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Connect CGA-580 nitrogen / beer-gas cylinder valve to Nitrogen / beer-gas regulator

How to join 0.965"-14 NGO RH and CGA-580 inlet, 5/16" barb out, and what stops it leaking.

End ACGA-580 nitrogen / beer-gas cylinder valve (0.965"-14 NGO RH)Seals directlyEnd BNitrogen / beer-gas regulator (CGA-580 inlet, 5/16" barb out)

These connect directly. CGA-580 nitrogen / beer-gas cylinder valve mates with Nitrogen / beer-gas regulator without an adapter.

The two ends

End A
CGA-580 nitrogen / beer-gas cylinder valve (0.965"-14 NGO RH)
End B
Nitrogen / beer-gas regulator (CGA-580 inlet, 5/16" barb out)
A seals on
nylon or fibre washer inside the nut against the valve outlet
B seals on
washer in the CGA-580 nut on the tank; barb under a worm clamp or flare on its face at the outlet
Part needed
none, direct fit

A nitrogen or beer-gas regulator already carries a CGA-580 inlet nut, so it screws straight onto a CGA-580 nitrogen, argon or beer-gas cylinder. The nut seals on a captive washer against the tank outlet, no adapter between them.

The CGA-580 nut seals on its washer, not on tape, and it is right hand like CGA-320, unlike some fuel gases. A hiss at the inlet is almost always a missing or hardened washer, so keep a spare fibre washer rather than overtightening the nut.

Related connections

Sources: CONCOA CGA fitting reference chart (CGA-320.825-14 NGO RH, CGA-580.965-14 NGO RH, CGA-590 LH) · MoreBeer / Taprite dual-gauge nitrogen (beer-gas / argon) regulator: CGA-580 inlet, 5/16 barb outlet · HowdyBrewer dual-gauge nitrogen / argon regulator (CGA-580 cylinder inlet)