Advanced metal sealing solution for Triple-Offset butterf ly valves Author: Laurent GUIMET | Engineering Team Leader - Jean-Jacques DARQUE | Key Account Manager Flow Control Company: Technetics Download Abstract Type of butterfly valves (DOBV vs. TOBV)Main sealing technologies for TOBVLamellar seal principleConcept weaknessesHow to reduce leak paths with lamellar seals?Design optimization:Lab test examples & results