Valve system with removable fluid interface.

The present invention relates to a system for providing a valve in a line for liquid, where the part of the valve that comes into contact with the liquid in the line can be easily discarded, where said system includes: a housing; a first flexible membrane arranged on the housing, which has an inner side and an outer side; a valve chamber defined by the housing and the first flexible membrane, a path of liquid passing through the housing from a first gate through the valve chamber, to a second gate, so that liquid communication is provided between the valve chamber and the line, whereby the path of the valve chamber enters a first and a second mouth; an accessory for holding the housing, so that the housing can be easily unhooked from the accessory, a first pressure element arranged therein, to alternatively provide pressure to the outer side of the first flexible membrane and release pressure on the side external of the first flexible membrane, to allow a relatively unrestricted flow path of liquid, through the valve chamber; characterized in that at least one of the mouths, inside the valve chamber, protrudes from one side of the housing towards the membrane; and the first pressure element includes an element located in the fitting, to supply a control gas to an area adjacent to the first flexible membrane and to the valve chamber and to change the pressure of the control gas.