The safety instrumented function (SIF) is used to monitor a selected process parameter and takes an executive action to make…
The figure below shows the control schemes applied to a direct-fired process heater. Fig: Combustion & temperature control on direct-fired…
Internally a PLC typically operates at 5 V dc. The external devices such as solenoids, limit switches, motor starters, etc.…
A computer is often used as part of a control system. The input data is typically from the operator’s commands…
Analog signals pass continuously through a full range of values for example a measuring device converts the process variable (PV),…
When steam-heated reboilers are used in distillation columns and the heating medium is steam, a flow control loop for the…
Let’s consider the figure below: Figure 1.0 Typical single-fuel cross-limited combustion control system In the system above, the output of…
The figure below shows a typical basic furnace used to raise the temperature of a heat-transfer medium that is used…
A lubrication oil temperature control system Lubrication oil temperature control system block diagram Lubricating oil reduces friction between moving parts…
A control system is a system of integrated elements whose function is to maintain a process variable at a desired…
