Overview

Rotork’s CVA actuators replaced old, underperforming actuators to provide precision control in a glass combustion system.

Challenge

Raw fibreglass material in pellet form is transported from a hopper into a furnace and melted. Globe control valves must accurately control the ratio of natural gas and oxygen supplied to the furnace to melt the raw glass.

Solution

Existing actuators at several Asian fibreglass plants provided poor performance and inaccurate valve control. Precision control was needed to create the correct mixture of natural gas and oxygen to ensure good combustion and provide a lean burn.

Result

CVAs were installed to replace the existing underperforming actuators to deliver the required accurate control.