O Ring sizes

[mainedvr]

Hi,

I am building a tool kit and was wondering what size orings are standard. I realize that some gear manurfactures will have something different that other gear manufactures. But I am sure some are fairly standard.

I do not have any exploded views or part list of my gear and want to make sure I have proper size orings for, my DIN, hoses, lights, ect....

Thanks for any direct sizes or information on where to find the sizes.

 

[randy88k5]

A chart on this page shows the popular o-ring sizes and their uses.

Oxygen Compatible O-Rings, Lubricant and Tools - Dive Gear Express

 

[GrandpaScuba]

Not specific sizes, your local dive shop can get you the right sizes. But, you should have some high pressure port o-rings, some low pressure port o-rings. If you are using DIN, then a couple DIN o-rings. If you are diving with a US yoke, then you should have some tank valve o-rings. These come in 2 sizes, a thicker size and a thin size. The thick ones are found less often these days. Most newer tank valves use the thin ones. That covers most of the o-rings that you might change in the field. Some people also have tank neck o-rings. But for most people, you really should take the tank to a shop if this o-ring leaks. You might consider, though, keeping a battery/o-ring kit for your dive computer and an 0-ring kit for your dive light.

 

[spectrum]

For your tank connection (yoke / DIN) I like to keep a few right on the valve cap lanyard. Quite a few times they kept things moving for me or a buddy when a ring was lost or failed at the dive site.

That Dive Rite Express chart is a good reference for the fundamentals.

Pete