The Pelagian Way

silent running · 5th September 2007, 05:52

Quote: (Originally Posted by Drmike)

I think your idea makes good sense- I like the idea of using a tiny amount of dil to do a very quick validation with the press of a button. The faster, easier the validation and the less dil it uses - the more sense it makes..hmmm I feel a mod coming on. Of course this would only work easily on a mCCR.

I think it would also work on an MK or a Prism with the electronics turned off, which is how I was taught to dil flush. I like the Pelagian quick cell validation too, I wonder if it's possible to mod the Prism the same way...

Rebreatherlab · 5th September 2007, 08:45

Quote: (Originally Posted by Drmike)

Thanks for you reply Andy,

I built the BOB for one purpose (To do the deep cave Sra Keow - we had planned on max depth 280m) so was aware that flushing at depth to validate cells would quickly kill off my dil supply. It was a relaively untested bit of kit* I was using an unfamilar ppo2 display and an unfamilar (untested) VR3 display so wanted the option to validate at depth at intervals (assuming Id bailed to it) if displays started to show variance or not (10 hours is a long time to be breathing the wrong ppo2). On the RAT I am using familar componenst and well tested (plus not taking it to 280m) so just thought Id make do with normal dil flush method.

I think your idea makes good sense- I like the idea of using a tiny amount of dil to do a very quick validation with the press of a button. The faster, easier the validation and the less dil it uses - the more sense it makes..hmmm I feel a mod coming on. Of course this would only work easily on a mCCR - but I do like it.

did we stop being friends?

* Which is why I had full OC bail out as well

.

No no. I just felt there was some humor emerging in this long debate!

Andy

Drmike · 5th September 2007, 09:02

Quote: (Originally Posted by Rebreatherlab)

No no. I just felt there was some humor emerging in this long debate!

Andy

Im an engineer - we dont do humour

btw Thanks for your offer of help with the Swagelok stuff. Did you see the combined needle valve/manual inject valve I ended up making?. MMMMmmm...shinny

Has ports to allow off board O2 and/or Dil to be plugged into the manual add at same time

**RichClark** · 5th September 2007, 09:57

Quote: (Originally Posted by Drmike)

Im an engineer - we dont do humour

. Did you see the combined needle valve/manual inject valve I ended up making?. MMMMmmm...shinny

Has ports to allow off board O2 and/or Dil to be plugged into the manual add at same time

I've been think about something like that for a while, but don't have the tooling or contacts to get it done. So when are you going to make more

steevke · 5th September 2007, 11:56

Quote: (Originally Posted by Drmike)

Did you see the combined needle valve/manual inject valve I ended up making?

Mike, how easy was it to turn off the unused parts (the T actually) from the needle valve? I wanted to build something similar a year ago but was affraid I'd wreck the valve cutting off the T.

Thanks

Steven

***Beanie*** · 5th September 2007, 12:15

Quote: (Originally Posted by Drmike)

Im an engineer - we dont do humour

btw Thanks for your offer of help with the Swagelok stuff. Did you see the combined needle valve/manual inject valve I ended up making?. MMMMmmm...shinny

Has ports to allow off board O2 and/or Dil to be plugged into the manual add at same time

white socks and sandals surely that's a joke right

nice work BTW

Drmike · 5th September 2007, 12:27

Quote: (Originally Posted by steevke)

Mike, how easy was it to turn off the unused parts (the T actually) from the needle valve? I wanted to build something similar a year ago but was affraid I'd wreck the valve cutting off the T.

Thanks

Steven

Thats not what I did - I machined the holes in the block and screwed in the needle part (in other words the T and needle hole is in the block)

steevke · 5th September 2007, 13:08

Quote: (Originally Posted by Drmike)

Thats not what I did - I machined the holes in the block and screwed in the needle part (in other words the T and needle hole is in the block)

I think we misunderstand eachother - the piece with the red circle around it must be removed or you can't screw in the needle part. Can you just remove the bottom part from the needle valve or do you need to cut it off in a lathe?

Thanks

Steven

Drmike · 5th September 2007, 13:57

Quote: (Originally Posted by steevke)

I think we misunderstand eachother - the piece with the red circle around it must be removed or you can't screw in the needle part. Can you just remove the bottom part from the needle valve or do you need to cut it off in a lathe?

Thanks

Steven

The swagelok needle valve comes in 2 parts.
the top part circled in yellow is unscrewed from the bottom T piece part. The top part contains the needle (the bottom T piece contains the needle hole and the outlet hole. I then reproduce the needle hole and outlet hole into the chrome plated brass block and screw in the top (needle) piece

Rebreatherlab · 5th September 2007, 14:41

That looks great Mike!
it is pretty much what I tried to do long time ago, but didn't as I thought the 1 degree taper would be too tricky. How did you solve the channels inside the block? It looks like you just drilled a hole from short to short side. have you noticed any different CV charachteristis compared to the SL body? I sure looks tidier than my solution.

Hats off for Dr Mike!

