industries, during technological operations, gas streams are formed that contain solid particles. These particles must be removed in order to prepare a heterogeneous environment for subsequent production stages or to extract valuable substances from the dispersed phase, as well as before releasing the gas phase into the atmosphere. The operating principle of modern dust collectors is based on the settling of particles in a field of centrifugal force. Centrifugal methods for separating particles from a gas flow are much more effective than gravitational settling, since the resulting centrifugal force is many times greater than the force of gravity. The processes occurring in such devices are very complex and depend on many factors; therefore, during theoretical calculations, many assumptions and simplifications have to be made. Consequently, there is no absolutely accurate theory for calculating centrifugal dust collectors. In this work, an attempt is made to calculate the minimum size of captured particles in the centrifugal stage of cleaning a dust collector developed at Yaroslavl State Technical University. The calculation is carried out using classical criterion equations that describe the deposition of particles in a field of centrifugal force. Comparison of the experimental and calculated data show that this calculation technique can be used for a preliminary assessment of the minimum particle size captured in the centrifugal stage of an inertial centrifugal dust collector.</p>