Patent ID: 7922151
Filing Date: 2011-04-12
Classification: F16K

Abstract:
1. A valve actuator comprising: a support member comprising a bearing for supporting a rotatable positioning element on the bearing, and a track follower being operatively connected to a valve rod, the track follower being adapted to follow at least part of a track provided by the positioning element upon rotation thereof, the track follower being biased against at least part of the track provided by the positioning element, wherein the track follower comprises a set of ball bearings or wheels rotatably mounted in relation to the valve rod, each ball bearing or wheel being biased against at least part of the track provided by the positioning element and arranged to follow said track upon rotation of the positioning element; wherein the positioning element comprises a substantially circular disc having a solid part and a non-solid part; and wherein the non-solid part of the positioning element comprises two detached and spatially separated disc portions.