The Knivola metal rotor pump is a positive displacement, volumetric pump. The metal rotor rotates in the circular passage within the pump cavity, altering the working volume through relative motion between the rotor and the pump body, thereby increasing the energy of the conveyed medium. On the contact side of the pump body with the conveyed medium, energy is directly applied to the medium in the form of static pressure. The rotation of the rotor, along with its squeezing action, removes the medium, leaving space on the opposite side to form a low-pressure zone, enabling continuous intake of the medium. The gap between the rotors and the pump body is between 5 to 30 threads (depending on the viscosity and characteristics of the conveyed material), with the surface tension of the liquid compensating for the gap leakage. The mechanical seal uses wear-resistant materials and structures, offering dry-run resistance.