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Oleksandr Pozovnyi1 , Andriy Zahorulko1, Jan Krmela2,3, Artem Artyukhov1, Vladimíra Krmelová3 1Faculty of Technical Systems and Energy Efficient Technologies, Sumy State University. RymskogoKorsakova st.,2, 40007, Sumy. Ukraine. E-mail: aleksandrpozovnyi@gmail.com, a.zagorulko@omdm.sumdu.edu.ua, a.artyukhov@pohnp.sumdu.edu.ua 2Faculty of Mechanical Engineering, J. E. Purkyně University in Ustí nad Labem. Pasteurova 3334/7, 400 01 Ustí nad Labem. Czech Republic. E-mail: jan.krmela@ujep.cz 3Faculty of Industrial Technologies in Púchov, Alexander Dubček University of Trenčín. I. Krasku 491/30, 02001 Púchov. Slovak Republic. E-mail: jan.krmela@tnuni.sk, vladimira.krmelova@tnuni.sk

Calculation of the Characteristics of the Multi-gap Seal of the Centrifugal Pump, in Depend-ence on the Chambers' Sizes