Product Description

The triple eccentric wafer type butterfly valve metal & soft seated by AIRA can be utilized for bi-directional flow control without any leakage and very low fugitive emissions. It is also an ideal valve for cryogenic applications (down to -196° C), steam-based applications (up to 550°C), throttling and positive isolation applications. This valve features a triple offset sealing system that enables smooth and friction-free movement of disc together with body seat and disc seal.  The third offset therefore prevents rubbing. In order to achieve a snug fit, the seal ring on the disc energizes the seat on the body. Grafoil layers are sandwiched between metal laminations to construct a laminar seal. The compressive forces when generated decide where the resiliency of the seal flexes or energizes. It also enables slight body deformations caused by temperature fluctuations without jamming. It ensures a uniform wedging effect and zero leakage.

Special Feature of Triple Eccentric Wafer Type Butterfly Valve:

• It comes laminated and metal seat design
• Long lasting body seat and disc seal
• Bearing protectors
• High reliability
• Laminated disc seal
• Blow - out proof seat
• Blow - out proof stem
• Sealing mechanism with a cone-shaped design and triple eccentrics
• A disc seal and a body seat have low friction 
• The seal is designed to expand under heat 
• Suitable for cryogenic and high temperature applications 
• It has a life cycle of up to 50,000 cycles without jamming or packing adjustment 
• Test for fire safety in accordance with API 607
• A single-piece shaft that is durable and robust 
• Seats are tightly fastened with no leaks 
• No cavity
• Laminated resilient disc seal to 1022°F / 550°C)
• Bubble-tight seal without rubbing or galling 
• Thermal shaft expansion does not cause binding with a self-centering disc