Positive displacement hollow disk pump with magnetic drive. The magnetic drive coupling transmits the motion to the pump shaft thanks to the use of powerful permanent magnets. Torque transmission occurs without any contact between mechanical parts and the containment canister totally encapsulates the pump liquid from the external environment avoiding any risk of leakage. The pump is self-priming with high dry suction capability, fully reversible and designed for maximum reliability in the most critical applications where the leakage of the seal is not tolerable. Toxic substances, resins, isocyanates and chemicals transfers or process are typical applications. These pumps have been specifically designed with the use of the magnetic drive coupling, and not like a retro-fit of standard pumps as many competitors do.