tripple offset butterfly valve have numerous advantages over other types of valves. They offer higher pressure ratings, smoother operation, and lower leakage rates. They can be used in high and low-temperature applications and are effective in fugitive emissions control. This type of valve also has a smaller overall diameter than traditional butterfly valves, which makes them easier to install and use.
A triple-offset design eliminates rubbing between the seat and seal ring through the flow path, reducing seat and seal wear and extending cycle life. This allows the valve to operate in applications that would be impossible for gate and ball valves. Triple-offset valves also have no cavities between sealing components, which minimizes the potential for debris to clog the mechanism and requires less frequent maintenance.
The Evolution of Triple Offset Butterfly Valves: Past, Present, and Future
The oblique disc and three concentric seals in a TOV create a more reliable seal than conventional butterfly valves, which rely on plastic deformation for sealing. This results in a much longer seat and stem life, and reduced friction during opening and closing. This translates to lower operating torque and a more resilient, stable performance in high-pressure drop process conditions.
The metal-to-metal seal enables these valves to handle a wide variety of temperatures, pressure levels, and fluid types. They are most commonly found in applications involving corrosive media such as acids, solvents, chemicals, gases and steam with pressure levels over 150 psi. The body seats are made from Stellite grade 21 or Duplex with a resilient metal seal ring to ensure maximum resistance to corrosion, fluid abrasion and general wear.