Temperature Controller Problem
Suppose a chemical reactor is heated by steam. A temperature controller varies the amount of steam admitted to a “jacket” surrounding the reactor: Temperature Controller Problem Ever since this process…
How Valve Positioners act as Cascade Control Systems in a Loop?
Explain how all valve positioners essentially act as cascade control systems in a loop, and why valve positioners generally improve control quality as a result. Valve Positioners Furthermore, examine this…
Problem on Water Filter Discharge Pressure Transmitter and Gauge
In this article, we are discussing an example problem on water filter discharge pressure transmitter and gauge, and these two readings are not matching. Water Filter Discharge Pressure This water…
Control Valves Pre-Commissioning Checklist
In this guide, we have the control valves pre-commissioning checklist which includes installation, inspection, testing, and taking valve online.
What LIC and FIC Controllers will do?
In this example problem, we discuss about both LIC and FIC controllers and what will they do over time if the flow or level transmitter fails or if control valve…
Problem in Water Level Control System
This water level control system (for a municipal water supply operation) is supposed to maintain constant water level in the filter and in the clearwell. Unfortunately, it has a problem.…
Burner Safety Logic for Initial Lighting
In this article we will go throw some Standard burner safety logic for initial lighting of the burner and also we are going to implement these logics in ladder format…
Problem on Pressure and Level Control Loops
Examine these pressure and level control loops (transmitter-controller-valve systems) for an industrial boiler, controlling both water level and steam pressure: Pressure and Level Control Loops If the PIC setpoint is…
Cascade Temperature Control System
Explain the operation of this cascade temperature control system: Cascade Temperature Control System Cascade control systems (also called two-element control systems) have two control “loops” functioning: a master and a…
What are Pre-Shutdown, Shutdown, and Post-Shutdown?
Basically a plant maintenance shutdown is split into three steps, which are as follows: Pre shutdown Shutdown Post shutdown Pre-shutdown: Pre-shutdown is preparation for the shutdown. It is classified into…
