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What is Flashing in Control Valves?

Flashing occurs when a liquid flows through a control valve and evaporates to retain the vapor. Flashing has some characteristics in common with Cho flow and Cavitation, I. E. The process begins with the vaporization of liquid near the Vena Cava. In order to treat the control valve application as a flash application, the downstream pressure must be less than the steam pressure (p 2 < PV) .
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    Flashing occurs when a liquid flows through a control valve and evaporates to retain the vapor. Flashing has some characteristics in common with Cho flow and Cavitation, I. E. The process begins with the vaporization of liquid near the Vena Cava. In order to treat the control valve application as a flash application, the downstream pressure must be less than the steam pressure (p 2 < PV) . Flash evaporation is a problem because it limits the flow through the control valve and the liquid-vapor mixture is highly aggressive. Metal corrosion caused by flash looks smooth and shiny. Since valves can not prevent Flash, it is best to select valves with the appropriate geometry and materials to avoid or minimize damage.

    Control Valve Flashing Plug
    Control Valve Flashing Plug
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    Will Don

    Will Don

    After earning my bachelor's degree in mechanical engineering from Zhejiang Normal University in 2008, l was fortunate enough to begin my career with Siemens, Fisher, and YTC, focusing on control valve accessories. Over the past dozen years, l've poured my heart and energy into understanding technology and fluid solutions for control valves.
    Now, as the marketing director for THINKTANK, a trusted branch of the Taiwan STONE valve group, I can't help butf eel proud of how far we've come. Our knowledge isn't just reaching professionals like engineer and valve distributors; it's also inspiring the next generation of automation college students.
    l genuinely hope you're enjoying our articles and finding them helpful.Your thoughts, questions, and feedback mean the world to me, so please don't hesitate to reach out to marketing[at]cncontrolvalve.com. Whether you're a seasoned expert or just curious about the field, I'm here to connect, share, and learn together.

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    I am the author of this article, and also the CEO and marketing director of THINKTANK, with 15 years of experience in the industrial valve industry. If you have any questions, you can contact me at any time.

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