Definition - What does Plug Valve mean?
A Plug Valve is an industrial purpose valve which is used to control the flow of fluid in pipelines or into any processing units. These valves consist of plugs which are either conical or cylindrical tapered and can be rotated inside the valve body either with the help of a hand wheel or motor actuated. The valves are designed & manufactured as per API 6D specifications for Pipeline Valves and API STD 599 specifications.
Petropedia explains Plug Valve
Plug Valves are fitted on pipelines to control the flow of the fluids. These valves contain plugs which have one or more hollow passageways through which fluids can pass through. Plug valves can be of following types:
- Two ports plug valve with two positions – This is the most common and simplest form of plug valve used to start and stop the flow of liquid in pipelines. The two positions it offers are “open and shut” positions. Such type of valves are conically tapered and mostly used in the natural gas pipelines installed for residential purposes.
- Three way plug valve – This is a specialized valve which is bigger in size. It has three ports. From one port, the fluid enters into the valve and from other two ports it allows the pipeline engineer to choose either 2nd or 3rd port to be the output port from which the fluid exits. In this type of plug valve, engineers get an option of shifting hydrocarbon flows from ports 1 & 2 or 2 & 3 or 1 & 3.