Coupling an actuator to a valve using a retaining element engaging in a recess

A device to mechanically couple an actuator to a valve which is adjustable using a plunger that is displaceable in an axial direction, the device comprising:

• a retaining element configured to be mounted on a connecting chassis of the actuator, the connecting chassis connecting the actuator and the valve and extending in the axial direction to engage a connection piece of a valve body of the valve, the retaining element being configured to be engaged with two opposite sides of the connection piece in a recess incorporated in the connection piece;
• and
• a clamping device that is disposed on a section of the retaining element and configured such that, when the clamping device is actuated, the section of the retaining element on which the clamping device is disposed is displaced parallel to the axial direction relative to the connecting chassis such that the connecting chassis of the actuator bears against the connection piece of the valve body, and
• wherein the retaining element engages an area of the recess via a snap-in element, the snap-in element locking the retaining element into place at a predetermined radial position when the retaining element is moved in a radial direction onto the connection piece relative to the axial direction of the connection chassis.