Pneumatics: Multi-Element Pneumatic Control Systems

By the end of this course, you will be able to: Identify the main elements and control functions of single element control systems.Explain how two individual control systems can be combined to control steam pressure in a heat exchanger. Define independent variable and dependent variable in terms of ratio control Describe how a ratio control system maintains the ration of chemical solution to waste water in a water clarification process Describe how cascade control can be used to regulate the flow of fuel and air into a boiler furnace Describe how auctioneering control can be used to ensure that fuel flow an air flow will be manipulated in the proper order in response to a change in the demand for steam from the boiler. Explain why steam flow and feedwater flow must be balanced with drum level Describe how a three element feedwater control system maintains drum level