Valve device

A valve device (100) comprising:

• a hollow member (1) which comprises:
• a through-hole (2) having an axis X,
• an internal surface (2a) which delimits the through-hole (2),
• a peripheral surface (3) which delimits the transverse extent of the hollow member (3) with respect to the axis X, and
• at least one deformation zone (4, 5, 6) which is capable of being deformed so as to reduce the transverse extent of the hollow member (1) when one or more compression forces act on the peripheral surface (3), the deformation of the at least one deformation zone (4, 5, 6) moving the hollow member (1) from a rest state to a use state,
• at least one closure portion (7, 8, 9) which extends radially from the hollow member (1) inside the through-hole (2) up to a respective free edge (10, 11, 12), which is substantially in contact with the internal surface (2a) of the hollow member (1) and/or with at least one free edge of another closure portion so as to occlude the through-hole (2) when the hollow member (1) is in the use state,
• wherein the at least one closure portion (7, 8, 9) comprises a flexible membrane which is capable of folding when the flexible membrane is subjected to a pressure of a fluid and/or solid which moves in the through-hole (2) along the axis X, thereby defining a passage which allows the fluid and/or solid to pass through the through-hole (2).