The safety instrumented function (SIF) is used to monitor a selected process parameter and takes an executive action to make the process safe, if certain limits are exceeded.
An illustration of safety instrumented function in a process plant is shown … Read more
The figure below shows the control schemes applied to a direct-fired process heater.
From the diagram above, the heat from the burning fuel is applied directly to the tubes carrying the … Read more
Let’s consider the figure below:
In the system above, the output of temperature controller TC represents the process demand, and this signal is applied as one of the inputs, each to a … Read more
A steam generator is an item of plant equipment that is found in almost every manufacturing site, and its output of steam has many critical uses in a variety of production processes.
Steam has been assigned a measurement quality and … Read more
The figure below shows a typical basic furnace used to raise the temperature of a heat-transfer medium that is used on other equipment in a plant process.
From the figure above, the temperature of the … Read more
Valves are the final element in a control loop, and are critical in providing the correct flow. The valve, usually operates in very harsh conditions, and is one of the most costly elements in the process control system. Their … Read more
