Volume flow measuring system
December 2004
Flow Measurement & Control
According to European legislation, pollutant emissions of industrial plants must be monitored, making suitable measuring systems, such as Durag's D-FL-100, necessary to continuously determine the flow velocity and the flow rate of the exhaust gas. The D-FL-100's alarm levels are pre-selectable and any alarms will be indicated inertia-free, permitting necessary interventions in the plant control system so as to comply with prescribed emission limit values.
Operating on the principle of differential pressure, the D-FL 100 units are available in two types. The D-FL 100-I is designed for flow measuring without temperature and pressure compensation and the D-FL 100-II for flow measuring with temperature and pressure compensation. The probe has two separate chambers, between which, a pressure difference, caused by the flow in the duct builds up. The differential pressure at the probe is proportional to the square of the gas speed.
The volume flow can be converted from operational to standard conditions by the D-FL 100-10 microprocessor evaluation unit. For this purpose, two additional current inputs (0 to 20 mA) for a temperature probe and a pressure probe have been provided at the evaluation unit. If an emission evaluation computer is available, the evaluation unit is not required.
Special designs are available for use in aggressive exhaust gases. A Hastelloy flow probe is recommended for heating power plants, chemical plants and in paper manufacturing. For operating temperatures of over 600°C, an Inconel flow probe is available.
The lengths of measuring ranges offered are 400 mm to 2 m, 2 to 4 m or 4 m. Exhaust gas temperature over the exhaust gas dew point is up to 320°C. An automatic backflow purging feature is available as an option.
For more information contact Noel Bauchop, OEN Enterprises, 011 675 4447, [email protected], www.oenenterprises.co.za
Further reading:
New uncompromisingly simple flowmeter line for processes
Endress+Hauser South Africa
Flow Measurement & Control
The demand for simplicity in commissioning, operation and maintenance in industrial process plants has increased significantly in recent years. The new Proline 10 range of flowmeters from Endress+Hauser meets this requirement without compromise, because simplicity is the top priority.
Read more...
Rotork joins Rockwell Automation’s Technology Partner Programme
Flow Measurement & Control
Rotork has entered into the Rockwell Automation Technology Partner Programme, marking a significant step in expanding the company’s presence within the industrial automation landscape.
Read more...
Loop signature 29: Averaging or surge level control
Editor's Choice Flow Measurement & Control
There are many processes where it is undesirable for the load to suddenly change quickly, for example in the paper industry. Examples of level control have involved reasonably fast tuning. An example of a level loop tuned this way and responding to a step change in setpoint is given.
Read more...
A reliable water supply: The make or break in building metros across South Africa
VEGA Controls SA
Flow Measurement & Control
South Africa’s urban centres encounter substantial water supply challenges. Maintaining stable water infrastructure is essential for the health, economic vitality and well-being of communities.
Read more...
Uncompromising flow rate measurement
Burkert South Africa
Flow Measurement & Control
Bürkert’s FLOWave is a hygienic and safe flow measurement solution with many benefits for pharmaceutical or food production processes.
Read more...
Electromagnetic flow measurement
Siemens South Africa
Flow Measurement & Control
The SITRANS FM electromagnetic flowmeters from Siemens deliver high-precision volume measurement of electrically conductive liquid applications – from water, wastewater and irrigation to hygienic processes and even mining slurries with magnetic particles.
Read more...
ABB unveils next generation of electromagnetic flowmeters
ABB South Africa
Flow Measurement & Control
ABB has launched its latest generation of electromagnetic flowmeters, bringing unmatched accuracy, connectivity and flexibility to industrial and utility applications.
Read more...
Precision measurement for ultra-pure water systems
Flow Measurement & Control
[Sponsored] Ultra-pure water (UPW) is essential in industries where even minor contaminants can impact product quality and process integrity. Anton Paar’s L-Cor Coriolis mass flowmeters provide a highly accurate and hygienic solution by directly measuring the mass of the liquid using the Coriolis effect, ensuring a high level of cleanliness.
Read more...
Inline process solutions for gold mining
Anton Paar
Flow Measurement & Control
[Sponsored]The extraction and processing of gold ore requires precision and efficiency to maximise yield and minimise losses. Automation and continuous monitoring of critical process steps are essential to ensure optimal production. Anton Paar offers advanced inline measurement solutions which enable full automation and real-time monitoring of key steps in gold extraction and processing.
Read more...
Magnetic-inductive flow sensor
ifm - South Africa
Flow Measurement & Control
The SMF magnetic-inductive flow sensor revolutionises liquid and creamy flow measurement. With IO-Link, it enables digital data transmission, eliminating blind spots in production.
Read more...
printer friendly version