New flow conditioner removes swirl for accurate flow measurement

AMS Instrumentation and Calibration has introduced a new flow
conditioner from The Vortab Company designed to facilitate accurate flow
measurement in crowded municipal water treatment plants.

Process and plant engineers who can’t find room for the recommended
straight pipe run required by liquid flow meters in municipal water treatment
plant retrofits can use the Vortab Elbow flow conditioner to remove swirl and
asymmetric velocity profiles caused by pumps, valves and other equipment placed
too close to the meter.

To provide accurate and repeatable flow measurement, electromagnetic and
other types of flow metering technologies used in municipal plants for drinking
water require a specific amount of straight pipe run upstream and downstream
from the installed location of the meter. The straight pipe runs create a
swirl-free and symmetric velocity profile in the pipe that can be measured
accurately any number of times.

However, problems can occur due to lack of sufficient space when flow
meters are moved or added during retrofit projects at municipal water treatment
plants to accommodate new equipment such as pumps, valves or other devices.

The Vortab Company’s Elbow flow conditioner nearly eliminates the flow
meter upstream piping requirements by conditioning the flow stream into a flow
regime that mimics adequate straight run. Additionally, the 90-degree angle
tab-type Vortab Elbow flow conditioner eliminates the pipe cost and technician
labour for the 5-10 upstream and 3-5 downstream pipe diameters required by many
types of flow metering technologies.

Developed using the same tab-type flow conditioning technology as the successful
range of straight run Vortab flow conditioners, the Vortab Elbow’s unique
design was validated by installing ball valves, gate valves, out-of-plane and
in-plane elbows and swirl generators at the immediate inlet of the flow
conditioner and testing in state-of-the-art gas and liquid calibration
facilities..

The Vortab Elbow flow conditioner isolates the flow irregularities and
conditions the flow stream into a swirl-free and symmetrical velocity profile. Swirl
reduction and velocity profile correction occur naturally in long lengths of
straight pipe due to diffusion and turbulent mixing. Vortab’s anti-swirl and
inclined vortex generating profile correction tabs, projecting from the inside
pipe surface, generate vortices that accelerate these natural pipe effects to
create a uniform, non-swirling, symmetrical flow profile in a much shorter
section of pipe.

The simple, flexible designs of the Vortab Elbow, the Vortab Insertion
Panel (VIP) and the Vortab Insert Sleeve, Short Run, Meter Run and Field Kit
configurations provide a cost effective solution to crowded installations for
flow meters and other critical process equipment. Providing the most effective
flow disturbance isolation and lowest pressure drop, Vortab flow conditioners are
also the least affected by fouling in treatment plant applications.

Vortab flow conditioners can be made from carbon steel, 316L stainless
steel or Hastelloy C-276. The flow conditioner comes with a variety of process
connections including ANSI flanges, male NPT threads, butt welded preps or
retaining wafers. Custom configurations are also available from the factory.

For further information, please visit the AMS Instrumentation and
Calibration website www.ams-ic.com.au
or call 03-9017 8225, or Freecall (NZ) 0800 442 743.

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