Control Valves
A valve is a control device that is utilized in adjusting the flow rate of a fluid in a pipe (Doddannavar, Barnard, and Ganesh, 2005). This implies that the flow rate will change as the valve opens and closes either partially or fully, thus providing some obstruction to some extent (Rennels and Hudson, 2012). The valve comprises a flow passage in which the flow area can be varied. Operation of valves in most scenarios is manual. In cases where the valves are operated automatically, electromechanical actuators are used. The electromechanical actuators can include electric motors or pneumatic actuators that are motorized by air ...