Valves in power generation industry
Valves are used in the power generation industry for flow regulation, control and isolation in process or at times of intervention or maintenance shutdowns. The increasing demands for power, heat and energy in today’s world simply means that the power generation industry sees a different set of challenges altogether. Applications now have to cope with very changing conditions and ever increasing operating pressures and temperatures – directly impacting stress and corrosion on valves and other process equipments.
Examples of valves used in power generation applications are metal seated valves, butterfly valves, triple offset valves, isolation valves, flow reversal valves, nozzle check valves, etc. These valves have a variety of characteristics that need to be considered prior to materials selection in each application. The valve material will have to be able to resist high pressure at low and high temperature, i.e. in excess of 500°C. Often, this means the need for specialty alloy materials with properties such as toughness, ductility and machinability.