A11 | Fisher™ A11 High Performance Butterfly Valve | Fisher

Fisher™ A11 High Performance Butterfly Valve

The Fisher A11 valve is a reliable; high performance Butterfly valve for both throttling and on/off applications. Available in either a wafer or single-flange design; it maintains tight shutoff; and can be specified for a wide range of pressure and temperature conditions; including cryogenic applications.

• 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.