Which Valve Manufacturers have been qualified in accordance with Shell SPE 77/312 Fugitive emissions specification?  And for which valves have they been qualified?

77/312 is still under consideration as far as i can understand, it requires the manufacturers to undertake approval and type testing to emissions standards, it is similar to the new ISO standards, as far as the big players are concerned, Exxon/BP both are going with a version of the ISA standard requiring type and production testing

I have a list of approved vendors if you require.

Metso Automation is the first valve manufacturer to have obtained fugitive emission type approval for its control valves in accordance with Shell