Rebreather-80 style counterlung bellows

rchrds · 4th February 2005, 19:58

Ok- this post may be just going nowhere- but does anyone know of a source for the Rebreather-80 counterlung bellows?

J

(is anybody out there?)

***schford*** · 5th February 2005, 21:45

hi :-)

I dont but wanted to say welcome! sorry for the lack of audiance I have not officially launched sit eyet as wanted to finish content off :-) but hi *waves*

plazma · 9th February 2005, 17:23

Quote: (Originally Posted by rchrds)

Ok- this post may be just going nowhere- but does anyone know of a source for the Rebreather-80 counterlung bellows?

J

http://www.hema-gmbh.com/

I haven't seen these bellows but they do have a wide range models, sizes and materials.

***Beanie*** · 9th February 2005, 19:08

might help you

http://www.therebreathersite.nl/Boot...rebreather.htm

londonsean69 · 24th February 2005, 12:27

Try Michael and Arno at www.stde.ch , they make the EDO-04 which is an RB80 clone (mine arrived today). They might be able to sort you out with what you need. Failing that, check out mcmaster carr

***EBT*** · 24th February 2005, 19:49

Quote: (Originally Posted by rchrds)

Ok- this post may be just going nowhere- but does anyone know of a source for the Rebreather-80 counterlung bellows?

J

(is anybody out there?)

Mcmaster Carr

montyg · 25th February 2005, 15:25

I have asked this question on the NWDesigns list some time ago and I was told that the McMaster-Carr bellowses are not rigid enough - they collapse / go out-of-round and this, in turn causes friction. Rumour has it that the Halcyon's bellows is teflon coated, rigid enough and has an elasticity that helps with static lung loading. We have thought about inserting stainless rings to keep it from collapsing. I was referred to http://www.moellerbalg.de/ by the people on the NWDesigns list. HTH

rchrds · 26th February 2005, 03:14

Quote: (Originally Posted by montyg)

I have asked this question on the NWDesigns list some time ago and I was told that the McMaster-Carr bellowses are not rigid enough - they collapse / go out-of-round and this, in turn causes friction. Rumour has it that the Halcyon's bellows is teflon coated, rigid enough and has an elasticity that helps with static lung loading. We have thought about inserting stainless rings to keep it from collapsing. I was referred to http://www.moellerbalg.de/ by the people on the NWDesigns list. HTH

Okay- so some information regarding my early results- I have two types of bellows - both the thin polyethylene (McMC 9741K59) and the thicker rubber/jersey coat types (www.gortite.com)- the PE is extremely thin and would probably breath very well, but succumbed to design failure in my unit, based on dimensions- I could not get ID and OD close enough to either fit the unit or develop the correct ratio. The thicker rubber/jersey bellows had exactly the right dimensions that I needed and at first seemed a little too stiff- but after hanging them out in the unit (full extension) they stretched enough to allow an acceptable WOB. (This is entirely based on out of the water with no scrubber material.) It does not collapse quite as much as I might have hoped- particularly the inner bellow, but the only design issue is the extension of the injection push rods, which is not an issue at all. The unit is very close to being in the water- (couple of weeks depending on work) and i will report more as it comes along.

Thanks for all the links folks.

