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  2. Ball valve - Wikipedia

    en.wikipedia.org/wiki/Ball_valve

    A ball valve is a flow control device which uses a hollow, perforated, and pivoting ball to control fluid flowing through it. It is open when the hole through the middle of the ball is in line with the flow inlet, and closed when it is pivoted 90 degrees by the valve handle, blocking the flow. [1]

  3. Four-way valve - Wikipedia

    en.wikipedia.org/wiki/Four-way_valve

    The four-way valve or four-way cock is a fluid control valve whose body has four ports equally spaced round the valve chamber and the plug has two passages to connect adjacent ports. The plug may be cylindrical or tapered, or a ball.

  4. Hayward Executive Airport - Wikipedia

    en.wikipedia.org/wiki/Hayward_Executive_Airport

    Hayward Executive Airport (IATA: HWD, ICAO: KHWD, FAA LID: HWD) is a municipal airport in Hayward, California. [1] The National Plan of Integrated Airport Systems for 2023–2027 categorized it as a reliever airport. [2] The towered airport near the east shore of San Francisco Bay was formerly the Hayward Air Terminal. [3] [4]

  5. Shuttle valve - Wikipedia

    en.wikipedia.org/wiki/Shuttle_valve

    Positioning a manual valve to neutral exhausts the air pilot pressure, closing the two-way valves, and trapping oil on both sides of the cylinder to lock it in position. [ clarification needed ] Standby and emergency systems: compressor systems requiring standby or purge gases capability are pressure controlled by the shuttle valve.

  6. Where Will Dogecoin Be in 1 Year? - AOL

    www.aol.com/where-dogecoin-1-115000529.html

    Image source: Getty Images. Why investors should avoid Dogecoin. The biggest reason investors should avoid Dogecoin is because it's a meme coin.As I pointed out, the primary reason Dogecoin's ...

  7. Electrohydraulic servo valve - Wikipedia

    en.wikipedia.org/wiki/Electrohydraulic_servo_valve

    This design results in significant increases in servo valve flow capability, stability, and force output. Similarly, three-stage servo valves may use an intermediate stage spool valve to position a larger third stage spool valve. Three-stage servo valves are limited to very high power applications, where significant flows are required.

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