Politecnico Di Milano

Stefano Malavasi

A valve system includes a hollow valve body provided with an inlet and an outlet which allow a flow of a fluid in the valve body; the valve body housing an obstructer rotatable, about a rotation axis, between a first position, in which the obstructer stops the passage of fluid between the inlet and the outlet, and a second position, in which the obstructer allows a passage of fluid between the inlet and the outlet. The valve system provides for rotation of the obstructer between the first position and the second position. A rotor is placed inside the valve body and is provided with a rotation shaft. The valve body also includes a housing having a recess with a spherical segment configuration on a lateral portion of the valve body, in which the obstructer is at least partially housed in the second position.

Energy recovery valve system with spherical segment valve for controlling the fluid flow in a duct

A valve system for controlling the fluid flow in a duct, includes: a valve body adapted to be inserted in an interruption of the duct, and provided with an inlet and an outlet for a flow of fluid in the duct, a lateral flow valve, developing substantially transversally in the duct, placed in the valve body upstream of the fluid flow, the valve having an obstructer capable of moving transversally in the duct to 'laterally' interrupt part of the fluid flow in the duct, an actuator adapted to move the obstructer from a first position, in which the duct is fully open, to a second position, in which the duct is fully closed, a rotor shaped substantially as a turbine, placed inside the valve body downstream of the valve with respect to the fluid flow, the rotor being located at a distance from the valve comprised within a pressure recovery zone, the pressure being generated by the valve in the absence of the turbine.

Energy recovery valve system with lateral flow valve for controlling the fluid flow in a duct

A control valve for a fluid flow includes: a valve body that defines an inlet and an outlet for the fluid, an obstructer inserted in the valve body, and an actuator system configured for reversibly translating the obstructer between a first position, in which the obstructer allows the passage of the fluid between the inlet and the outlet, and a second position, in which the obstructer prevents the passage of the fluid between the inlet and the outlet; the control valve further includes a turbine rotor housed inside the valve body, wherein the rotor includes a plurality of blades and is configured for continuously rotating under the action of the fluid flowing between the inlet and the outlet, the rotor rotating about an axis of rotation substantially aligned with the direction of translation of the obstructer.

Energy recovering flow control valves

A fluid flow control valve () includes a housing () and a spherical obstructer () having a through hole (), wherein the spherical obstructer () is inserted in the housing () and is adapted to rotate therein () about an axis of rotation () between a first position, in which the through hole () is substantially coaxial to the control valve to allow the passage of a fluid, and a second position, in which the through hole () is substantially transversal to the control valve to prevent the passage of a fluid. The control valve further includes a rotor () within the through hole (), wherein the rotor is adapted to rotate in a continuous manner under the action of a fluid flowing through the control valve, rotating about a second axis of rotation () substantially coinciding with the axis of rotation of the spherical obstructer.

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Buccinasco, Italy

Stefano Malavasi