The growing world population has driven scientists to come up with innovative methods of producing potable water from seawater to complement the available small fraction of freshwater. This potable water production is done using a process called desalination. Today, there are several plants with a very big capital outlay in countries such as Saudi Arabia, Israel and many others that produce potable water from a feed of seawater.
Such plants require state of the art operation to ensure consistent potable water quality and process safety. Often, the operation of such plants is done from a centralized control room in which various commands are initiated to control a series of equipment. These include actuated valves that direct the flow of water and other fluids in different directions during the varying cycles of operation. The valves may be operated by pneumatic actuators or electric actuators. In this article, we discuss the various aspects of the application of actuators in the desalination of water.