Converting apparatus for molding plastic preforms into plastic containers

The invention relates to a forging device (1) for molding plastic preforms (10) into plastic containers (10A) having a plurality of blow molding stations (8) and with at least one control means (55; 55A; 55B; 55C) for controlling blowing pressures and / or volume flows to the blowing stations (8), wherein the at least one control means (55; 55A; 55B; 55C) comprises at least one control valve (56) with one in a cylinder part (57) guided control piston part (58) by means of which a Blasluftkanalquerschnitt (59) a blast air channel (60) is closable, wherein the control means (55; 55A; 55B; 55C) has an electromagnetically operating the drive unit (61) to effect a change in position of the control piston part (58) within said cylinder member (57) and thus also the blowing pressures and / or to control flow rates to the blowing stations (8).