Pumps and pumping apparatus, namely, pumps for the paper and pulp industries; [ rotary pumps, piston pumps, single-phase and multi-phase centrifugal, rotary and piston pumps; ] single-stage and multi-stage centrifugal, [ rotary and piston pumps; axial pumps; ] radial pumps and pumps for pumping liquids, gases, solids and mixtures thereof, and for pumping petroleum, gases, pulp, water and granular substances, and replacement parts for all of the aforementioned