Turning drive for operating valve has cylinder cover connected to housing by at least one stud passing through cylinder and piston, clamping cover against cylinder

摘要

The turning drive (1) has a drive shaft (10) in a housing (2), cylinders (18, 19) with covers (e.g. 20) and pistons (28, 29) in the cylinders. The cylinder covers are connected to the housing by studs (22, 23), which pass through the cylinders and pistons, so that the cylinder covers are clamped against the cylinders by these studs.