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In the section Valve#Two-port_valves it is stated that "examples of normally-closed (NC) valves are sampling valves"; this is correct. However, "Examples of normally open (NO) valves are isolation valves", this is not correct, imho. I engineering, typically isolation valves will be NC because in case of a problem (e.g. no power supply) they should close automatically. Even if they are open during normal operation, they are officially NC valves. I will change that if there are no objections. Dvh369 (talk) 09:14, 21 September 2011 (UTC)
Type of Valves
I unlinked switch because 1) valves are not usually understood as switches and 2) the switch article is only about electrical switches. I unlinked "flow" partly because there is no longer an article about flow, and partly because, as I think it would be impossible to make a reasonable article called "flow", I don't want to encourage the creation of a new one. --Ryguasu 00:39 Dec 3, 2002 (UTC)
I changed the name for freeze valves to freeze seals. My source is the Nuclear Regulatory Commission. http://www.nrc.gov/reading-rm/doc-collections/insp-manual/technical-guidance/tgfplugs.pdf —Preceding unsigned comment added by Gordongoude (talk • contribs) 20:29, 2 February 2010 (UTC)
What's name for a simple one-way valve composed of a spring pushing a BB in the upstream direction against a seel so that downstream flow opens the valve but upstream flow isn't possible? —Ben FrantzDale 03:44, 7 April 2006 (UTC)
Valves of veins
Maybe there should be a link to VALVe (Valve-Software) ? because it's more know under the name valve then valve-software ^^ sincerely, NiHiliM 17:18, 8 January 2007 User:22.214.171.124
No mention of electrical valves
No mention is made about the electrical valves that was partly replaced by transistors. The defenition must thus also be elaborated to include the regulation of electrical current 126.96.36.199 19:03, 24 August 2007 (UTC)
- The disambiguation page for Valve, pointed to on the top of the page, shows the way to Thermionic valve. --jpgordon∇∆∇∆ 18:23, 25 August 2007 (UTC)
No mention of piezoelectric pneumatic valve
A piezoelectric solenoid valve has low response times (~100s of micro seconds), a unlimited service life (more than 1 billion cycles), and extremely low power consumption (~0.01 W). May be should be added to the Solenoid_valve article. Larytet
A great article
TO the author: as a writer and editor with little or no knowledge of valves, I have this to say: your article is a freaking MASTERPIECE! Detailed. Well-written. Informative. Great job, and THANKS! 188.8.131.52 14:33, 24 October 2007 (UTC) (<???...tildes? Whatever...you wikis are WEIRD...)
Now I understand the tildes!
Engineering Drawing Request
|It is requested that a mechanical diagram or diagrams be included in this article to improve its quality. Specific illustrations, plots or diagrams can be requested at the Graphic Lab.|
For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images.
It would be extremely helpful to include more images especially engineering cutaway type diagrams (the kind you might find in a valve manufacturer's catalog) of standard valve types ( ball, gate, check, butterfly, globe, plug, needle, guage) pointing out applicable features, ( flange, raised face flange, stem, disc, wafer, bonnet, spring, ball, port, trunion mount, threaded connection, handwheel etc.). Excellent (but proprietary) examples are contained here: http://www.henrypratt.com/products/drawings/RD%20Series%20Check%20PG%202.pdf https://www.ancorp.com/LinePhoto/B1075-QF16-IL.jpg http://www.asahi-america.com/documents/documents/Asahi-English/Manual%20Globe%20Valves.pdf 184.108.40.206 20:02, 31 October 2007 (UTC)
- Following up, it would also be great if we could have some pictures of the actual (physical) cutaway if anyone feels like talking to a valve manufacturer (Offshore Technology Conference or another industry gathering might be another good place to get the photos)220.127.116.11 20:08, 31 October 2007 (UTC)
2-port valve isn't always 2-way
In the article, it is stated that 2-port valves are always 2-way. This is untrue and very confusing for the article
I suggest changing the articles from 2,3,4-way valve to 2,3,4-port valve. The line mentioned needs to be deleted.
Finally, 1 port valve needs to be added and the article made. It should be mentioned in the valve operating positions section that Return valve and Non-return_valves exist. —Preceding unsigned comment added by 18.104.22.168 (talk) 12:09, 4 June 2009 (UTC)
What in the world is a one-port valve? Ports are the openings in the valve. So if it only has one port, isn't it a cap? Can somebody with a copy of the ISA Valve Handbook please contribute to this article? Also, there seems to be confusion about whether or not "#-way" and "#-port" are equal. They are not. For instance, I frequently use five-port, four-way, two-position valves for pneumatic controls. Here's a good illustration. -22.214.171.124 (talk) 16:17, 3 August 2009 (UTC)
- PLEASE LET ME KNOW WHAT IS THIS RTJ TYPE VALVES. 07:30, 12 November 2009 User:126.96.36.199
blowing and blow-off phases
Full bore, lifting
What is a duplex valve?
