What is fast-loop
What is fast-loop
(OP)
In analyzer sampling system, fast-loop has been used very often, what does it mean by definition? Is there fixed configuration of fast-loop?
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RE: What is fast-loop
I usually refer to a fast loop when I intend the understanding to be that the flow rate is sufficiently high and/or the flow path to the analyser is short enough that the measurement response time is very fast.
This is the case where the analyser is located adjacent to the control point for the reaction or process.
Some analysers are located in an analyser house remote from the process. Here one encounters the term fast loop as meaning the primary sample flow into the analyser house which is relatively fast flowing and designed to bring the sample as quickly as possible to the analysers. Some analysers then have a separate loop from the fast loop and may have relatively low flows through them, if not intermitent flow (e.g. grab sample analysers which do not use a continuous sample flow).
JMW
www.viscoanalyser.com
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RE: What is fast-loop
RE: What is fast-loop
RE: What is fast-loop
most analyzers require such small flows that the sample delay would be unacceptably large otherwise.
Standard design, no, it generally requires a custom engineer design, that is specific to your process.
RE: What is fast-loop
Larger impluse line increase the volume of the sample. This is a bad thing for transport time and generally avoided. It may be a good thing for viscous or plugging problems.
There are sample taps that use the head from the center of pipe to extract the sample and a return at the pipewall for a localized fast-loop. Analyzer packagers use lots of sample handling tricks to provide a representative sample to the analyzer, especially if used for process control.
John