High torques in dynamic flow conditions on wedge gate valves

摘要

The application of the Optimov program to some of our customer plants revealed that some families of wedge gate valves require higher torques in dynamic flow conditions than historically assumed. Valves inspections revealed that these high torques are caused by poor manufacturing processes of these valves. The Disc Factor of these valves was corrected through statistical analysis. The issue was solved through increase of the torque switch settings and replacement of the actuators of these wedge gate valves when needed.