Pressure vessel assembly comprising an outer pressure vessel and at least one insert basket

A pressure vessel assembly comprises an outer pressure vessel (1) and at least one insert basket (3) in the pressure vessel (1) for receiving a material to be treated, which with one in the pressure vessel (1) and basket insertable (3) pressure fluid is acted upon. There is a control means (11, 20) for the deployed basket (3) prevailing internal pressure, especially in the form of the interior (9) of the insert basket (3) with the area (12) via the pressure vessel (1) away connected, switchable pressure equalizing line ( 11).