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Fisher™ A11 High Performance Butterfly Valve
Key Features
- Choose from square, keyed, or splined shaft connections.
- The pressure-assisted seal design provides tight shutoff.
- Trim and bolting materials are available for applications involving sour liquids and gases.
- The valve body self-centers on the line flange bolts as a fast, accurate means of centering the valve in the pipeline.
- Seal retainer screws are located so there is no interference with the sealing function of either flat sheet or spiral-wound line flange gaskets.
- A feature of the valve design is that the torque necessary to open and close the valve is the same, regardless of the direction in which the differential pressure is applied.
- Interchangeability of all parts, including shafts and disks, simplifies service and reduces maintenance costs.