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The most common final control element in the process control industries is the control valve. The control valve manipulates a flowing fluid, such as gas, steam, water, or chemical compounds, to compensate for the load disturbance and keep the regulated process variable as close as possible to the desired set point. [1]
Advanced FLOW engineering (aFe) is a manufacturer company founded in 1999 and headquartered in Corona, California, United States, in two facilities: the 77,000 sq ft (7,200 m 2) headquarters and manufacturing facilities; and the 87,000 sq ft (8,100 m 2) warehouse and R&D facility, which was added in 2012.
In 2009, Blackhall Engineering supplied four 60" bore Larner–Johnson valves to New York City Department of Environmental Protection for the Ashokan Reservoir in upstate New York. Each valve is capable of passing a flow rate of 19 cubic metres/second, which is the equivalent of 19 tons of water per second.
Active control requires actuators that require energy and may operate in a time-dependent manner. [1] Active flow control includes steady or unsteady suction or blowing, [2] the use of synthetic jets, valves and plasma actuators. Actuation may be pre-determined (open-loop control) or be dependent on monitoring sensors (closed-loop control).
MeadWestvaco was a producer of packaging, specialty papers, consumer and office products and specialty chemicals.The company had 153 operating and office locations in 30 countries, and served customers in over 100 countries.
Oroville Dam is an earthfill embankment dam on the Feather River east of the city of Oroville, California, in the Sierra Nevada foothills east of the Sacramento Valley.At 770 feet (235 m) high, it is the tallest dam in the U.S. [8] and serves mainly for water supply, hydroelectricity generation, and flood control.
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