Medical drip infusion equipment comprises first compartment (7) with two volumes, and a valve (11) in the flow channel (16) which opens or closes in accordance with the differential pressure applied to it, and prevents flow of the second solution during infusion of the upper volume, but allows flow of the second solution during infusion of the lower volume contents. Medical drip infusion equipment comprises first compartment (7) with two volumes, where the upper volume (9) lies above the second compartment (8), and the lower volume (10) lies below or at the level of the second compartment. A valve (11) in the flow channel (16) opens or closes in accordance with the differential pressure applied to it, and prevents flow of the second solution during infusion of the upper volume, but allows flow of the second solution during infusion of the lower volume contents.
