A double dump valve, also known as a double block and bleed valve or double isolation valve, is a type of valve arrangement used in piping systems to provide a high level of safety and isolation. It typically consists of two block valves (usually ball valves) with a bleed valve in between them. The purpose of a double dump valve is to ensure that a section of the pipeline can be safely isolated for maintenance or to prevent the flow of fluids, including hazardous materials.
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