Question: Installation and clogging prevention of venturi flow meters in powder media
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I’m a newcomer here, posting for help for the first time. Recently, I have been studying the piping for powder transfer lines, and I noticed that in previous projects, the venturi tubes in many of these powder transfer lines were installed on vertical pipes; the flow direction of some media was from bottom to top, while for others it was from top to bottom. I would like to ask everyone: how should a venturi tube be installed in a vertical pipe? Also, since powder is being used, isn’t it easy for the Venturi flow meter to get clogged on site? How is it handled on-site, and what protective measures are needed? I checked, and the media powder is polypropylene; the design temperature is 70 degrees Celsius, and the design pressure is 4.0 MPA. I would be extremely grateful if an expert could provide some guidance and answers.
Take a look; maybe these can help you! The Venturi information I collected: http://bbs.hcbbs.com/thread-890833-1-1.html
Dear, thank you for compiling and sharing this information. I’m in the piping field, and I just wanted to get a basic understanding of it; after all, as a newcomer, I don’t have enough resources to go through so many documents related to venturi tubes. Could you explain it in simple terms, using your expertise?
It is generally not recommended to install it vertically; if vertical installation is necessary, the material should flow from bottom to top, rather than from top to bottom. The presence of particles can easily lead to blockages.
For DN1000 pipes, the venturi tube also requires straight sections before and after it, which demands a considerable amount of space； The powder pipe should also avoid too many bends, so it was installed vertically. Under those powder handling conditions, are there any measures to prevent clogging of the venturi tube, or what are the solutions to take if clogging does occur? It won’t need to be taken apart frequently for cleaning, right? Dear, I hope you can answer~
We don’t use venturi flow meters here, and I’ve never encountered such a situation personally. However, based on the structure of venturi flow meters, if it gets blocked, the only option is to disassemble it in order to clean it.