8590 | Fisher™ 8590 High Performance Butterfly Valve | Fisher

Fisher™ 8590 High Performance Butterfly Valve

The Fisher 8590 high performance Butterfly valve maintains tight shutoff and can be specified for a wide range of pressure and temperature conditions. The 8590 valve is available in a lugged body design. A splined shaft can combine with a variety of spring-and-diaphragm or pneumatic piston actuators and a square or keyed shaft can combine with a variety of handlevers; handwheels; or pneumatic piston diaphragm actuators.

• This valve will meet your actuator needs with a choice of splined; square; or keyed shaft connections.
• The pressure-assisted seal design provides tight shutoff and permits the use of smaller; less expensive actuators in applications requiring full ASME B16.34 shutoff capabilities.
• The optional ENVIRO-SEAL™ packing systems are designed with very smooth shaft surfaces and live-loading to provide improved sealing; guiding; and loading force transmission.
• 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.
• The torque necessary to open and close the valves is the same; regardless of the direction in which the differential pressure is applied.