Stainless steel hardline tubing project.

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You can make your own pretty easily with PMVs. They are only $79 each new from Bauer
Duh? Of course! Why didn't I think of that? I have an extra PMV laying around. Two more and I think I could make that work. Now you got me thinking. Standby....
 
You can make your own pretty easily with PMVs. They are only $79 each new from Bauer

Interesting idea. The local dive club is unable to convince members to use the cascade the right way, which vastly reduces its utility. Never thought of using PMVs. I'll pass that along. (I have my own cascade and don't mind turning the valves as I use it.)
 
Duh? Of course! Why didn't I think of that? I have an extra PMV laying around. Two more and I think I could make that work. Now you got me thinking. Standby....
The stuff I design and build for others is far superior to the stuff I use for myself. I use the tank valves if I need to shut things down. All of the banks remain linked and open shut down only at the main panel on my personal system. The only time I ever shut down individual tanks is when a burst disc lets loose.
 
Mate did you open this link

The blue bit---PRESS HERE---LINK--- Tubing --LINK---PRESS HERE---The blue bit

and all the other links inside
 
Mate did you open this link

The blue bit---PRESS HERE---LINK--- Tubing --LINK---PRESS HERE---The blue bit

and all the other links inside

Yes, great content. Thank you for taking the time to link your content. It is clearly apparent that you did extensive work on your cascade system and then took the time to explain your actions and their results. I had not yet seen your content, therefore I am grateful you included your link. I apologize for not acknowledging your efforts sooner.
I hope to make my much smaller cascade system much more organized looking than yours. I hope to make mine not look like an afterthought of an afterthought followed by another afterthought. I have purchased both a bender and flair tool today, for more money than it will return to my system. I am sure you are likely chuckling at what I do not yet understand about tube bending and flaring. I will hope for the best in that. So I will update everyone as my project progresses. I will also post photos of the cylinder valve stand I am machinating for my test bench. That is the primary reason I need to run HP air, 40 feet and that of course is what is requiring me to learn how to flair and bend tubing.
 
OH NO MAN THAT MAGNIFICENT WORK OF ART IS NOT MY STUFF MAN!

Yeah try a few pigtails, that bending is a real art form, Swagelok has a grouse video




We don't do flaring, there is NO flaring



You can make your own pretty easily with PMVs. They are only $79 each new from Bauer

Tracy you've always got the smartest done it practical ideas
But considrering my Aussie dollar is only 62 cents to your US
All I can grab from Bauer that's only $79 is 2/3s of a gasket
or a valve tool



 
Every decision you make in life requires a level of consideration and I would like to add in the case of working on high pressure gas applications you apply some additional level of due consideration.

The reason is pretty straightforward it is to postpone for as long as possible an appointment with God and standing before him having to explain why you arrived so early and in such big hurry before the cave divers on rebreathers. Here are your options:

Its not all about the pressure rating its about the rip back at burst
Tubing has a habit of ripping back if a fitting were to fail, rot out become loose or split etc while under pressure.

Now on a compressor design the consideration is heat exchange, cooling so a thin wall has an advantage over a heavy wall add to the fact that the cooling coils are coiled short in length and well supported and not mile long straight lines of thin easy to bend tube with a rocket engine blasting out the end ripping back in your face.
Consider therefore a thicker wall tube and good quality pipe supports and secure brackets at least every 3 foot on the horizontal and 4 foot on the vertical on a straight line. And further brackets before or after a 90 degree bend. Consider Stauff type clamps only and not those cheap single screw penny clips from China.
  1. You can bend using a good quality hand bender 1/4” 3/8” and 1/2” With 5/8” and 3/4” you will need a ratchet bender and for 1” and over its only suitable for a hydraulic bender or a radius die block bender.
  2. Swagelok make the very best hand benders used in the workshop. For site work use Parker PTB series as no one will steal them.
  3. Avoid fitting any pipe tube gauge or valve at face level. Simply aim lower but not that low if you catch my drift.
  4. Never use quarter turn valves with oxygen better yet never use quarter turn valve with any high pressure gas unless it's for emergency closing only due to adiabatic shock loading considerations and the subsequent fire you will eventually create.
 
You can make your own pretty easily with PMVs. They are only $79 each new from Bauer
I keep trying to wrap my head around how these auto-cascade arrangements using PMV's work, and failing...
 
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