Fisher butterfly 8580
Fisher® 8580 rotary valve offers excellent throttling performance. An approximately linear flow characteristic provides precise throttling control. The 8580 valve offers high cycle life and rugged reliability.
(a) Valve body sizes ANSI: NPS 2", 3", 4", 6", 8", 10", 12" inch
Valve body sizes DIN: DN50, DN80, DN100, DN150, DN200, DN250, DN300 mm
(b) Pressure Classes ANSI: CL150 and 300 lbs
Pressure Classes DIN: PN10, PN16, PN25, PN40 bar
(c) Approximately linear flow characteristic
(d) Global Standards— The valve meets API, ASME, and EN standards
(e) PEEK/PTFE bearing as standard
(f) Spline-ended Shaft
(g) Improved shaft-disk pinning
(h) New Spring-Loaded Shaft
(i) Excellent Emissions 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. The seal of the ENVIRO-SEAL system can control emissions to below 100 ppm (parts per million).
(j) Sour Service Capability— Trim and bolting materials are available for applications involving sour liquids and gases. These constructions comply with NACE MR0175-2002, MR0103, and MR0175 / ISO 15156.
(k) Field-Reversible Valve Action
(l) Easy Installation
(m) Excellent Shutoff Regardless of Pressure Drop
(n) Long Seal Life
(o) Reliable Flange Gasketing Surface.
(p) Integral Shaft-to-Valve Body Bonding
(q) Powder paint as standard
(r) High Temperature Capability
(s) Shaft Retention
(t) Travel Indication