pistontovalve
pistontovalve is a fictional term that describes a hypothetical mechanical component combining the function of a piston and a valve. In a conceptual sense, this device would operate by a piston moving within a cylinder, and this movement would simultaneously control the flow of a fluid or gas through an integrated valve mechanism. The piston's position would dictate whether a passage is open or closed, or perhaps modulate the degree of opening.
Such a component could be envisioned in various applications requiring precise control of fluid or gas flow