Rotork’s CVA electric control valve actuator have been chosen for a challenging application in the harsh environment of a UK coal-fired power station. The CVA actuator has replaced a pneumatic actuator and I/P convertor on one of the fuel oil purge lines for the burners at the RWE Tilbury power station. The power station is coal fired, but oil is used to light and start the burners on the station’s three boilers. Installed over eighteen months ago, the CVA has required no maintenance. It is estimated that there are over 500 pneumatically operated control valves in a typical fossil-fuelled power station, so the use of the CVA as an all-electric alternative presents the potential for savings in maintenance and repair times. CVA, being a high efficiency electric actuator, uses little energy when it moves, and the losses associated with a pneumatic supply are eliminated.
