Patent ID: 7353801

Claim:
A valve regulating device to regulate circulation of a fluid in a region of an opening comprising: a pivoting plate-shaped valve body; a annular-shaped support body providing a seat for at least a portion of a peripheral edge of the valve body; wherein the support body carries or integrates two opposing bearings mounting the valve body in a rotational manner; said valve regulating device further comprising a control pin determining a position in rotation of the valve body and passing through the valve body by dividing it into two opposing shutter-like portions; wherein said valve body is displaced in rotation between a totally open position, in which the valve body opposes a minimum surface generated by a flow of the fluid, and a closed position, in which the valve body rests against the seat or a seat portion provided by the support body and closes a passage through the support body; said valve regulating device being configured to be attached in the region of the opening to be regulated by application of the support body against an edge delimiting the circumference of the opening, said valve regulating device configured to be mounted between an outlet and an inlet providing a passage portion therebetween, said valve regulating device wherein the support body is provided with a seal with, on the one hand, a first functional segment extending over a first portion of an internal periphery of the support body and bearing against a face of a first of the two shutter-like portions of the valve body in the closed position and, on the other hand, a second functional segment extending over a second portion of the internal periphery of the support body, having a different composition from that of the first functional segment and bearing against an opposing face of the second shutter-like portion of the valve body in the closed position, wherein the first and second functional segments of the seal have protruding lateral extensions, in the form of ribs, in a region of a face of the support body bearing against the edge of the opening, said extensions being interconnected by intermediate joining portions extending in a protruding manner over a respective body of the two opposing bearings, so as to provide a continuous peripheral seal around the opening in the region of which the flow is to be regulated when the regulating device is mounted on the opening.