Device for a biological liquid treatment installation

A device for a biological liquid treatment installation, comprising:

• a base having a front face;
• a circuit comprising a plurality of connectors and a network for conveying liquid between said connectors, which circuit comprises a bag comprising two flexible films and said conveying network connectors, which circuit further comprises a press comprising a first shell disposed upright on said front face of said base and a second shell mounted on said first shell, said first shell and second shell cooperating with said bag to form, between said flexible films, by clamping of said bag between said first shell and said second shell, conduits of said conveying network;
• the two said flexible films of said bag being joined to each other and delimiting a zone for treatment of said liquid according to a closed outline, said conveying network connectors emerging on the inside and on the outside of at least one side of said outline;
• and
• said bag further comprising first through apertures on one side of said bag for its positioning, and said first shell comprising studs for hooking said bag to an upper part of said first shell, said hooking studs passing through said first through apertures of said bag.