Different Types of Control Valve
PI Home Assignment – Blog Topic: Different Types of Control Valve Ø What is control valve? A control valve is a control device used to manage and direct the flow of fluids by varying the size of the flow passage. It gives the direct control of flow, temperature, pressure or liquid level Control valves regulate the flow of a liquid or gas by opening or closing internal passages. The control valves gives the respond to instructions from the controller and then adjust the internal openings accordingly. It varies the rate of flow passing through itself i.e the valve. The valve stem moves, altering the size of the passage and this increases decreases or holds steady the flow. The control valve opening is altered whenever the process parameter being controlled does not equal the value it is meant to be the set point. A control valve consists of three main parts in which each part exist in several types and designs - Valve’s actuator , Valve’s positioner an...