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The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator. Another valve actuator is visible in the background, with windows to indicate the valve position. A valve actuator is the mechanism for opening and closing a valve. Manually ...
The six-year-old died in 2008 nine months after her injury despite subsequent surgeries. Scott and Katey Taylor, her parents, lobbied for the Virginia Graeme Baker Pool and Spa Safety Act, which was passed the year of Abigail's injury. [9] Salma Bashir 2008 During a holiday with her family, she was disemboweled while in the kids' swimming pool.
The Henry Pratt Company develops, manufactures and sells valves, valve actuators and control systems for use in potable water, wastewater, power, industrial, and nuclear applications. The company was founded in 1901 as a metal fabricating shop, and it designed and developed the first rubber-seated butterfly valve in 1926.
An automatic control valve consists of three main parts in which each part exist in several types and designs: Valve actuator – which moves the valve's modulating element, such as ball or butterfly. Valve positioner – which ensures the valve has reached the desired degree of opening. This overcomes the problems of friction and wear.
Electric rotary valve actuator controlling a butterfly valve. A rotary actuator is an actuator that produces a rotary motion or torque. The simplest actuator is purely mechanical, where linear motion in one direction gives rise to rotation. The most common actuators are electrically powered; others may be powered pneumatically or hydraulically ...
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