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  2. Butterfly valve - Wikipedia

    en.wikipedia.org/wiki/Butterfly_valve

    Butterfly valve with actuator electric valve - An electrically actuated butterfly valve is a quarter-turn valve controlled by an electric motor. It offers fast and precise flow regulation, remote operation, and versatility for various applications.

  3. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Valves can be categorized into the following types, based on their operating mechanism: Ball valve, for on–off control without pressure drop. Ideal for quick shut-off, since a 90° turn completely shuts off, compared to multiple 360° turns for other manual valves; Butterfly valve, for on–off flow control in large diameter pipes

  4. Four-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Four-stroke_power_valve_system

    A four-stroke power valve is a device fitted to four-stroke engines that constantly adjusts the internal diameter of the exhaust system to better suit the speed of the engine. Yamaha was the first to develop such a system, called the Exhaust Ultimate Power Valve (EXUP). [1] It first appeared on the Yamaha FZR EXUP and was later used on many ...

  5. Exhaust brake - Wikipedia

    en.wikipedia.org/wiki/Exhaust_brake

    The butterfly valve has one to three holes in it so that there is not a complete blockage of the exhaust pipe. This assures the avoidance of damage due to high pressure. When the brakes are released by the driver, the cylinder generates pressure so that the butterfly valve is opened and allows the exhaust gases to flow into the exhaust pipe.

  6. Flow control valve - Wikipedia

    en.wikipedia.org/wiki/Flow_control_valve

    Pneumatically-actuated globe valves and diaphragm valves are widely used for control purposes in many industries, although quarter-turn types such as (modified) ball and butterfly valves are also used. Control valves can also work with hydraulic actuators (also known as hydraulic pilots). These types of valves are also known as automatic ...

  7. Time limit for child sex abuse claims to be removed - AOL

    www.aol.com/time-limit-child-sex-abuse-015948654...

    February 4, 2025 at 8:59 PM [PA Media] A three-year time limit for child sexual abuse victims to sue for damages will be removed in England and Wales under "long overdue" government reforms, the ...

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