There are two main types of pulg valves; a two way plug and a three way plug, both of which are meant to allow the flow of liquid and gases. Though, the most commonly used is the 3-way plug as it is more advantageous.
The main purpose of the 3-way valve is to divert, isolate and regulate the flow of fluid inside the valves. Moreover, it also shifts the flow between the different valves.
The main advantage of the plug valves, is that they make flowing of fluid convenient and controlled. Normally he plugs valves are lubricated which are used to carry fluids which contain aa small number of grainy materials. On the other hand are the non-lubricated plugs which are genrally used in places which requires zero maintainance. Apart from this, the threaded plug valves are used for flow control and prevention of contamination.
Plug valves generally have cylindrical and conical tapered installed. These tapered plugs rotate within the valve which controls the flow inside the valve. It also has of hollow passageways which permits the water to flow when the valve is open.