Why are control valves sometimes very noisy?
Noise is created by an object vibrating. The control valve components will tend to vibrate whenever they are subjected to high-velocity turbulent flow.
December 20, 2020
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Noise is created by an object vibrating. The control valve components will tend to vibrate whenever they are subjected to high-velocity turbulent flow.
Inherent characteristics are the flow through the valve (or CV) relative to the percentage opening (the pressure drop at both ends of the valve is
The most common features are shown in the figure above.The percentage of flow through the valve corresponds to the stem position.These curves are based on
The inherent flow characteristic of the control valve is the relationship between the flow and travel of the valve to a constant pressure drop across
The Venturi desuperheater adopts restrictive measures in the superheated steam pipeline to form a high-speed and turbulent area where cooling water is injected. This helps
In general, a vapour phase consists of a phase with two different substances at room temperature, whereas a gas phase consists of a single substance
Critical Flow Factor often referred to as “Cf” is a coefficient that defines how pressure will recover after it drops to its lowest point inside
Cavitation is common, so many control valves can withstand a certain amount of time. However, prolonged exposure to cavitation can severely damage the control valve.
Blocking flow is defined as a point at which increasing the pressure drop (△P) while maintaining a constant inlet pressure (P1) will not result in
Flashing occurs when a liquid flows through a control valve and evaporates to retain the vapor. Flashing has some characteristics in common with Cho flow
Cavitation is the formation and collapse of vapor bubbles (cavities) in the liquid flow streams caused by changes in pressure and velocity. There are four
Standard flow rate is a correction applied to an actual flow measurement based on a given temperature and pressure. The correction is applied using the
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