Product Bulletin 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 or double flanged body design. A splined shaft can combine with a variety of spring-and- diaphragm or pneumatic piston actuators. A square or keyed shaft can combine with a variety of handlevers, handwheels, or pneumatic piston diaphragm actuators. These combinations help make the 8590 valve a reliable, high-performance butterfly valve for both throttling and on-off applications in the process industries. The 8590 valve can be supplied with one of several dynamic seals (figure 1) that can be used in a variety of demanding applications. With the appropriate seal selection and materials of construction, the pressure-assisted seal helps provide excellent shutoff against the full ASME class pressure range for the 8590 valve. Lugged Style Fisher 8590 Valve Shaft Versatility— This valve will meet your actuator needs with a choice of splined, square, or keyed shaft connections. Excellent Shutoff Integrity—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. X1610 Excellent Emissions Capabilities— The optional ENVIRO-SEALt packing systems are designed with very smooth shaft surfaces and live-loading to provide improved sealing, guiding, and loading force transmission. The seal of the ENVIRO-SEAL system can control emissions to below 100 ppm (parts per million). Double Flanged Style Fisher 8590 Valve Sour Service Capability— Trim and bolting materials are available for applications involving sour liquids and gases. These constructions comply with NACE MR0175-2002, MR0175-2003, MR0103, and MR0175 / ISO

Product Bulletin 51.6:8590 March 2021 ■ Fire Safe Construction — The 8590 valve has been fire tested per API 607, 6th edition with the Phoenix III seal. Standard construction requires 316 stainless steel chrome plated disk, graphite packing, metal bearings and S17400 H1025 SST or S20910 SST shaft. For information on fire tested valves, consult Fire-Tested Status of Fisher Rotary Valves Bulletin 59.3:025 (D103907X012). ■ Reliable Flange Gasketing Surface—Seal retainer screws are located so there is no interference with the sealing function of either flat sheet or spiral wound line flange gaskets....

Product Bulletin Table 2. Materials (Other Valve Components) COMPONENT Anti-Blowout Ring (NPS 3-8 only) Seal Ring Metal: S21800 Phoenix III: S20910/ETFE HPS: S21800 nitrided PEEK, S31600 Nitrided, R30006 (Alloy 6) PTFE/carbon-filled PTFE (standard), graphite die-molded ribbon, ENVIRO-SEAL PTFE packing, ENVIRO-SEAL graphite packing Table of Contents Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Standard Seal Configurations . . . . . . . . . . . . . . . . . . . 4 Installation...

Product Bulletin Figure 1. Available Seal Configurations ANTI-EXTRUSION RING 3 BACK-UP RING BACK-UP RING RETAINING RING SEAL RING RETAINING RING VALVE DISK HIGH PRESSURE AT SHUTOFF 2 SEAL RING VALVE DISK SOFT SEAL WITH BACK-UP O-RING RESILIENT INSERT HIGH PRESSURE AT SHUTOFF 2 SEAL RING BODY RETAINING RING RETAINING RING SEAL RING VALVE DISK HIGH PRESSURE AT SHUTOFF 1 METAL SEAL VALVE DISK HIGH PRESSURE AT SHUTOFF 1 Notes: This unidirectional seal must be installed so that the retaining ring is downstream from the high pressure side of the valve at shutoff, as shown. 1 2 For this bidirectional...

Product Bulletin Figure 2. 8590, NPS 3 to 8, Valve Body Assembly SEAL RETAINER VALVE BODY SEAL RING DRIVE SHAFT Figure 3. 8590, NPS 10 to 24, Valve Body Assembly SEAL RETAINER VALVE BODY SEAL RING DRIVE SHAFT BEARING

Product Bulletin51.6:8590 March 2021 Table 3. Material Temperature Ranges 1. The maximum temperature for a standard design of the 8590 valve is 538°C (1000°F). Contact your Emerson sales office for use in higher temperature applications. 2. For use with soft seal only.

Product Bulletin Figure 4. Anti-Blowout Protection NPS 3 THROUGH 8 WITH ANTI-BLOWOUT RING NPS 10 THROUGH 24 WITH STEPPED SHAFT

Product Bulletin 51.6:8590 March 2021 Pressure drop limits of any given valve are based on valve body, and trim material limits. To find the appropriate pressure drop limitation, choose the desired valve size and temperature range. Then search table 4 for body limitations and table 5 for trim limitations. Information on limits for CW2M, M35-2, and other alloy constructions can be obtained by contacting your Emerson sales office. The lowest number from the tables is the appropriate limit. The tables for both trim and body limits must be consulted. Table 4. Maximum Allowable Shutoff Pressure Drops...

Product Bulletin51.6:8590 March 2021 Table 5. Maximum Allowable Shutoff Pressure Drops based on Trim(1) Note: Do not exceed the ASME pressure/temperature ratings of the valve or mating flanges. 1. Trim ratings based on S17400 H1025 shaft. For other shaft materials,please contact factory. 2. The temperature limit of S17400 H1025 shaft material is 427°C (800°F). For higher temperatures another shaft material option must be selected.

Product Bulletin51.6:8590 March 2021 Table 6. Single Flange Dimensions and Weights 1. This is the nominal valve shaft diameter to be used when selecting Fisher actuators. 2. Threaded hole per ASME B1.1.

Product Bulletin51.6:8590 March 2021 Table 7. Double Flange Dimensions and Weights

Product Bulletin51.6:8590 March 2021 Table 8. Dimensions, Optional Square Shaft and Mounting Bracket (ISO 5211)

Product Bulletin Figure 7. 8590 Valve Assembly with Square Shaft and Mounting Bracket (also see table 8) Table 9. Dimensions, Optional Keyed Shaft Valve Size, NPS

Product Bulletin Figure 9. Dimensions for Fisher 8590 NPS 14 to 24 Valve with Keyed Shaft (also see table 9)