plug valve in oil and gas

plug valve

A plug valve is a type of quarter-turn valve that uses a cylindrical or tapered plug with a hollow passageway to control fluid flow. When the plug's passageway is aligned with the pipe, the valve is open; when rotated 90degree, the solid part of the plug blocks the flow, closing the valve. They are simple, quick-acting, and often used for on-off applications in systems requiring a tight shut-off, such as oil and gas lines or chemical services.

How it works Open position: The plug is rotated so the hollow passage inside it aligns with the inlet and outlet pipes, allowing fluid to flow through.Closed position: The plug is rotated 90degree, so the solid part of the plug is positioned across the flow path, blocking the fluid. Key characteristics Quarter-turn operation: Can be fully opened or closed with a single 90degree，turn of the handle or actuator.Simple design: Features a valve body, stem, and a cylindrical or conical plug with a hole through it.Versatility: Available in designs for both on-off service and multiport applications, like diverting flow.Quick operation: The quarter-turn mechanism allows for fast shut-off or opening.Tight shut-off: Provides a secure seal when in the closed position, making it suitable for hazardous or corrosive substances.