Low flow orifice meters
November 2002
Flow Measurement & Control
It is not always practical to use conventional full-line orifice plates to measure very low flow rates. Pro-Flow offers a solution, namely an 'integral orifice assembly', which consists of an orifice plate that is mounted in a cast orifice plate holder. The plate is sealed by means of PTFE jam seals and the whole assembly is connected to the pressure ports of a differential pressure transmitter, either directly or via a manifold, which has three or five valves - depending upon process requirements. The signal port spacing is standard to fit onto most differential pressure transmitters.
These integral orifice assemblies, which Pro-Flow manufactures locally, are available in many popular metals, including 316(L) stainless steel, 304(L) stainless steel and Hastelloy C. The plates can be made to any standard size as recommended by many manufacturers, or they can be bored to yield a given differential at a particular flow rate.
These integral orifice assemblies are usually supplied with the requisite upstream and downstream piping welded to the orifice plate holders, and the piping can be fitted with welded flanges or with the ends prepared for butt-welding. It is possible to supply the assembly without piping if this is desired. The assemblies are available in 1/2", 3/4", 1" and 11/2"sizes and they are suitable for measuring liquid, gas and steam flow rates.
For more information contact Jack Gitelson, Pro-Flow, 011 452 4877, www.proflow.co.za
Further reading:
Radiometric density measurements
Mecosa
Flow Measurement & Control
Radiometric density measurements are used wherever conventional measurement techniques fail. Successful applications can be found in a wide variety of industries, especially where harsh process environments and difficult measuring conditions prevail.
Read more...
Battery-powered magmeter
Flow Measurement & Control
The RWEM/D battery-powered electromagnetic flow meter from Royce Water Systems is ideal for water and wastewater systems located at remote sites.
Read more...
Precise process and maximum savings with VEGABAR
VEGA Controls SA
Flow Measurement & Control
Accurate measurementsof differential pressure is crucial for safety, efficiency and optimising operational processes. For over 40 years, VEGA has supplied industry-leading pressure measurement solutions, establishing itself as a trusted expert with a proven track record in sensor technology.
Read more...
Innovative solutions for low flow dosing with high precision
Mecosa
Flow Measurement & Control
n the food, pharma, and chemical manufacturing industries, precision and efficiency are of utmost importance. Bronkhorst High-Tech has developed a flexible solution that meets today’s requirements for highly accurate dosing, whether continuous, in ratio, or in batches.
Read more...
Battery-powered magmeter
Flow Measurement & Control
The RWEM/D battery-powered electromagnetic flow meter from Royce Water Systems is ideal for water and wastewater systems located at remote sites.
Read more...
Smart technology for municipal services
VEGA Controls SA
Flow Measurement & Control
A new wave of smart technologies has emerged from VEGA Instruments, promising a revolutionary impact on the efficiency and dependability of municipal services.
Read more...
Sustainable journey with hydrogen
Mecosa
Flow Measurement & Control
Bronkhorst High-Tech, the Dutch leader in flow measurement and control, has been focusing on hydrogen applications in the renewable energy market for some time, and for good reason.
Read more...
Optimise sludge treatment and reduce operational costs
Endress+Hauser South Africa
Flow Measurement & Control
The Endress+Hauser inline measuring devices, the Proline Teqwave MW 300 and the Proline Teqwave MW 500, determine the total solids content of wastewater directly through microwave transmission.
Read more...
No more blind spots in flow measurement of liquid foods
ifm - South Africa
Flow Measurement & Control
The SM Foodmag magnetic-inductive flow sensor takes the flow measurement of liquid and creamy foods to a new level.
Read more...
Plant signal conditioning
Omniflex Remote Monitoring Specialists
Flow Measurement & Control
Often, plant managers have a deep understanding of all the key operational challenges facing their facility, and have a broad knowledge of the instrumentation that can help solve them. However, they might not always be aware of the latest innovations that can make their lives even easier.
Read more...
printer friendly version