About selection of valves and process and not a constructive 1

[ENGMechanical]

I opened this topic for discussion on the criteria for use of valves. Usually there is always only the literature on the constructive part of the valves, and almost never on the criteria for selection and use of valves. Does anyone know any simple criterion or book, or form that describes a simple part of the process, use, classification and selection of valves? When using globe or butterfly. Available in the literature says that butterfly does not have good sealing properties, but manufacturers are already saying that their butterflies have excellent tightness. Already in the gas lines are not recommended. There is a criterion, link, site, a book that explains this process more fully?

 

[zdas04]

That is a tough one. There are books, but none I would recommend. They all seem to latch onto manufacturer's claims and don't add any field experience. Starting at page 147 in the document at Classroom Handouts I try to address those kind of issues, but you can bet that more than a few folks here will have other opinions on the subject.

David

 

[Actionman123]

Agree with zdas04, that is a tough one!

Statoil (Norwegian oil company) have made a valve selection manual to be used for their projects.
Not to much info on why they have concluded as they have, but a lot of information on what type of valve to use in different services.

The link:

http://www.tr2000.net/TR2000/document_space/get_document.jsp?docid=20101012124445&fr=1

AKA milanflyer@

http://www.valvezone.com

 

[MortenA]

You could look at the fisher control valve handbook. Its free and quite comprehensive. Get it from the Fisher web pages.

Best regrads

Morten

 

[Actionman123]

Here is the link to the book that MortenA is talking about:

http://www.documentation.emersonprocess.com/groups/public/documents/book/cvh99.pdf

AKA milanflyer@

http://www.valvezone.com

 

[moltenmetal]

You're not going to find a comprehensive single reference on this subject. The basics are pretty straightforward, but the details change as time goes on and as valve technology improves- and as existing valve technology gets cheaper.

 

[SNORGY]

ENGMechanical:

Try getting a hold of and having a look through this book:

Valve Selection Handbook - Engineering Fundamentals for Selecting the Right Valve Design for Every Industrial Flow Application (5th Edition)
Edited by: Smith, Peter; Zappe, R.W. © 2004 Elsevier

Regards,

SNORGY.

 

[terje61]

Hello ENGMechanical,

In spite of the good references above, note that none of them will ever be complete. Since different applications with different medium compositions at different locations quite often require different solutions.
The best way to learn if a valve is suitable for an application is to ask for the experience of 'the guys in the field'.

.... experience and grey hairs seem to keep eachother in balance

Regards,
Terje

 

[Burdy]

I agree with terje61, if you go and specify a valve and its wrong it comes down to you, is the application your reading about 'EXACTLY' the same! Both the manufacturers and people on the plant know what works and what doesn't. Manufacturers have a wealth of experience built up over decades of applications. Most have an application log.
Get a quote for your perticular application.
I've been on exactly the same PE plant through out different locations in the world and all had thier own character and needed different valves.

 

[ENGMechanical]

Dear; zdas04; Actionman123; MortenA; Actionman123;
moltenmetal; SNORGY; terje61; Burdy and all others. My sincery thanks. As noted by our colleague, the question is a perfect stepping on each valve and the valuable experience overall in the field. Design a flowchart of a plant, or steam, PSA, Haber Bosch or a gas line, just so. Obviously a manual does not solve years of experience. I thank you all. The documents that you send is very helpfull. Best Regards. Edy

 

[Pumpsonly]

zdas04,
Thanks for sharing.. I like you slide #181 hahhah

 

[jeffvalve]

Dear Edy

This book is quite useful as a general guide
Published by the BVAA

http://www.bvaa.org.uk/user_manual_2011.asp

JV

 

[zdas04]

Pumpsonly,
I had a Chinese speaker in the class the last time I put it on and he said that the translation was a bit literal, but not too far wrong.

For those that don't want to bother downloading an 8MB file, I suggest on that slide (with tongue firmly in cheek) that an adequate Safety Program might be a sign saying "Dying Right Here Strictly Prohibited". It is a translation from some Chinese characters.

David