Device for dispensing fluid that includes a valve which communicates with a pump

Device for dispensing a fluid comprising a pump and a valve, said valve comprising a channel having an inlet end and an outlet end and defining an axial direction of fluid flow, the valve communicating at its inlet end with the pump and being adapted in connection with a dispensing operation to open under the action of a positive pressure in the fluid and to close by itself when said positive pressure has ceased, the channel being defined by a body portion of rigid material formed with a groove of substantially arcuate cross-section and by a cover portion of flexible material having side edges that extend in the direction of flow, said side edges being sealingly connected to the body portion and gradually conforming towards the outlet end to the shape of the groove, said flexible cover portion being prestressed to sealingly engage a wall of the groove with an engagement pressure in a region at the outlet end of the channel and said pump comprising non-return valve means and a mechanically actuated dome, said dome forming with the cover portion an integral unit and said dome having an edge that is sealingly connected to a housing of the pump, said housing of the pump being provided on the body portion of the valve.