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Flow Measurement · Glossary

What is a Flow Conditioner?

installed upstream of the meterFlow Measurement

A flow conditioner is a device placed upstream of a meter that removes swirl and restores a stable velocity profile.

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Flow Conditioner Explained

Conditioners are perforated plates or tube bundles. They break up swirl and flatten distorted profiles so a meter can be installed closer to fittings.

ISO 5167-2 lists compliant conditioners for orifice plates with their installation distances. They add some pressure loss.

Flow Conditioner: Typical Values

Tube bundleremoves swirl, less effect on profile
Perforated plate (such as Zanker or NOVA types)removes swirl and corrects profile
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Calculators for Flow Conditioner

CalculatorStraight Pipe Run CalculatorFree online calculator with formula and worked example.

Frequently Asked Questions

What is a Flow Conditioner?

A flow conditioner is a device placed upstream of a meter that removes swirl and restores a stable velocity profile.

Does a flow conditioner remove the need for straight pipe?

No, it shortens it. The conditioner itself needs a set length before and after it.

Can conditioners foul?

Yes, in dirty service the holes can block, which changes the DP and the profile.

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What factors affect the stability of flow meter readings?

A practical guide on instrumentationblog.in with more detail on flow conditioner and how it is applied on real plants.

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