Pipeline Valve

a device in pipelines for controlling the flow of a liquid, vapor, or gas. Large valves have monolithic cast bodies with flanges; small valves are threaded for connection to pipes, pumps, and other machines. In the simplest valves the valve stem is turned manually by a handwheel; a hydraulic or electric motor, which is actuated by a change in pipe pressure, is used for automatic control. Valves are widely used in industrial pipelines and sanitary-engineering installations.

单词	pipeline valve
释义	Pipeline Valve Pipeline Valve a device in pipelines for controlling the flow of a liquid, vapor, or gas. Large valves have monolithic cast bodies with flanges; small valves are threaded for connection to pipes, pumps, and other machines. In the simplest valves the valve stem is turned manually by a handwheel; a hydraulic or electric motor, which is actuated by a change in pipe pressure, is used for automatic control. Valves are widely used in industrial pipelines and sanitary-engineering installations.
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