Slide gate valve, operating method and use

A slide gate valve for chemical and/or petrochemical industrial plants comprising:

• a valve housing having an inlet port with an exit opening and an outlet port with an entry opening, which correspond with one another in an open position of the slide gate valve;
• a blocking device with at least one blocking disc and a pipe bridge that is arranged so as to be movable between the inlet port and the outlet port in order to open and close the slide gate valve;
• and
• at least one guiding device for guiding a flow, wherein the guiding device has at least one guiding element that is arranged on an inner wall of the inlet port and reduces the exit opening of the inlet port in such a way that, as the slide gate valve is opened, an opening cross section of the exit opening is enlarged at a moment of an initial flow ingress into the pipe bridge, wherein the guide element has at least one outer contour at the outlet opening of the inlet nozzle, which extends transversely to the opening and closing direction of the plate slide valve, wherein the outer contour of the guide element is arranged so close to the plane spanned by the outlet opening of the inlet connection that the guide element at least temporarily shields the outlet opening against the passage of the fluid flow when the plate valve is opened, wherein the outer contour of the guide element and the pipe bridge have the same radii of curvature to form a linear opening cross-section, or the outer contour of the guide element is straight to form a circular segment-shaped opening cross-section.