Process Plant Module
The Process Module contains the vessels, pumps, valves, transmitters, and the other elements to support the control of these loop types:
Temperature loop - Uses a vessel located in the bottom of the module, as the reservoir for heated fluid and contains a temperature sensor and a level indicator. Fluid is pumped from here for heating and/or cooling in other vessels. The second and third vessels in the process trainer consist of two tanks, which are five feet tall and transparent so that two fluid levels can be seen by the students. The purpose is to simulate a jacketed process reactor or heat exchanger. A separate heat exchanger allows manual introduction of a heat load (cold water) to the temperature loop.
Ratio control - Uses most of the elements just described for temperature control.
Level control loop - Can be configured to control the level of heated fluid in the temperature controlled vessel. It can be single loop, or a cascaded loop on inflow to the tank. The feedforward lop can also be added. It will hold the level with load changes of tank outflow done with the hand controller on an outlet valve.
Three-element control - Level control of very agitated vessels, such as boiler steam drums is done with feedforward control with feedback trim.
Flow control - Automatic and manual flow control is performed on tank inflow and outflow as desired.
Pressure control - Pressure control can be performed on the pressurized steal vessel by modulating a control valve in response to pressure changes caused by flow out of the vessel.
Hand control - hand indicating controller can be selected to drive a valve on inflow or outflow to the jacketed tank. This permits manual control of inflow or outflow or load on the vessel under level controls.
The APT series supports both entry level and advanced topics of control system engineering and instrumentation training including: Control System Design, Computer Operations, Start-Up Training, and Loop Troubleshooting. It can also be used as a backup module for engineers to develop a new system configurations and management schemes.