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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]
A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. [1] This enables the direct control of flow rate and the consequential control of process quantities such as pressure, temperature, and liquid level. In automatic control terminology, a control valve is termed ...
Thayer axial flow valve on a tenor trombone. The axial flow valve, or Thayer valve, is a brass instrument valve design patented in 1978 by Orla Ed Thayer. [1] Designed with assistance from Zigmant Kanstul, it was originally intended to replace the traditional rotary valve on the French horn, but instead revolutionized the design of trombone valve attachments. [2]
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Relief valve - Wikipedia ... Relief valve
The Zippy Sport is a single-seat, high-wing monoplane powered by a 50 hp (37 kW) Rotax 503 piston engine. Other engines have been fitted, including VW. Of mixed construction, it has a welded 4130 steel fuselage and wooden wings covered with doped aircraft fabric covering and fixed conventional landing gear. The wings are designed to be folded ...
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