plug valve
Quick Summary
A plug valve, also known as a cock, is a type of valve used to control fluid flow. It operates by turning a conical plug within a matching seat. This plug has a hole drilled through it, perpendicular to its axis. When the hole is aligned with the pipe, the valve is open and allows fluid to pass. When the plug is turned so the hole is at a right angle to the pipe, it blocks the passage, closing the valve. Plug valves are one of seven main types of valves, which are all devices designed to regulate the flow of liquids, gases, or slurries in pipes.12
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