Question Help need to ID a Spirotek Tank Valve Oring Size

[Tim1966]

Hi Fellow Members

Do need help in identifying the oring used in this valve (It uses a EPDM oring instead of copper washer to seal, but not the common 014 o'ring)
The one I am looking for is ITEM 15 Part #SVSP15.

It has a very similar diameter compare to a 113 o'ring, but obviously the cross section is smaller than a 113.

Thank you for your help.

 

[Tanks A Lot]

This may be a duplicate, but for completeness sake:

I'm not familiar with Scubairs valves, but most valve manufacturers try not to reinvent the wheel and stick to used dimensions. A vast majority use a BS1806-015 O-Ring for the packing nut and either a 17mm, 18mm or 19mm spanner fits them. This would track with your statement.

It has a very similar diameter compare to a 113 o'ring, but obviously the cross section is smaller than a 113.

A BS1806-113 O-Ring would have the dimensions of 2.62mm x 13.94mm. A BS1806-015 O-Ring has dimensions of 1.78mm x 14.00mm. Even if that BS1806-015 is not a perfect fit, you likely get away with using it.

There are oddballs out there, like:

Rotarex: ISO3601-A0160 - 1.80mm x 16.00mm (This is mostly used on big packing nuts that a 21mm spanner fits onto.)

Some Coltri Subs: ISO3601-A0200 - 1.8mm x 20.00mm (This is only used on Coltri valve that have an exceptionally large rim. Others either take a copper washer, or a BS1806-015 O-Ring.

MDE, which since has been sold to Cavagna, and used to produce for many more, e.g. Genesis: The BS1806-015 fits OK'ish, but if memory serves right a BS1806-016 is a better fit. I may misremember this, so take it with a grain of salt.

XS-Scuba I believe uses a different size as well, although somehow my notes on it got lost...


Point being, the vast majority uses a BS1806-015 or a metric size very close to it. You will likely have success using it.