A valve arrangement of a commercial cooking device having a cooking chamber, said valve arrangement comprising: a housing having a first conduit connecting an interior chamber of the housing with the cooking chamber of the cooking device, the first conduit having a first discharge cross-section (DCS 8); a second conduit connecting the interior chamber of the housing with an outer atmosphere (a), the second conduit having a second discharge cross-section (DCS 9); and at least one valve seat disposed within the interior chamber of the housing, and having at least one valve seat opening cooperating with at least one valve disc, the at least one valve disc moveable between a closed position in which the valve disc is seated on the valve seat opening, and an open position in which the valve disc is disposed away from the valve seat opening; wherein two valve seats (35, 36) are provided in the housing, each valve seat (35, 36) having a valve seat opening (37, 38) comprising a discharge cross-section (DCS 37, DCS 38) larger than the discharge cross-section (DCS 8) of the first conduit, the second conduit, or both conduits (8, 9), wherein one valve seat opening cooperates with a vacuum valve disc that is adapted to be biased by a spring to a closed position seated on the valve seat opening, and wherein one valve seat opening cooperates with a pressure relief valve disc, the pressure relief valve disc moveably mounted in a guide, characterized in that the vacuum valve disc is adapted to be moved by an actuator to an open position disposed away from the valve seat opening, and wherein a rocker lever is pivotally mounted within the housing, the rocker lever in cooperating relation with the vacuum valve disc and the pressure relief valve disc. a housing having a first conduit connecting an interior chamber of the housing with the cooking chamber of the cooking device, the first conduit having a first discharge cross-section (DCS 8); a second conduit connecting the interior chamber of the housing with an outer atmosphere (a), the second conduit having a second discharge cross-section (DCS 9); and at least one valve seat disposed within the interior chamber of the housing, and having at least one valve seat opening cooperating with at least one valve disc, the at least one valve disc moveable between a closed position in which the valve disc is seated on the valve seat opening, and an open position in which the valve disc is disposed away from the valve seat opening; wherein two valve seats (35, 36) are provided in the housing, each valve seat (35, 36) having a valve seat opening (37, 38) comprising a discharge cross-section (DCS 37, DCS 38) larger than the discharge cross-section (DCS 8) of the first conduit, the second conduit, or both conduits (8, 9), wherein one valve seat opening cooperates with a vacuum valve disc that is adapted to be biased by a spring to a closed position seated on the valve seat opening, and wherein one valve seat opening cooperates with a pressure relief valve disc, the pressure relief valve disc moveably mounted in a guide, characterized in that the vacuum valve disc is adapted to be moved by an actuator to an open position disposed away from the valve seat opening, and wherein a rocker lever is pivotally mounted within the housing, the rocker lever in cooperating relation with the vacuum valve disc and the pressure relief valve disc.