Andy

Quote: (Originally Posted by Drmike)

Im an engineer - we dont do humour

btw Thanks for your offer of help with the Swagelok stuff. Did you see the combined needle valve/manual inject valve I ended up making?. MMMMmmm...shinny

Has ports to allow off board O2 and/or Dil to be plugged into the manual add at same time

5th September 2007, 05:52	#51 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,836	Re: The Pelagian Way Quote: (Originally Posted by Drmike) I think your idea makes good sense- I like the idea of using a tiny amount of dil to do a very quick validation with the press of a button. The faster, easier the validation and the less dil it uses - the more sense it makes..hmmm I feel a mod coming on. Of course this would only work easily on a mCCR. I think it would also work on an MK or a Prism with the electronics turned off, which is how I was taught to dil flush. I like the Pelagian quick cell validation too, I wonder if it's possible to mod the Prism the same way...
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5th September 2007, 08:45	#52 (permalink)
Rebreatherlab RebreatherWorld Sponsor Current Rebreather/s: Pelagian Other Rebreather/s: Not Bought Yet Classic Kiss Pelagian Join Date: Sep 2005 Location: Thailand Posts: 202	Re: The Pelagian Way Quote: (Originally Posted by Drmike) Thanks for you reply Andy, I built the BOB for one purpose (To do the deep cave Sra Keow - we had planned on max depth 280m) so was aware that flushing at depth to validate cells would quickly kill off my dil supply. It was a relaively untested bit of kit* I was using an unfamilar ppo2 display and an unfamilar (untested) VR3 display so wanted the option to validate at depth at intervals (assuming Id bailed to it) if displays started to show variance or not (10 hours is a long time to be breathing the wrong ppo2). On the RAT I am using familar componenst and well tested (plus not taking it to 280m) so just thought Id make do with normal dil flush method. I think your idea makes good sense- I like the idea of using a tiny amount of dil to do a very quick validation with the press of a button. The faster, easier the validation and the less dil it uses - the more sense it makes..hmmm I feel a mod coming on. Of course this would only work easily on a mCCR - but I do like it. did we stop being friends? * Which is why I had full OC bail out as well . No no. I just felt there was some humor emerging in this long debate! Andy __________________ www.rebreatherlab.com
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5th September 2007, 09:57	#54 (permalink)
RichClark Classic KISS No. 226 Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Mar 2005 Location: Hove, UK Posts: 779	Re: The Pelagian Way Quote: (Originally Posted by Drmike) Im an engineer - we dont do humour . Did you see the combined needle valve/manual inject valve I ended up making?. MMMMmmm...shinny Has ports to allow off board O2 and/or Dil to be plugged into the manual add at same time I've been think about something like that for a while, but don't have the tooling or contacts to get it done. So when are you going to make more __________________ The more I learn about women, the more I want to go diving... just don't tell my wife I said that To taste something a little different, try http://www.thechillikitchen.co.uk Last edited by RichClark : 5th September 2007 at 10:04.
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5th September 2007, 11:56	#55 (permalink)
steevke Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Sport Kiss Join Date: Jul 2005 Location: Belgium Posts: 311	Re: The Pelagian Way Quote: (Originally Posted by Drmike) Did you see the combined needle valve/manual inject valve I ended up making? Mike, how easy was it to turn off the unused parts (the T actually) from the needle valve? I wanted to build something similar a year ago but was affraid I'd wreck the valve cutting off the T. Thanks Steven
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5th September 2007, 12:15	#56 (permalink)
*Beanie* give a man an inch....... Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,247	Re: The Pelagian Way Quote: (Originally Posted by Drmike) Im an engineer - we dont do humour btw Thanks for your offer of help with the Swagelok stuff. Did you see the combined needle valve/manual inject valve I ended up making?. MMMMmmm...shinny Has ports to allow off board O2 and/or Dil to be plugged into the manual add at same time white socks and sandals surely that's a joke right nice work BTW __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk 0871 242 7808
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5th September 2007, 12:27	#57 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,300	Re: The Pelagian Way Quote: (Originally Posted by steevke) Mike, how easy was it to turn off the unused parts (the T actually) from the needle valve? I wanted to build something similar a year ago but was affraid I'd wreck the valve cutting off the T. Thanks Steven Thats not what I did - I machined the holes in the block and screwed in the needle part (in other words the T and needle hole is in the block) __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
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5th September 2007, 14:41	#60 (permalink)
Rebreatherlab RebreatherWorld Sponsor Current Rebreather/s: Pelagian Other Rebreather/s: Not Bought Yet Classic Kiss Pelagian Join Date: Sep 2005 Location: Thailand Posts: 202	Re: The Pelagian Way That looks great Mike! it is pretty much what I tried to do long time ago, but didn't as I thought the 1 degree taper would be too tricky. How did you solve the channels inside the block? It looks like you just drilled a hole from short to short side. have you noticed any different CV charachteristis compared to the SL body? I sure looks tidier than my solution. Hats off for Dr Mike! Andy Quote: (Originally Posted by Drmike) Im an engineer - we dont do humour btw Thanks for your offer of help with the Swagelok stuff. Did you see the combined needle valve/manual inject valve I ended up making?. MMMMmmm...shinny Has ports to allow off board O2 and/or Dil to be plugged into the manual add at same time __________________ www.rebreatherlab.com
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