Rotork RC200 series pneumatic actuators have been installed for valve control and operation in a new water treatment plant at the Sisak Power Plant, south of Zagreb in Croatia.
The Croatian national power company Hrvatska Elektroprivreda (HEP) has invested €4m in the new plant, which filters and demineralises water from the nearby River Sava before it is used for steam generation and media for the district heating system serving the city of Sisak.
The water treatment capacity is approximately 130m³/hr and the process is accurately controlled by RC200 valve actuators equipped with E4L limit switch boxes. The actuated valve packages were carefully selected for reasons including reliability, environmental considerations and overall cost effectiveness.
Rotork RC200 series actuators feature a modern scotch yoke mechanism that provides a high start and end torque output in a very compact package. Pistons are guided in two places by high-performance bearings which ensure proper alignment and long seal life.
The RC200 design has the lowest weight and the smallest external dimensions of any pneumatic actuator with an equivalent torque output. This contributes to a compact, lightweight and robust actuated valve package. In addition, the design has less stroke volume than comparable rack and pinion actuators, providing a considerable saving in the use of compressed air.