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4 offset Butterfly Valves ( Quadruple Eccentric )

4 offset Butterfly Valves ( Quadruple Eccentric )

4 offset Butterfly Valves ( Quadruple Eccentric )

(OP)
Hi,

I was wondering if anyone can provide me with manufacturers (name, brand and location) of 4 offset Butterfly Valves - Quadruple Eccentric.

I had Literature of an European manufacturer, however i let a colleague borrow it and is lost. I don't remember the name ether.
I also tried searching on Google without success.

Thank you in advance for your help on this.

RE: 4 offset Butterfly Valves ( Quadruple Eccentric )

Zwick a german manufacturer does tripple offset, Bray does double offset I didnt know a quadruple offset existed

RE: 4 offset Butterfly Valves ( Quadruple Eccentric )

Vanessa also makes a triple offset butterfly valve.

http://www.tycoflowcontrol-na.com/ld/RMISB-0018-US.pdf#xml%3Dhttp://www.searchtycoflowcontrol.com/texis.exe/webinator/search/pdfhi.txt?query=triple%20offset

What is the 4th offset? This is also new for me.

"Do not worry about your problems with mathematics, I assure you mine are far greater."   
Albert Einstein
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RE: 4 offset Butterfly Valves ( Quadruple Eccentric )

I'm having a hard time imagining how there could be four eccentric motions in a butterfly valve, given the number of moving parts.

I could imagine there being four physical eccentrics, arranged as two pairs, at extremes of the disc and shaft.

Mike Halloran
Pembroke Pines, FL, USA

RE: 4 offset Butterfly Valves ( Quadruple Eccentric )

UNSR60001,
       it is only six years I'm in the valve business, but I've never heard about Quadruple Offset valve design, me too.
        
       Whatever it is, to me it sounds like a fancy mistake or a marketing invention without much technical meaning...(?)



       In any case, many good discussions have been carried out within this Forum about Triple Offset valve design already. See, for example:

   -       thread408-64692: butterfly valve    about the type of design in general;

   -       thread408-145006: Butterfly valve design: conc, ecc, doubl ecc or triple eccentric?    about advantages and disadvantages;

   -       thread408-135872: The top three sellers for butterfly valve?    about the most important Manufacturers;

   -       thread408-141966: Triple offset butterfly valves    for a trouble-shooting case study;

   -       thread408-149142: Characteristics for triple offset butterfly valve    about the control characteristic;

   -       thread819-149326: Butterfly Sealing Techniques (Metal Seat Type)    about the sealing mechanism.


       To complete what mentioned by Ashereng, correct links for information about Tyco VANESSA are the following:
              http://www.tycovalves-eu.com/brands_results.asp?Selection=Vanessa
              http://www.vanessavalves.it



Hope this helps,           'NGL

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