Patent ID: 6948525

Claim:
An electropneumatic regulating valve for an air brake system of a motor vehicle, comprising a valve housing, which contains an axially adjustable control piston which can be actuated by at least one electromagnetic pilot valve for axial adjustment, and which is provided to actuate a valve seat assembly, to switch compressed air flow between at least one of an external brake line connection, a feed pressure connection, and a venting port, said valve seat assembly including a pot-like sealing cup with a coaxial passage, and a circular ring-shaped sealing area which corresponds to a coaxial valve seat arrangement formed by an external valve seat and an internal valve seat, wherein the sealing cup includes an internal reinforcing insert, which is formed essentially in the shape of a U according to the cross section of the edge and which is provided with a molded-on shoulder, which is oriented radially towards the inside and reinforces the inside radial area of the sealing area, whereby the two legs of the reinforcing insert project reinforcingly into respective sealing lip segments of the sealing cup.