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A shutdown valve (also referred to as SDV or emergency shutdown valve, ESV, ESD, or ESDV; or safety shutoff valve) is an actuated valve designed to stop the flow of a hazardous fluid upon the detection of a dangerous event. This provides protection against possible harm to people, equipment or the environment.
Pilot valve: regulates flow or pressure to other valves; Petcock, a small shut-off valve; Pinch valve, "beach ball valve": simple, single-part two-port check valve made from soft plastic and molded onto inflatable units such as beach balls, air mattresses, water wings; can be inflated by pump or by mouth
The shut-off valve was invented in Olean, New York, in 1939 by Richard C. Corson. At a loading dock at the Socony-Vacuum Oil Company, Corson observed a worker filling a barrel with gasoline and thought it inefficient. The sound of a toilet flushing later gave him the idea for a "butterfly float."
Plans to restart a pipeline in Santa Barbara County have angered residents worried about an oil spill similar to the massive one near Refugio State Beach in 2015. ... and automatic shutoff valves ...
An automatic lubrication system consists of a reservoir with a pump, feed lines, metering valves, and injectors. The automatic lubrication system is connected to a control system via switchs . The control system may involve human input or may be computerised ( computer numerical control or CNC).
A petcock is a small shut-off valve used to control the flow of liquid or gas.Historically, petcocks were threaded valves controlled by a butterfly handle; [citation needed] modern petcocks are typically ball valves.
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