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  2. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    Tilting-disc inconel check valve Check valve symbol on piping and instrumentation diagrams.The arrow shows the flow direction. Vertical lift check valve. A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

  3. Chemigation valve - Wikipedia

    en.wikipedia.org/wiki/Chemigation_valve

    Sometimes called a check valve or a backflow preventer, a chemigation valve is an apparatus designed to protect water supplies from agricultural chemicals used during chemigation, the application of chemicals such as fertilizers and pesticides through irrigation water. [1]

  4. Tesla valve - Wikipedia

    en.wikipedia.org/wiki/Tesla_valve

    A Tesla valve, called a valvular conduit by its inventor, is a fixed-geometry passive check valve. It allows a fluid to flow preferentially in one direction, without moving parts. The device is named after Nikola Tesla, who was awarded U.S. patent 1,329,559 in 1920 for its invention. The patent application describes the invention as follows: [1]

  5. Double check valve - Wikipedia

    en.wikipedia.org/wiki/Double_check_valve

    A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

  6. Ariana Grande Reveals Why She Won't Be Touring in 2025 ... - AOL

    www.aol.com/ariana-grande-reveals-why-she...

    Ariana Grande isn't saying goodbye to touring for good — just for now.. Speaking with Variety in an interview published on Wednesday, Dec. 17, the Wicked star spoke about the possibility of ...

  7. 6 Side Gigs To Avoid in 2025 - AOL

    www.aol.com/finance/6-side-gigs-avoid-2025...

    The side-gig industry is still booming, but not all side gigs are created equal and not all people doing them make enough money to justify the time and effort involved. According to Self, just ...

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