Fighting fugitive emissions from valves

How to completely remove stem’s fugitive emissions from part turn valves (ball valves and butterfly valves) i.e. Zero Emission and zero Risk of seal’s friction wear in operation ?

Answer : encapsulate the stem.

That means hermetically sealing the area around the stem using only static seals or welded parts, but use a solution which allows to mechanically operate the stem through !

Now the technical patented solution …

PCT – WO2017032948-PAMPH-394 (3)