PLUG VALVE Meaning and
Definition
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A plug valve is a type of valve used in piping systems to control and regulate the flow of fluids through pipes. It consists of a cylindrical or conical plug with a passage or hole that can be opened or closed by rotating the plug within the valve body. The plug has a shape similar to a cone or cylinder, and it is usually made of metal, such as stainless steel.
When the plug is rotated, it can be positioned in three different ways: fully open, fully closed, or partially open, allowing for precise control of the flow rate. The plug is operated by a handle or wheel attached to the stem, which is connected to the plug and allows for easy manual operation.
Plug valves are commonly used in applications where a tight shutoff is required, as they provide a reliable and leak-proof seal. Their simple design and ease of operation make them suitable for a wide range of industries, including oil and gas, water treatment, chemical processing, and industrial manufacturing.
One advantage of plug valves is their ability to handle a variety of fluids, including liquid, gas, and slurry. They can also withstand high temperatures and pressures, making them suitable for demanding applications. However, their flow control capabilities are not as precise as some other types of valves, such as ball valves or butterfly valves.
Overall, plug valves are important components in piping systems, providing an effective means of controlling fluid flow and achieving reliable shutoff in various industrial processes.
Etymology of PLUG VALVE
The word "plug valve" derives its etymology from the combination of two separate words: "plug" and "valve".
1. Plug: The term "plug" originated in the late 15th century from the Middle English word "plogge" and Old English word "plucca", both meaning a stopper or a blockage. This evolved from the Proto-Germanic base word "pluggōną" meaning "to block" or "to seal".
2. Valve: The term "valve" originated in the late 14th century from the Latin word "valva", which referred to a folding door, gate, or barrier. It later expanded to include the mechanical device used to control fluid flow.
