O-Rings for Oceanic Computers

[TravelDave]

I'm trying to find just O-rings for the following:

Oceanic VT 4.0/4.1 computer
Oceanic VT 4.0/4.1 Transmitter
Oceanic B.U.D. computer

I already have a bunch of spare batteries, so I'm trying to avoid buying the kids. Does anyone know the specs or model numbers for O-rings for these applications (and where they can be purchased)?

Thanks!

 

[diversteve]

I can't help with the o-ring specific details - you also need to know the material (or density) most likely - but once you have it you should be able to purchase them at https://www.grainger.com/ near you.

I get mine from a local hydraulic/pneumatic supplier - they have a box of all the normal sizes and let me buy individual o-rings for about .20 apiece.

 

[runsongas]

if it uses the 2450 battery, they are 026 orings iirc

 

[TravelDave]

Found this PDF on another post

http://www.scubaboard.com/community/attachments/computer-batt-o-ring-v1-5-pdf.220726/

They show the VT-3 as a 2-026 (assuming the VT 4 is the same, especially given the response from runsongas). I think the other element is Durometer of 70A. Based on that, I'm thinking this one will work:

M2x26 Buna-N O-Ring, 70A Durometer, Round, Black, Buna-N, 26 mm ID, 30 mm OD, 2 mm Width (Pack of 10): Amazon.com: Industrial & Scientific

Thoughts?

 

[TravelDave]

Or maybe this?

026 Buna O-Ring, 70A Durometer, Black, 1-1/4" ID, 1-3/8" OD, 1/16" Width (Pack of 25): O Ring Seals: Amazon.com: Industrial & Scientific

 

[diversteve]

According to this chart a -026 o-ring has an inside ID of 31.47mm +/- .028 so I'm not sure if that's the one.
Size Cross Reference I really don't know though, I haven't bought o-rings in almost a decade so forgot how to figure it out.

Buna-N is the right material for salt water though - it's all I ever bought when I was buying them.

 

[diversteve]

Or maybe this?

026 Buna O-Ring, 70A Durometer, Black, 1-1/4" ID, 1-3/8" OD, 1/16" Width (Pack of 25): O Ring Seals: Amazon.com: Industrial & Scientific

Seems to match up exactly with the chart I posted so that could be the one.

 

[TravelDave]

Seems to match up exactly with the chart I posted so that could be the one.

I ordered that one, so hopefully that's the case. If so, I'll have enough O-rings to last me a couple of lifetimes (though I still need to see what I need for the B.U.D.)

 

[runsongas]

you want the 026 size (2nd link) as that is the ASME sizing. the m2x26 is a metric oring and not the right one.

 

[TravelDave]

you want the 026 size (2nd link) as that is the ASME sizing. the m2x26 is a metric oring and not the right one.

Perfect! I ordered them today. Not completely sure what I'll do with 25 of them, but considering I spent less than $2, I'm not too concerned. Thanks!