city

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Anonymous Poster	city 11/23/2010 6:32 AM
	hello every body. yesterday I asked question and I got reply from some and others said they did not understand what I mean I will repeat for them my question again . one said I have to ask for help in english I will said to him sorry I Know what I want to write may be it is difficult for you to understand so you need to ask for help in english in power plant there is a chemical plant and of course they used acid (H2SO4) and there is acid unloading pump and inside the pump there are permenent magnetic plate connected with the impler and one is outside the pump with the shaft of the motor . why they are using magnetic to rotate the I mpler and did not use the motor shaft direct coupling with the impler
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: city 11/23/2010 6:37 AM
	It's so that there is no shaft seal for the acid to leak through when something goes wrong. Magnetically-coupled pumps are ideal for agressive liquids handling, and are widely available. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Natarajan Commentator Join Date: Jul 2010 Posts: 60 Good Answers: 1	#2 Re: city 11/23/2010 7:20 AM
	So you are saying that instead of coupling they or using this magnet. Is it correct???
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Milo Guru Join Date: Jul 2006 Location: "Dancing over the abyss." Posts: 4884 Good Answers: 243	#3 In reply to #2 Re: city 11/23/2010 10:17 AM
	Yes he is. Milo __________________ People say between two opposed opinions the truth lies in the middle. Not at all! Between them lies the problem, what is unseeable,eternally active life, contemplated in repose. Goethe
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Tornado Guru Join Date: May 2009 Location: Richland, WA, USA Posts: 21017 Good Answers: 795	#4 Re: city 11/23/2010 10:58 AM
	This is to prevent leakage of corrosive, toxic, or highly valuable fluids through what would otherwise be a shaft seal or packing. The pump impeller is inside a "can" and has magnets built into it. The motor drives a matching array of magnets outside the can. __________________ In vino veritas; in cervisia carmen; in aqua E. coli.
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Milo (1); Natarajan (1); PWSlack (1); Tornado (1)

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