US Divers K Valve Oring Question

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BigRed96

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Good Evening All, I rebuilding a vintage US Divers K Valve and have stubbled upon an issue. There is a plug on the right hand side of the valve and I’m trying to figure out the oring size for it. I have included a pic of a valve that’s the same as mine.
AAD6AA87-D8AF-4C6B-B7E9-101709272469.jpeg
 

couv

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Assuming it's not the blow out plug, I believe that plug was for an SPG. Remove the plug and check the size. If 3/8" use a -011. If 7/16" use a -012. As there is high pressure differential there, suggest a duro 85-90.
 

BigRed96

Contributor
Messages
251
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144
Location
New Richmond, Oh
# of dives
100 - 199
Assuming it's not the blow out plug, I believe that plug was for an SPG. Remove the plug and check the size. If 3/8" use a -011. If 7/16" use a -012. As there is high pressure differential there, suggest a duro 85-90.
Thank You Sir. The blow out plug is on the back side. I replaced it with a multi-directional burst disk plug.
 
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