815W Pneumatic High-Performance Butterfly Valve adopts a double eccentric disc with a spherical sealing surface, paired with a single flexible lip-type sealing seat, suitable for applications requiring reliable sealing and excellent regulating characteristics. Due to the double eccentric disc design, the valve offers tight sealing performance and an extended service life. It can be used for quick shut-off or flow regulation.
The product is suitable for conveying liquids and gases (including steam) in various industrial pipelines. With special selection, it can also be used for specific media such as oxygen, high vacuum, sulfur-resistant, or corrosive media. The product is available with a fire-safe structure as an option.
Connection methods include wafer-type or lug-type single flange design for large pipe diameters and pipeline terminals.
Valve Series Design Type Pressure Rating Size (in) Applicable Temperature oC Body Material Adopted Standard Catalog Number
815 Series Wafer-type (W) Lug-type (L) 150 Class 2"～60"
830 Series Wafer-type (W) Lug-type (L) 300 Class 2"～60"
860 Series Wafer-type (W) Lug-type (L) 600 Class 2"～24"
Valve Features
Utilizes a single PTFE seat design, offering excellent elasticity and high reliability
● Lip-type sealing structure compensates for changes in temperature and pressure.
● Long service life with minimal maintenance required.
● Bubble-tight sealing achieved in both directions.
Eccentric shaft and eccentric disc design
● No contact between the seat and disc when opening or in intermediate positions.
● No wear points on the upper and lower parts of the seat.
● Low torque requirement, reducing demands on the operating mechanism.
Combines shut-off and control capabilities
● Excellent control characteristics.
● Flow characteristic curve changes proportionally.
● Wide regulation range.
● Maintains tight sealing even when used for control purposes.