Related products

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  Process Control Eengineering

  Test Stand for Control Valves

  Control valves are an essential part of process and chemical engineering. The connection between controller and plant is realised with control valves as actuators. Control valves are usually used to regulate flows of gases or liquids. Optimum control loop design depends on a sound knowledge of control valve behaviour as well as a knowledge of the controlled system’s response. This mobile test stand allows to investigate and study control valves of different types. For this purpose the valve is installed in a closed water circuit with a pressure pump and a supply tank. Flow rate and pressure drop across the valve are measured. The trigger signal is generated by potentiometers and indicated on a display. Electrically operated motor valves can be investigated as well as pneumatic control valves. A data acquisition system can be used to record and evaluate characteristics and step responses on a PC.

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  Process Control Eengineering

  Process Control Rig

  The unit is used as an introduction to the subject of control technology. Temperature, flow rate and filling level control systems are used as examples to provide clear and practical fundamental information. The experimental system is controlled from the PC screen (not included in scope of supply). The supplied process control and illustration programs make it possible to carry out the experiment as well as record measurement reports and store measured data. Important process variables are shown digitally on the unit itself. All components of the unit are clearly mounted on a metal sheet. The storage and process tanks are transparent for better viewing of the process. The unit is designed as a experimental unit for tabletop use. It requires only an electrical power connection for operation.

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  Process Control Eengineering

  Level Control Demonstration Unit

  This training system provides a comprehensive experimental introduction to the fundamentals of process control using an example of level control. All components are clearly laid out on a vertical panel. The large-format process diagram provides an aid to understanding. A pump transfers water from a storage tank into the transparent process tank. The level is measured by an electronic pressure transducer installed at the base of the process tank. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is an electromagnetic proportional valve. A ball valve in the outlet enables defined disturbance variables to be generated. The controlled variable X and the manipulating variable Y can be tapped as analogue signals at lab jacks. This enables external recording equipment, such as a plotter or an oscilloscope, to be connected. An instrumentation and control software with interface module (USB) is available as an accessory. This enables the key process variables to be represented, and control functions executed. The well-structured instructional material outlines the technological fundamentals and provides a step-by-step guide through the experiments.

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  Process Control Eengineering

  Pressure Control Trainer

  This teaching and training system provides a comprehensive experimental introduction to the fundamentals of process control using an example of pressure control. The air pressure control system is a 2nd order system. It comprises two in-line pressure vessels interconnected by a restrictor valve. An additional valve on the second tank makes air tapping possible and so can be used to simulate a disturbance variable. A pressure transducer mesaures the pressure in the second vessel. The controller used is a state-of-the-art digital industrial controller. The actuator in the loop is a pneumatically operated control valve with a standardised current signal input. The controlled variable X and the manipulating variable Y are plotted directly on an integrated 2-channel line recorder. Alternatively, the variables can be tapped as analogue signals at lab jacks on the switch cabinet. This enables external recording equipment, such as an oscilloscope or a flatbed plotter, to be connected.