Swirl Reduction Tabs – The swirl reduction tabs remove swirl by generating small vortices (swirls) opposite to the main swirl. These cumulatively cancel the larger main swirl. Profile Condition Tabs – Three sets of profile conditioning tabs produce vigorous cross-stream mixing which rapidly mixes faster velocity regions with slower regions. This mixing quickly produces a homogeneous (i.e., conditioned) velocity profile. In addition, uneven particulate distributions or temperature profiles are made more uniform through this process. Settling Distance – 3-4 pipe diameters of settling distance between the flow conditioner and flow meter installation location are required to fully condition the flow stream.

Figure 2: Sample of Effects on Accuracy with Flow Obstructions Before and After Installation Point of Single-Point, Insertion Flow Meter With Pipe ID < 6 inches [150 mm] Distance From Flow Meter 19D17D15D13D11D9D7D5D3D1D1D3D5D7D9D
FLOWME T ER Obstruction Type: 90Ëš Elbow 0%0%<1%1%1%2%3%4%5%5%4%3%2%1%0%Two Elbows (with 4D between them)1%1%2%2%2%3%4% 6%8%9% 5%4%3%2%1%Gate Valve1%2%3%4%5% 6%8%10%17%20%15%13%8% 3%1%With Pipe ID
See Vortab discussions below on how to eliminate effect and improve accuracy. See Vortab discussions below on how to eliminate effect and improve accuracy. r 6 inches [150 mm] Distance From Flow Meter 19D17D15D13D11D9D7D5D3D1D1D3D5D7D9D
F LOWME T ER Obstruction Type: 90Ëš Elbow 0%0%0%0%0%<1%2%3%4%5%4%2%<1%0%0%Two Elbows (with 4D between them)0%0%<1%2%2%2%4%5% 6%8% 4%3%<1%0%0%Gate Valve0%0%<1%2%3%4% 6%8%15%20%15% 5%<1%0%0% X% : Application not recommended. Figure 3: Vortab Flow Conditioning Removes Swirl and Creates Uniform Flow Profile

Vortab Flow Conditioners Reduce Straight-Run

Swirl Reduction Tab (Typ.)Process Connection(ANSI Flange Shown) Profile Condioning Tab

In installations with inadequate straight-run, Vortab flow conditioners provide a solution that will ensure flow meter performance in as little as just 7 diameters upstream. This patented technology is the flow conditioner most recommended by flow and process control experts to eliminate the flow swirl and profile distortions which adversely affect flow meter measuring accuracy. Further, because Vortab achieves results with the least pressure drop, it actually saves significantly on energy costs over alternate techniques. FCI is the only authorized supplier of Vortab flow conditioners for use with thermal dispersion technology flow meters. Vortab are available as a spool-piece meter run section, an insertable sleeve and as a field weldable kit to accommodate a variety of installation needs.

INLET FLOW OUTLET METER RUN MODEL Settling Distance(3-4 pipe diameters)Conditioned FlowUnconditioned Flow (Side View)Conditioning Distance (3 dia. length)Discrete, Counter-RotatingVortices Generated bySwirl Reduction TabsSwirl ReductionTabs (End View) PROFILE CONDITIONING Settling Distance 3