Talk:Diving regulator

message: At first glance, this article suffers from TMI -- Too Much Information.  It is poorly laid out and goes into irrelevant detail.
* It should be rewritten, starting with the most general information first, then branching out into details.
* The information on the history of diving regulators is weak and needs to be pulled together.  Much of it revolves around Cousteau's modern development of the Aqualung, but an uninformed reader would have difficulty pulling this thread out of the article.
--QuicksilverT @ 20:08, 21 November 2005 (UTC)
thread_title:  TMI 

message: The A-type connector is also called Yoke. This should be mentioned in the article.Michagal 12:45, 13 August 2006 (UTC)
thread_title: A-type tank connector

message: "Overbalanced" - It seems that different manufacturers use this term to describe different effects. Scubapro uses it to mean boosting the IP (intermediate pressure) as the tank pressure falls. Whereas Apeks uses it to mean boosting the IP by an amount greater than the increase of water pressure, as depth increases.  While both of these are desirable refinements, I'm not sure that it aids clarity in the article briefly to define it as making it "easier to breathe at depth".
There are two design objectives for first stages - to make the breathing effort consistent independent of cylinder pressure and to make it consistent independent of depth.
That brings me to the question of what "Unbalanced" and "Balanced" mean?
My memory suggests that the oldest "unbalanced" regs had the characteristic of increased effort as tank pressure dropped, so that may have been the original issue that "balancing" addressed. I'd need someone who was diving in the 1970's and earlier or some reference from that era to be sure. This issue was addressed by designing so that cylinder pressure neither reinforces nor opposes the opening of the first stage valve. The idea of allowing water to exert pressure inside the valve to reinforce the IP is a different issue as it is meant to ensure that the IP remains about 9 bar above ambient at all depths (so that the second stage always has the same pressure differential across it).
Bearing in mind the TMI comment above, I don't think I can adequately explain of this concisely enough to suit. What's the solution? RexxS (talk) 00:45, 9 January 2008 (UTC)
thread_title:  Unbalanced, Balanced and Overbalanced first stages 

message: I tried not to exacerbate the TMI comment by forking this section off a smaller article Breathing performance of regulators but now that Gene has expanded the section with references to US standards, I wonder if I was right to make the smaller article? Would it be best to forget about the TMI and merge it into this section - or should we copy Gene's expansion into Breathing performance of regulators? What is best? --RexxS (talk) 17:24, 12 June 2008 (UTC)
replies: text: * I added the "main" link and transfered the information I recently added over to the Breathing performance of regulators page. I do not have any suggestions about cutting this section down but once the other page is expanded, this page will look small. --Gene Hobbs (talk) 03:49, 16 June 2008 (UTC)
thread_title:  Performance of regulators 

message: Somebody told me recently that Sherwood was the first company to mass manufacture regulators for the domestic market.  I haven't been able to find a written source for that, but if somone else can (assuming it to be true), that would be something that could usefully be included. --Legis (talk - contribs) 19:25, 28 October 2008 (UTC)
replies: text: it outdated the photo is reeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaally old I bet some info is old to Random kid who likes science (talk) 16:03, 8 April 2022 (UTC)
thread_title: History

message: Unbalanced regulator
Regulated pressure output is affected by supply pressure changes. 
On up stream valve one end of valve poppet is exposed to small area of regulated low pressure at HP orifice and opposite end of poppet is exposed to High Pressure. The larger the HP orifice the greater the pressure is unbalanced. This upstream valve pressure unbalance is trying to close the valve.  As gas is withdrawn from HP cylinder, pressure supplied to regulator decreases, unbalance decreases and regulated pressure rises. 
If Unbalanced Pressure Change is 0.5psi regulated per 100psi change in supply pressure, with 3,000psi cylinder pressure and regulator set to 150psi. That regulator with 500psi cylinder pressure, regulated pressure would be 162psi. If this pressure increase is unacceptable use smaller orifice which restricts flow. Larger diaphragm, improved leverage and better gas velocity boast (venture) might help performance. (This was done on single stage double hose regulators.) With diving regulators this regulated pressure increase helps flow rate at low bottle pressures. If down stream 1st stage or single stage regulator was used regulated pressure would decrease with cylinder pressure making gas flow rate worse. 
Balanced regulator
Regulated pressure stays same regardless of supply pressure as long as supply pressure is high enough to operate regulator and supply flow demand. HP Orifice can be larger to increase flow capacity. The up stream poppet had guide block that became low pressure balancing chamber. Poppet guide shaft was same diameter as HP orifice. Drilled passage through center of poppet and guide shaft filled LP balance chamber. If poppet guide shaft is less than HP orifice diameter regulator can have large HP orifice for higher flow capacity and regulated pressure rise at low cylinder pressure.
Piston Regulator
First piston first stage scuba regulator was Healthways Scuba Star. Design was not patented because it was step down of flow capacity and unknown life of dynamic O-rings  on piston. Exact design was made by everyone. Scuba Star was single hose regulator with upstream tilt valve 2nd stage. I have seen exact same first and second stage regulator used for decompression chamber O2 bibs masks. Tilt valve 2nd stage regulator can not act as relief valve so relief valve was installed on 1st stage. Scuba Star's intermediate pressure was 110psi as were all regulators at that time.
Flow Velocity Boost is part of all high performance scuba regulators 1st and 2nd stages. Many different designs to not infringe on patents. Higher effort is required to start flow and stop flow than sustain regulator flow.  —Preceding unsigned comment added by Fishblow (talk • contribs) 07:55, 14 September 2009 (UTC)
thread_title:  Unbalance regulator, balanced regulator advantages 

