O rings vs loctite on cocker barbs?

[SR_matt]

I feel like I have seen this talked about before but am coming up dry with searches on google.

Does anyone use o rings on barbs for the pneumatics or is the general consensus just to loctite them to seal them up?

If using o rings what are the right sizes/duro/material for it?

On paper o rings seem like they are a simpler and more easily serviceable choice but at the same time it may be looking for a solution to a problem that doesn’t exist.

[DarkApollo]

I just use loctite. Never had a barb leak unlike with the orings

[superman]

loctite is the way to go.

[Drcemento]

use a blue Loctite or Loctite 545 which is a thread sealant so you can get it off again without trouble.

[Toestr]

Smart Parts/GOG used a #10-32 barb with an oring for the VASA on the Vibe/SP1/eNMEy variants. I think it had a groove cut out in the barb for the oring (which had a smaller cross section than any standard Imperial oring) and a recessed sealing surface on the VASA. Not viable for something like a cocker 3 way where the barbs would be way too close together.

[Trbo323]

Bob long uses.... Well they are more like washers over o rings. But hey, they work

I've used both loc tight and Teflon tape (separately, not at the same time)

The tape is a little harder to get in place but has less of a risk of shearing the barb when trying to remove it.

Even still, you stand a better chance of shearing the barbs on install over removal

Both work. Choose what you want. I wouldn't want to add an o ring, that will mean less thread engagement and there's already not much

Sent from my motorola edge 5G UW (2021) using Tapatalk

[RuleOfSines]

Unless it is milled with an o-ring recess, loctite or the expensive flat seals like Clippard uses (11761-5-PKG (clippard.com)). An o-ring on a surface that isn't milled with a groove will typically just squeeze out. I just loctite everything, do note that if you haven't used it much, you should wait for it to cure before airing the marker up again.

[Magmoormaster]

You guys loctite your barbs?!? No wonder they keep breaking when I try to pull them off.

you don’t need to loctite them. Unless the threads are in rough shape, they’ll usually seal just by tightening them down.