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About selection of valves and process and not a constructiveHelpful Member! 

ENGMechanical (Military) (OP)
15 May 11 12:10
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?
Helpful Member!  zdas04 (Mechanical)
15 May 11 15:46
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.

Actionman123 (Petroleum)
16 May 11 4:40
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:

AKA milanflyer@

MortenA (Petroleum)
16 May 11 5:14
You could look at the fisher control valve handbook. Its free and quite comprehensive. Get it from the Fisher web pages.

Best regrads

Actionman123 (Petroleum)
16 May 11 5:20
Here is the link to the book that MortenA is talking about:

AKA milanflyer@

moltenmetal (Chemical)
16 May 11 7:39
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 (Mechanical)
16 May 11 9:37

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  



terje61 (Mechanical)
17 May 11 8:13

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 smile

Burdy (Mechanical)
20 May 11 13:13
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 (Military) (OP)
21 May 11 14:33
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 (Mechanical)
21 May 11 23:37
Thanks for sharing.. I like you slide #181 hahhah
jeffvalve (Mechanical)
31 May 11 8:26
Dear Edy

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

zdas04 (Mechanical)
31 May 11 8:54
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.


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