J

4th February 2005, 19:58	#1 (permalink)
rchrds New Member Current Rebreather/s: Other CCR RB80 / Clone Home Build Other Rebreather/s: Other CCR RB80 / Clone Home Build Join Date: Feb 2005 Location: Clarksville, TN Posts: 42	Rebreather-80 style counterlung bellows Ok- this post may be just going nowhere- but does anyone know of a source for the Rebreather-80 counterlung bellows? J (is anybody out there?)
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5th February 2005, 21:45	#2 (permalink)
*schford* RBW Founder Current Rebreather/s: Megalodon Sport Kiss Other Rebreather/s: Join Date: Jan 2005 Location: UK Posts: 3,564	elo hi :-) I dont but wanted to say welcome! sorry for the lack of audiance I have not officially launched sit eyet as wanted to finish content off :-) but hi waves __________________ Bailout and Kit Management account for Murphy's Law The only bad question is one you did not ask and later wish you had. Use of RBW is subject to the Rebreather World Terms & Conditions of Use
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9th February 2005, 17:23	#3 (permalink)
plazma Just add ice & water Current Rebreather/s: Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2005 Location: Oulu, Finland Posts: 154	Quote: (Originally Posted by rchrds) Ok- this post may be just going nowhere- but does anyone know of a source for the Rebreather-80 counterlung bellows? J http://www.hema-gmbh.com/ I haven't seen these bellows but they do have a wide range models, sizes and materials.
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9th February 2005, 19:08	#4 (permalink)
*Beanie* Gallery Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,311	err.. might help you http://www.therebreathersite.nl/Boot...rebreather.htm __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk
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24th February 2005, 12:27	#5 (permalink)
londonsean69 RBW Writer Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Feb 2005 Location: Sunny Lanzaote Posts: 49	Try Michael and Arno at www.stde.ch , they make the EDO-04 which is an RB80 clone (mine arrived today). They might be able to sort you out with what you need. Failing that, check out mcmaster carr
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24th February 2005, 19:49	#6 (permalink)
*EBT* Apprentice Luddite Current Rebreather/s: Classic Kiss Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: UK, Brighton Posts: 2,111	Quote: (Originally Posted by rchrds) Ok- this post may be just going nowhere- but does anyone know of a source for the Rebreather-80 counterlung bellows? J (is anybody out there?) Mcmaster Carr __________________ Eagles May Soar, but weasels don't get sucked into jet engines! RBW Terms of service
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25th February 2005, 15:25	#7 (permalink)
montyg Monty Guest Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Feb 2007 Location: Cape Town, South Africa Posts: 242	I have asked this question on the NWDesigns list some time ago and I was told that the McMaster-Carr bellowses are not rigid enough - they collapse / go out-of-round and this, in turn causes friction. Rumour has it that the Halcyon's bellows is teflon coated, rigid enough and has an elasticity that helps with static lung loading. We have thought about inserting stainless rings to keep it from collapsing. I was referred to http://www.moellerbalg.de/ by the people on the NWDesigns list. HTH
(Online)

26th February 2005, 03:14	#8 (permalink)
rchrds New Member Current Rebreather/s: Other CCR RB80 / Clone Home Build Other Rebreather/s: Other CCR RB80 / Clone Home Build Join Date: Feb 2005 Location: Clarksville, TN Posts: 42	Quote: (Originally Posted by montyg) I have asked this question on the NWDesigns list some time ago and I was told that the McMaster-Carr bellowses are not rigid enough - they collapse / go out-of-round and this, in turn causes friction. Rumour has it that the Halcyon's bellows is teflon coated, rigid enough and has an elasticity that helps with static lung loading. We have thought about inserting stainless rings to keep it from collapsing. I was referred to http://www.moellerbalg.de/ by the people on the NWDesigns list. HTH Okay- so some information regarding my early results- I have two types of bellows - both the thin polyethylene (McMC 9741K59) and the thicker rubber/jersey coat types (www.gortite.com)- the PE is extremely thin and would probably breath very well, but succumbed to design failure in my unit, based on dimensions- I could not get ID and OD close enough to either fit the unit or develop the correct ratio. The thicker rubber/jersey bellows had exactly the right dimensions that I needed and at first seemed a little too stiff- but after hanging them out in the unit (full extension) they stretched enough to allow an acceptable WOB. (This is entirely based on out of the water with no scrubber material.) It does not collapse quite as much as I might have hoped- particularly the inner bellow, but the only design issue is the extension of the injection push rods, which is not an issue at all. The unit is very close to being in the water- (couple of weeks depending on work) and i will report more as it comes along. Thanks for all the links folks. J
(Offline)

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