The sealing system allows work to be carried out in non-atmospheric conditions (overpressure and/or vacuum) without using a cooled external mechanical seal. The design of the headpiece and the rotor ensures a high degree of sanitisation which, together with the simplicity of the parts, makes maintenance easier. EMVT mixers have been developed for products which are difficult to mix, since the headpiece design adapts to each application, improving performance and optimising operating time