The invention relates to an installation for producing a medical preparation, in particular for producing a preparation for parenteral nutrition. The installation comprises a pump with which liquids can be transferred from a plurality of source containers into a target container. The installation has a modular construction and comprises a weighing module and a main module with the pump. According to a further aspect of the invention, the pump is arranged at an inclination with respect to a vertical plane. According to a further aspect of the invention, the installation comprises cascaded valve nodes.