The standard cylinder connections shown in the table below convert CGA
cylinder valve outlets to 1/8” NPT male, or 1/4” NPT male, or 1/4” face seal male.
Caution: When changing the gas service of a regulator or gas system by
changing the cylinder connections, the regulator or system must be thoroughly
cleaned prior to the introduction of the new gas. It is strongly recommended that
you consult with your supplier before attempting any conversion to confirm that
the intended conversion can indeed be performed safely, or that such equipment
be returned to your supplier for conversion.