Basics of valve interlocks

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Valve interlocks enforce and guarantee a pre-defined sequence of operation and so eliminate human error. They are used as an industry standard by renowned companies to create a safer working environment. Valve interlocks are used many applications where safe and 'first time right' valve operation is required, such as pressure relief valves (PSV), pig launching and receiving, inert gas systems, pump start up, flare lines, boiler blow-down, ‘2 out of 3‘ and decoking.