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

  Temperature Control Apparatus with Experimental Panels

  This instructional system is used to examine a simple temperature control unit. It consists of clearly arranged modular experimental panels which are suspended in a frame and connected with cables. A soldering iron equipped with a thermal element is used as the temperature control system. The temperature can be read on a digital display with a measuring transducer. The system includes a digital industrial controller which can be configured continuously as P, PD, PI and PID controller. It is possible to also use it as a two-point controller. The manipulated value can be indicated on a bar diagram. An electronic power control completes the system. The student has the opportunity to get familiar with the components of a control circuit, to interconnect them and vary their parameters. All components are of a sturdy design and therefore well suited for student experiments.

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  Process Control Eengineering

  Training System Speed Control

  This compact teaching / training unit offers every opportunity to learn the fundamentals of process control through experimentation on a speed control system. The experimentation set-up is mounted on a solid housing which accommodates all the electronics. A transparent protective cover permits safe observation of the experiments. A DC motor drives a shaft with a mass flywheel. The dial gauge allows the speed to be read off directly at any time. The speed is measured inductively using a speed transducer. The output signal from the transducer is sent to the software controller. The output signal from the controller influences the motor current. A generator acting as a mechanical resistance to shaft rotation can be activated by the software to study the influence of disturbance variables. The powerful state-of-the-art software is an integral part of the training system, embodying the principle of hardware/software integration (HSI). It enables the experiments to be conducted and evaluated in a user-friendly manner. The software has network capability. The link between the practice system and the PC is made via a USB port. Clearly structured and comprehensive instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

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  Process Control Eengineering

  Fluidised Bed Formation

  Bulk solids can be transformed from a packed bed into a fluidised bed when liquids or gases pass through them. The areas of application of fluidised beds include the drying of solids and a wide variety of chemical processes.Features two transparent test tanks for fluidised bed formation in water and air. A diaphragm pump delivers water from a storage tank into the bottom of the left side test tank. The water flows upwards through a porous sintered-metal plate. On the sintered-metal plate is a bulk solid. If the velocity of the water is less than the so-called fluidisation velocity, the flow merely passes through the packed bed. At higher velocities the bed is loosened to such an extent that individual solid particles are suspended by the fluid. If the velocity is increased further, particles are carried out of the fluidised bed. A filter at the top of the test tank holds these particles back. The water flows back into the storage tank. The right-side test tank is similar in construction to the left-side one. A stream of air generated by a compressor flows through itManometers are mounted on both test tanks to measure the pressure loss. The flow rates are adjusted by way of valves, and can be read from flow meters. The test tanks are removable. This makes it easy to change the bulk solid filling..