Inhalation therapy device comprising a valve

An inhalation therapy device comprising

• a nebulizer chamber,
• an aerosol generator arranged such as to emit a generated aerosol into said nebulizer chamber,
• at least one opening in a wall of said nebulizer chamber, and
• at least one valve arranged on said at least one opening in said wall of said nebulizer chamber,
• wherein said valve comprises:
• a valve seat,
• a resilient valve member and
• a valve member positioning means,
• said valve member positioning means being movable, relative to said valve seat and said valve member, out of a first position and into a second position such that in the first position, said valve member, in a flow-free state, is positioned on said valve seat by said valve member positioning means and, in the second position, said valve member is spaced apart from said valve seat, wherein at least two of the parts valve seat, valve member and valve member positioning means are injection-moulded as a single part.