Abstract: A valve device includes: a hollow member having a through-hole with an axis, an internal surface delimiting the through-hole, a peripheral surface delimiting the hollow member's transverse extent with respect to the axis, and at least one deformation zone deformable to reduce the transverse extent when compression forces act on the peripheral surface, the deformation of the deformation zone moving the hollow member from a rest to a use state, and at least one closure portion extending radially from the hollow member inside the through-hole up to a respective free edge, in contact with the internal surface of the hollow member and/or with at least one free edge of another closure portion occluding the through-hole when in use. The at least one closure portion includes a flexible membrane, foldable when subjected to a fluid and/or solid pressure which moves in the through-hole along the axis, thereby defining a passage.

Abstract: A valve device for a domestic wastewater pipe is provided. The valve device includes a shutter and a fixing element to hold the shutter in the passage of the main duct between the inlet opening and the outlet opening of the pipe. The shutter is movable between a first configuration occluding the passage to prevent the flow of gaseous fluids, and a second configuration allowing the wastewater to flow from the inlet opening to the outlet opening of the pipe. The valve device includes a deformable main body partly defining the shutter, which occludes the passage of the main duct when the shutter is in the first configuration so that a pressure exerted by the wastewater on the shutter causes a reversible elastic deformation of said main body that moves the shutter from the first to the second configuration.

Abstract: A valve device for a domestic wastewater pipe is provided. The valve device includes a shutter and a fixing element to hold the shutter in the passage of the main duct between the inlet opening and the outlet opening of the pipe. The shutter is movable between a first configuration occluding the passage to prevent the flow of gaseous fluids, and a second configuration allowing the wastewater to flow from the inlet opening to the outlet opening of the pipe. The valve device includes a deformable main body partly defining the shutter, which occludes the passage of the main duct when the shutter is in the first configuration so that a pressure exerted by the wastewater on the shutter causes a reversible elastic deformation of said main body that moves the shutter from the first to the second configuration.