Why does this article contain the template for "Reciprocating engines and configurations" at the bottom? Valves are in no way bound to engines and I suggest it be removed. Is there a template for valves? Otherwise I would suggest one be made. 188.8.131.52 (talk) 08:03, 1 February 2011 (UTC)
Could someone provide a definition for "industrial valves" please?
I find the term confusing as it is sometimes used to define valves used in the industry (chemical, power, oil & gas). Other times it is all encompassing. Thus when it comes down to water it is not clear whether the term covers water & waster as well or solely industrial water. —Preceding unsigned comment added by 184.108.40.206 (talk) 09:18, 5 April 2011 (UTC)
From my experience all valves with a size smaller than 1 1/2" are "household". So for industrial valves you can expect that they are simply bigger than 5/4 inch or DN32 (process connection size / pipe size). — Preceding unsigned comment added by 220.127.116.11 (talk) 07:17, 9 April 2018 (UTC)
I think the classification done over here is somewhat confusing as is wrt there way of operation by solenoid/hand/fluids etc; it would be more systematic and easy to understand different types of valves if these are classified wrt principle of operation viz. linear or rotary etc. Please have a look at this link; if you like the idea you may improve the article accordingly.JPMEENA (talk) 04:37, 5 November 2012 (UTC)
History of Development
After hearing the valve was first developed in AD 75 on the History Channel's 101 Inventions I thought it would be worthwhile talking about the development of valves since they first appeared.--Graham Proud (talk) 00:12, 26 November 2013 (UTC)
- The Greeks and Romans had plug cocks (1/4 turn, still used today) long before that. Andy Dingley (talk) 01:35, 26 November 2013 (UTC)
- Gate valves are nearly as old as irrigation, and all those water-, steam-, and air-powered gadgets from the Helenic period used a variety of valves, including check valves, needle valves, etc. I agree that a history section on one of the most important areas of technological development is very necessary!Ernest Ruger (talk) 16:57, 14 September 2014 (UTC)
The paragraph two-port valves says this "Some valves are specially designed to regulate varying amounts of flow. Such valves have been called by various names such as regulating, throttling, metering, or needle valves." I think the name is proportional valve. Besides, it should probably not be in this paragraph. — Preceding unsigned comment added by 18.104.22.168 (talk) 13:53, 15 August 2014 (UTC)
Semi-protected edit request on 13 August 2015
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You didn't add the obvious relief valve, nash float valve to remove gas from the system, throw valve for rapid open and shut valve, test pressure station valve, simple drain valve, bypass valve, bleed valve for slowly releasing gas into the atmosphere, vee valve or metering valve for small minute operation also known as a regulation valve, potential valve used to electrically regulate flow.
- Not done: as you have not requested a specific change in the form "Please replace XXX with YYY" or "Please add ZZZ between PPP and QQQ".
More importantly, you have not cited reliable sources to back up your request, without which no information should be added to, or changed in, any article. - Arjayay (talk) 17:30, 13 August 2015 (UTC)
Valves in biology
An articles on valves that mentions their existence in biology but has nothing further to say about that aspect is not an article about valves, it's an article about valves in human engineering. For example, is it foolish to think that an article on valves might explain the free valve and attached valve of a rudist? 22.214.171.124 (talk) 20:36, 12 November 2015 (UTC)
Semi-protected edit request on 29 August 2018
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Add citation to the following centence "Valve bodies are usually metallic or plastic. Brass, bronze, gunmetal, cast iron, steel, alloy steels and stainless steels are very common." - https://www.actuation.co.uk/valve-body-types
The relationship between valves and logic gates
Hello everyone, I truly wish that this wiki page could add the content mentioned above, because this information is very important in the field of engineering, so I would like to use this wiki discussion page to present my own opinion, hoping to receive some advice from seniors as a junior. Dominic3203 (talk) 16:01, 28 January 2019 (UTC)
Semi-protected edit request on 27 March 2019
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Valve is A mechanism that controls the flow of fluid in a pipe or tube. Many human-built systems also use valves. A car engine is called an internal combustion engine because it burns (combusts) fuel in chambers inside the engine. Internal combustion engine: A device that provides power by burning fuel within its cylinders. Cite error: There are
<ref> tags on this page without content in them (see the help page).
https://mixer.com/SniffiestMite21 126.96.36.199 (talk) 10:39, 27 March 2019 (UTC)