danorocks17
Well-Known Member
Has anyone had an issue using only Buna-N O-rings, instead of using silicone for the gas posts?
I use regular Buna-N o-rings for both posts. They work fine. Haven't had many issues as long as the QDs aren't being shifted to the side.
One more question on these o-rings. Does anyone know a part number for the replacement o-rings for universal poppets? I know that they can be replaced, I just can't find it anywhere what orings those would be.
One more question on these o-rings. Does anyone know a part number for the replacement o-rings for universal poppets? I know that they can be replaced, I just can't find it anywhere what orings those would be.
McMaster is awesome in terms of shipping, but they are pretty pricey. I just ordered everything except the -417 (the lid o-ring) from O-ring warehouse for much cheaper. I still have to get the -417 from Mcmaster, but it's always good to save a little.
They were the silicone ones. $0.03 apiece for all except the post o-rings (-111), which were $0.05. They have a minimum of $5 per item, so I ended up with quite a few (167) of each, but still cheaper than McMaster for more of them. They also have a pretty slick order interface. My apologies too; I totally sound like I work for their marketing department.
Has anyone ever used these for the lid? They are only 3/16s cross section, but they are quad seals. Maybe they will be better for a leaky keg.
http://www.mcmaster.com/#90025K551
or these yellow ones? I read they may be softer and larger.
http://www.rcbequip.com/item5101.ctlg
Those specs match the #112 o-rings found here: #112 Silicone - 9396K25... 3/32 thick
1/2 id
11/16 od
.....
....
2-111 orings have an ID of .424 and an OD .630
This is for a gland of .463 and a bore of .625
2-112 orings have an ID of .487 and an OD of .693
This is for a gland of .525 and a bore of .687
My measuring of pin lock posts and connectors shows a gland of .485 and a bore of .655. As you can see this is between the 2-111 and the 2-112.
.....
I was looking at Mcmaster-Carr metric o-ring sizes and this one appears to be in between the #111 & #112.
2.5mm x 17mm : ID of 0.472 / OD of 0.669 / thickness of 0.098
In Silicone: 2.5mmx17mm
Could these be a better option for pinlock kegs?
thanks, I fixed the linkI think the oring you are looking at is the 12mm (.472 ID) x 2.5mm (.098 W)....
Thanks for the analysis. Does this mean that, as designed, the pin lock connector has non-standard compression or non-standard oring requirements? Given its frequency of use, maybe it was designed with low compression for ease of connection? Of course the low compression results in a higher rate of poor seals and requires added attention to connector alignment...... This looks close but the width is a concern. I did some calculations. Normally static oring seals are set up to compress about 18%. From my measuring the correct pin lock oring setup has a 16% compression. A bit lower then standard but still okay. The metric oring you mention has a reduced width and the compress ends up being about 12%. What I think could work is go to a 3mm oring with a reduced ID. The 10mm (ID) x 3mm (W) will have to be stretched over the post, but this would also reduce the width to be close to the standard. This results in about a 20% compression. Just an idea I may get around to trying.
FYI the 2-111 only has a 11% compression. That is why some people have had issues with leaks.
Thanks for the analysis. Does this mean that, as designed, the pin lock connector has non-standard compression or non-standard oring requirements? Given its frequency of use, maybe it was designed with low compression for ease of connection? Of course the low compression results in a higher rate of poor seals and requires added attention to connector alignment.
Anyone have any idea what the part number for this oring might be? It is the oversized one for leaky kegs.
http://www.williamsbrewing.com/KEG-LID-SEALING-O-RING-P58C78.aspx
Spartan1979 said:Does any one have an answer for this? I have a keg that leaks around the lid. I can't get it toseal.
Does any one have an answer for this? I have a keg that leaks around the lid. I can't get it toseal.
A leaky lid is usually due to a bent lid or keg rim. A flat surface and a hammer can straighten a lid. Keg rims are tricky but a hammer, a flat punch, and some patience can fix most leaks.
Well said.A leaky lid is usually due to a bent lid or keg rim. A flat surface and a hammer can straighten a lid. Keg rims are tricky but a hammer, a flat punch, and some patience can fix most leaks.
Well said.
I wrote some information about this a bunch of years ago. It might help someone with lid sealing problems.
Getting Your Keg Lid To Seal
P-J
Anyone have any idea what the part number for this oring might be? It is the oversized one for leaky kegs.
http://www.williamsbrewing.com/KEG-LID-SEALING-O-RING-P58C78.aspx
I decided to rearrange this post to be a little more straight forward with the information. The bulk of the info provided here was copied/edited/paraphrased from a Dec 2010 post on Homebrew Finds - so a big thanks to Chris (724b). Rather than copying the blog post's text, I have pared down to just the relevant details no so this is easier to read at a glance. The links and numbers below are currently for ball lock kegs, but if you have the numbers/links for the o-rings for pin locks please let me know and I will add them to the list.
- Dip Tube O-rings $1.96/100 - 9452K172
- Dip Tube O-rings Quad Sealing $4.46/100 - 90025K368 (better seal, less force)
- Post O-rings Buna-N $2.15/100 - 9452K23 (liquid post)
- Post O-rings Silicone $10.71/100 - 9396K24 (gas post)
- Lid O-rings Buna-N $12.69/10 - 9452K218
- Lid O-rings Silicone $7.88/5 - 9396K926
- Internal Quick Disconnect O-rings Silicone $6.11/100 - 9396K18 (see notes)
Regarding Buna-N vs Silicone:
Most use Buna-N on the liquid posts because they are cheaper and a liquid leak will be immediately obvoius. Silicone is supposed to seal better, and is generally used for the gas posts. This also has the effect of color coding the posts as Buna-N is black and Silicone is red. Though the keg lid is generally sealing against gas coming out, most use the Buna-N for lid sealing without any problems.
Notes/Additional O-Rings:
I will list extra info and additional o-rings and part numbers here until I have enough to start reorganising it by keg type or similar.
- The o-ring listed for the Internal QD (9396K18) aren't exactly the same as the standard square sided o-ring that comes in quick disconnects, but the HBF author stated they work well for him and I have found this to be true as well.
- Dip Tube Silicone o-rings $9.44/100 - 9396K74 (thanks crazyworld)
- Sanke Keg o-ring $4.67/10 - 9396k215 (thanks dstar26t)
- barrooze reported that the standard post o-rings for ball locks appear to be a bit small in thickness for use on a pin lock post and he will try using the next thickness up (0.139").
Enter your email address to join: