O-Ring Sizing

Pat Coughlan · 26th August 2007, 16:01

Anyone got the size for the two inspo hose o-rings between the hose and t-piece, save me having to measure them

Cheers Pat

***jradomski*** · 27th August 2007, 00:47

Quote: (Originally Posted by Pat Coughlan)

Anyone got the size for the two inspo hose o-rings between the hose and t-piece, save me having to measure them

Cheers Pat

#027 for the normal hose ends..
#029 for hose ends at mouthpiece
#129 t-piece

Tino de Rijk · 27th August 2007, 13:21

Joe,

what is the size system you're using...? Each country seems to have its own O-ring standard size indication scheme (e.g. the British have their BS size standards, as used in the APD diagrams. Apeks uses them also).
Do you also have them in ordinary metric sizes, i.e. diameter of ribbon (body) in mm (or inch) & diameter or overall ring in mm (or inch)?

ciao,

Tino.

Quote: (Originally Posted by jradomski)

#027 for the normal hose ends..
#029 for hose ends at mouthpiece
#129 t-piece

***jradomski*** · 27th August 2007, 13:39

Quote: (Originally Posted by Tino de Rijk)

Joe,

what is the size system you're using...? Each country seems to have its own O-ring standard size indication scheme (e.g. the British have their BS size standards, as used in the APD diagrams. Apeks uses them also).
Do you also have them in ordinary metric sizes, i.e. diameter of ribbon (body) in mm (or inch) & diameter or overall ring in mm (or inch)?

ciao,

Tino.

The BS number on the APD diagrams are using the as568a dash number (you can just drop the bs from the ap numbers).. Almost all the APD o-rings are based on imperial sizes.. The only one I can think of thats not a standard size is an oring on the hose end swivel for the handset (BS 805n70)..

most of the orings are nitrile n70 (shore a) the only ones that arent are in the inflators and they are viton V75 (shore a).. For all practical reasons viton can be substituded for nitrile..

sometimes you will see the numbers preceeded by 2- as in 2-129..

in the 3 digits, parts that start with a 0 are a 0.070inch cross section. ones that strt with a 1 are .103inch cross section, those that start with a 2 have a .139 inch cross section, and tjose with a 3 have a .210inch cross section.

Pat Coughlan · 27th August 2007, 18:03

Joe
Thanks for the info - o-rings purchased

Cheers Pat

Tino de Rijk · 28th August 2007, 12:36

Thanks, Joe.
I got a bit confused by the different names they use in the various countries as reference, but found out that also in Holland they refer to the AS568A-system sizes if you dig deep enough.
As a small service back I found a list on the Internet with all the O-ring sizes, both in metric as well as imperial.
I stripped all the mumbo-jumbo out, and converted it to PDF.
See attachment.

ciao,

Tino.

Quote: (Originally Posted by jradomski)

The BS number on the APD diagrams are using the as568a dash number (you can just drop the bs from the ap numbers).. Almost all the APD o-rings are based on imperial sizes.. The only one I can think of thats not a standard size is an oring on the hose end swivel for the handset (BS 805n70)..

most of the orings are nitrile n70 (shore a) the only ones that arent are in the inflators and they are viton V75 (shore a).. For all practical reasons viton can be substituded for nitrile..

sometimes you will see the numbers preceeded by 2- as in 2-129..

in the 3 digits, parts that start with a 0 are a 0.070inch cross section. ones that strt with a 1 are .103inch cross section, those that start with a 2 have a .139 inch cross section, and tjose with a 3 have a .210inch cross section.

Pat Coughlan · 28th August 2007, 17:48

Tino A useful reference

Cheers pat

26th August 2007, 16:01	#1 (permalink)
Pat Coughlan New Member Current Rebreather/s: Other Rebreather/s: Inspiration Classic Join Date: Apr 2005 Location: Ireland- County Mayo Posts: 87	O-Ring Sizing Anyone got the size for the two inspo hose o-rings between the hose and t-piece, save me having to measure them Cheers Pat
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27th August 2007, 00:47	#2 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,115	Re: O-Ring Sizing Quote: (Originally Posted by Pat Coughlan) Anyone got the size for the two inspo hose o-rings between the hose and t-piece, save me having to measure them Cheers Pat #027 for the normal hose ends.. #029 for hose ends at mouthpiece #129 t-piece __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.
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27th August 2007, 13:21	#3 (permalink)
Tino de Rijk Old, maybe one day wise Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Evolution Join Date: Mar 2006 Location: Amsterdam Posts: 375	Re: O-Ring Sizing Joe, what is the size system you're using...? Each country seems to have its own O-ring standard size indication scheme (e.g. the British have their BS size standards, as used in the APD diagrams. Apeks uses them also). Do you also have them in ordinary metric sizes, i.e. diameter of ribbon (body) in mm (or inch) & diameter or overall ring in mm (or inch)? ciao, Tino. Quote: (Originally Posted by jradomski) #027 for the normal hose ends.. #029 for hose ends at mouthpiece #129 t-piece
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27th August 2007, 13:39	#4 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,115	Re: O-Ring Sizing Quote: (Originally Posted by Tino de Rijk) Joe, what is the size system you're using...? Each country seems to have its own O-ring standard size indication scheme (e.g. the British have their BS size standards, as used in the APD diagrams. Apeks uses them also). Do you also have them in ordinary metric sizes, i.e. diameter of ribbon (body) in mm (or inch) & diameter or overall ring in mm (or inch)? ciao, Tino. The BS number on the APD diagrams are using the as568a dash number (you can just drop the bs from the ap numbers).. Almost all the APD o-rings are based on imperial sizes.. The only one I can think of thats not a standard size is an oring on the hose end swivel for the handset (BS 805n70).. most of the orings are nitrile n70 (shore a) the only ones that arent are in the inflators and they are viton V75 (shore a).. For all practical reasons viton can be substituded for nitrile.. sometimes you will see the numbers preceeded by 2- as in 2-129.. in the 3 digits, parts that start with a 0 are a 0.070inch cross section. ones that strt with a 1 are .103inch cross section, those that start with a 2 have a .139 inch cross section, and tjose with a 3 have a .210inch cross section. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated. Last edited by jradomski : 27th August 2007 at 13:44.
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27th August 2007, 18:03	#5 (permalink)
Pat Coughlan New Member Current Rebreather/s: Other Rebreather/s: Inspiration Classic Join Date: Apr 2005 Location: Ireland- County Mayo Posts: 87	Re: O-Ring Sizing Joe Thanks for the info - o-rings purchased Cheers Pat
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28th August 2007, 17:48	#7 (permalink)
Pat Coughlan New Member Current Rebreather/s: Other Rebreather/s: Inspiration Classic Join Date: Apr 2005 Location: Ireland- County Mayo Posts: 87	Re: O-Ring Sizing Tino A useful reference Cheers pat
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