message: The page is currently in need of re-organisation. A more logical layout of components may help. I propose to describe the regulator as 1st stage, Demand valve/2nd stage, and accessories, as currently several accessories are lumped in with 2nd stages, which must be confusing for a lay person.Peter (Southwood) (talk): 13:13, 25 July 2011 (UTC)
thread_title:  Rearrangement of page 

message: The article is suitably referenced, with inline citations. It has reliable sources, and any important or controversial material which is likely to be challenged is cited. Any format of inline citation is acceptable: the use of <ref> tags and citation templates such as  is optional.Moderately referenced, but some references formatted at in line links, which should be fixed, and a lot unreferenced, though much of that is uncontroversial and should be fairly easy to reference. nevertheless, quite a bit of work needed. Quite well referenced, just a few outstanding, none critical. 
The article reasonably covers the topic, and does not contain obvious omissions or inaccuracies. It contains a large proportion of the material necessary for , although some sections may need expansion, and some less important topics may be missing. Probably true, but as the layout is not very good, it is not easy to be sure.Covers the topic quite well, though there may be some material which is not really necessary and there are a few aspects which are incomplete. 
The article has a defined structure. Content should be organized into groups of related material, including a lead section and all the sections that can reasonably be included in an article of its kind.Structure and layout can use improvement. There may be significant duplication of information due to layout issues.Structure much improved 
The article is reasonably well-written. The prose contains no major grammatical errors and flows sensibly, but it does not need to be "brilliant". The Manual of Style does not need to be followed rigorously.Not very clearly laid out. Information seems to be scattered. Room for improvement. Improved. 
The article contains supporting materials where appropriate. Illustrations are encouraged, though not required. Diagrams and an infobox etc. should be included where they are relevant and useful to the content.Good supporting materials. 
 Generally comprehensible. 
Needs work, but not out of reach. Clean up references, improve structure and much of the other problems will fall in line. • • • Peter (Southwood) (talk): 12:47, 26 September 2016 (UTC)
replies: text: Cleaned up a lot. More work needed for GA, but good for B. • • • Peter (Southwood) (talk): 19:34, 27 November 2016 (UTC)
thread_title:  Assessment for B-class 

message: I propose to delete any unencyclopaedic, unsourceable or trivial information from this section. If anyone has any objection, please discuss here before re-instating. Provide reasonably reliable references in all cases of dispute. • • • Peter (Southwood) (talk): 20:11, 15 November 2016 (UTC)
thread_title:  Section on Exotic examples 

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thread_title:  External links modified 

message: I propose merging Purge button into Diving regulator, as the purge button is a part of a regulator. The article is small, and unlikely to be expanded much, and much of the information is already in Diving regulator. • • • Peter (Southwood) (talk): 18:05, 21 December 2016 (UTC)
replies: text: No objections in a month. I will go ahead and merge with redirect. • • • Peter (Southwood) (talk): 07:52, 25 January 2017 (UTC)
replies: text: Done. • • • Peter (Southwood) (talk): 10:16, 25 January 2017 (UTC)
thread_title:  Merge proposal 

message: , I have removed unencyclopaedic and out of scope content again. The article is about diving regulators, not about poor quality comic book art. If you believe that this content belongs in the article, I suggest an RfC to establish a consensus on the appropriate scope of the article. • • • Peter (Southwood) (talk): 14:50, 23 July 2017 (UTC)
thread_title:  Unencyclopaedic/out of scope content 

message: I propose to merge Mouthpiece (scuba) into Diving regulator as it is a very small article, unlikely to be greatly expanded, about a component that is a part of a diving regulator. It can also be mentioned in Rebreather where it serves the same purpose. • • • Peter (Southwood) (talk): 11:02, 4 August 2017 (UTC)
replies: text: No objections posted, so will do the merge. • • • Peter (Southwood) (talk): 07:58, 17 August 2017 (UTC)
thread_title:  Merger proposal 

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified 

message: I propose splitting out the section on the mechanism and function of diving regulators to a new article.
*The cutrrent article is very large (109,267 Bytes), and this is a large and rather technical section. I think that replacing it in this article with a simplified summary, and treating the mechanical complexities in a stand-alone article will serve the reader better than the current arrangement.
*The proposed title for the new article would be Mechanism of the diving regulator of something similar. · · · Peter Southwood (talk): 15:12, 9 March 2020 (UTC)
thread_title:  Proposed split 

message: * The article is currently 64kB readable prose size, so WP:SIZESPLIT suggests that it "Probably should be divided (although the scope of a topic can sometimes justify the added reading time)". I think that the only likely problem is ensuring that the split-off topic meets WP:GNG for a stand-alone article. A rather specialised topic like "mechanism of diving regulators" is not going to attract much published attention by media independent of the subject, so several of the sources in that section are weak. For example, Scuba regulator maintenance and repair is published by Airspeed Press, which has a total catalogue of five titles, all of them by Vance Harlow; Hammerhead Press offers six books, five of them by Steven M. Barsky. It's hard to argue they are not effectively self-published sources, and the authors have no article, so the case for being a published expert in the field is weakened. That makes meeting GNG more difficult. --RexxS (talk) 15:45, 10 March 2020 (UTC)
thread_title:  Discussion