Power Inflator O-ring sizes

[bigken462]

Was hoping someone may have a list of O-ring sizes for an old style Dive Rite power inflator handy. I have one that needs to be cleaned and serviced after it started leaking some.

I have the proper tools, just not sure on what size O-rings to look up.

Thanks,

Ken

 

[cool_hardware52]

Near the end of this video the required oring sizes are listed,

https://www.deepseasupply.com/templates/inflator.html

Tobin

 

[bigken462]

Should have checked here first before taking the pictures for the other thread. Thanks Tobin. I guess you got my e-mail by now. I got your tools and they worked like a charm. No safe a dive kit should be w/o them!!!

Everything I needed in one simple video. Awesome!

Kenny

 

[V&G]

do you know what duro should be used for each o-ring?

 

[Bubbletrubble]

do you know what duro should be used for each o-ring?

@V&G: For this kind of power inflater, I've used o-rings with a durometer ranging from 70 to 90.
I've only used EPDM and Viton o-rings for this application, but I'd be willing to bet that Buna-N works well, too.

Hope this helps...

 

[cool_hardware52]

@V&G: For this kind of power inflater, I've used o-rings with a durometer ranging from 70 to 90.
I've only used EPDM and Viton o-rings for this application, but I'd be willing to bet that Buna-N works well, too.

Hope this helps...

No need for EPDM or Viton, although they probably work fine. Nitrile (Buna N) is the most common.

I have used both 70 and 90 duro with similar results, although I now skew towards 90 duro for barrel oring in the cartridge valve. The rest of the orings are static (except the oral inflate) and it really doesn't seem to matter.

Tobin

 

[V&G]

2 cool_hardware52:
Talking about dure 90 you mead a pair of 006 o-rings on cartridge valve piston? Because cartridge valve barrel is static also, doesn't it?

By the way, looks like Scubapro TSS talking about duro 85 for all o-rings used in inflater.

 

[cool_hardware52]

2 cool_hardware52:
Talking about dure 90 you mead a pair of 006 o-rings on cartridge valve piston? Because cartridge valve barrel is static also, doesn't it?

The "barrel" is the moving portion of the cartridge valve.

Tobin

 

[V&G]

Thank you .
Looked the video about DSS power inflater servicing. They called it "Valve spool". But I think we are talking about the same thing.
So, do you propose to use duro 70 for static components and harder duro for dynamic parts?

 

[cool_hardware52]

Thank you .
Looked the video about DSS power inflater servicing. They called it "Valve spool". But I think we are talking about the same thing.
So, do you propose to use duro 70 for static components and harder duro for dynamic parts?

These inflators are very forgiving with respect to oring duro.

Given the spool or barrel orings have to slide past orifices which can "nibble" at the oring I suspect the harder ones will wear better.

In actual practice I usually rebuild my inflators when they get sticky, not because they are leaking.

Tobin