RE: Flowmeter for hot Fluosilicic Acid

From: <Steve>
Date: Tue Apr 27 2004 - 05:59:00 EDT

Thanks C Ponnu
I had been thinking about venturis as experience has shown that orifice plates do not last in this application. Not sure how well a venturi would last; thats why I was wondering about a bend meter. However you have talked me into it; I will try a venturi. A water purge on the impulse lines should stop blockage. I believe relative accuracy is more important than absolute accuracy in this application.

At 50 C we can also use Hastelloy C; its the higher temperatures that seem to cause the problem.

Thanks again

Steve

-----Original Message-----
From: PONNU C [mailto:c_ponnu@yahoo.com] Sent: Tuesday, April 27, 2004 7:16 PM
To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] Flowmeter for hot Fluosilicic Acid

Dear Steve,

I have seen ,though for a lower temperature of nearly 50 deg C, Diaphragm pumps with Hast C head and PTFE diaphragm working successfully. These pumps were made by LEWA of Germany.

For the flow meter would you like to consider caliberated venturies with PTFE lining ?

Regards

C Ponnu

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