The triple offset design of Vanessa valve completely eliminates any rubbing action of the sealing elements during the 90 degrees of rotation, positioning Vanessa as the ultimate process valve. This triple offset valve, also known in the industry as a triple eccentric or triple offset butterfly valve, represents an important step forward compared to traditional process valves, such as gate, ball, globe, and plug valves. Although the Vanessa brand shares the same cone-to-cone principle with a globe valve, sealing is performed by applying quarter-turn rotation instead.
The Vanessa triple offset valve was the first to provide bidirectional zero leakage* performance, creating a new industry category using a technology not previously available with other quarter-turn valves. There are now over 300,000 Vanessa valves operating around the world.
Emerson's engineering expertise, state-of-the-art technology, and manufacturing capabilities ensure we continue to provide the most reliable triple offset valves across a wide range of applications for our customers worldwide.
*Triple offset valves are also known in the industry as triple eccentric or triple offset butterfly valves. Zero Leakage means no visible leakage when tested at high pressure with water and low pressure with air according to existing international standards.