Valve drive for adjusting a valve via a valve rod comprises a unit with a power storage device with a compressed air cushion which acts on the opposing side of a membrane and is located in the upper shell or lower shell

摘要

Valve drive comprises a unit with a power storage device with a compressed air cushion which acts on the opposing side of a membrane (3) and is located in the upper shell (2) or lower shell (1). Preferred Features: The upper shell and lower shell are flat and are made from thin-walled heads of sheet steel. The power storage device is supplemented in an additional pressure storage device by a compressed air cushion with a maximum operating air pressure (11).