Types of Flow Meters
Flow is defined as the rate (volume or area per unit time) at which a substance travels through a given cross section and is characterized at specific temperatures and pressures. The instruments used to measure flow are termed flow meters. The main components of a flow meter include the sensor, signal processor and transmitter. Flow sensors use acoustic waves and electromagnetic fields to measure the flow through a given area via physical quantities, such as acceleration, frequency, pressure and volume. As a result, many flow meters are named with respect to the physical property that helps to measure the flow.
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Chapter 7 Control Valves
INTRODUCTION
In process systems, the final control element is normally a pneumatically actuated control valve, which is used to pneumatically actuated control valve, which is used to regulate the flow of a fluid. It provides the necessary power to translate the controller to translate the controller s' output to the process output to the process. Pneumatics is used because of the original popularity of
pneumatic control systems and the comparatively low pneumatic control systems and the comparatively low operating pressures used, also for safe operation in the hazards facilities hazards facilities.
As shown in the figure, in the basic components of a control loop, the control valve is subject to the harshest conditions.
A control valve is also the most expensive item and the most prone to incorrect selection.
Chapter 7 Control Valves
INTRODUCTION
In process systems, the final control element is normally a pneumatically actuated control valve, which is used to pneumatically actuated control valve, which is used to regulate the flow of a fluid. It provides the necessary power to translate the controller to translate the controller s' output to the process output to the process. Pneumatics is used because of the original popularity of
pneumatic control systems and the comparatively low pneumatic control systems and the comparatively low operating pressures used, also for safe operation in the hazards facilities hazards facilities.
As shown in the figure, in the basic components of a control loop, the control valve is subject to the harshest conditions.
A control valve is also the most expensive item and the most prone to incorrect selection.
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