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8590 High Performance Butterfly Valve

8590 High Performance Butterfly Valve

BKW Instruments

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Fisher 8590 High Performance Butterfly Valve Applications Cryogenic Chemical and petrochemical Power and heating Pulp and paper Special Features The valve body self-center s on the line flange bolts as a fast, accurate means of centring 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 The pressure-assisted seal design provides tight shutoff and permits the use of smaller, less expensive actuators

BKW Instruments's own words, read from their page.

Buy from BKW INSTRUMENTS LIMITEDBKW INSTRUMENTS LIMITED is a UK retailer, not the maker. Price seen 2026-09-26. Not an affiliate link, we earn nothing from it.

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.