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Fisher
™
8580 Rotary Valve
Contents
Introduction 1...................................
Scope of Manual 1............................
Description 1................................
Educational Services 2...........................
Specifications 2..............................
Installation
4....................................
Maintenance 8..................................
Packing Maintenance 8........................
Replacing the Seal Ring Assembly 12.............
Replacing the Disk, Shafts, or Bearings 13.........
Actuator Mounting 17.........................
Parts Ordering 20
................................
Parts Kits 20...................................
Parts List 21...................................
Figure 1. Fisher 8580 Valve with 2052 Actuator
and DVC6200 Digital Valve Controller
LUGGED STYLE
W9498-3
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for the Fisher 8580 valve, DN50
through DN300 or NPS 2 through NPS 12 (figure 1). Refer to separate instruction manuals for information covering the
power on‐off actuator and accessories.
Do not install, operate, or maintain an 8580 valve without being fully trained and qualified in valve,
actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property
damage, it is important to carefully read, understand, and follow all the contents of this manual,
including all safety cautions and warnings. If you have any questions about these instructions, contact
your Emerson sales office
before proceeding.
Description
The 8580 rotary valve offers excellent throttling and quarter-turn performance. An approximately linear flow
characteristic provides precise throttling control. The 8580 valve offers high cycle life and rugged reliability.
Retainer clips provide for versatility to mount and align the same wafer style valve body in different piping
configurations (ASME and EN ratings). The valve body is compatible with PN 10 through PN 40, CL150, and CL300
ratings. Face‐to‐face dimensions meet EN 558, API 609, and MSS‐SP68 standards.
The 8580 rotary valve features an eccentrically‐mounted, double-offset disk with either soft or metal seal, providing
capability for enhanced shutoff. The interchangeable sealing technology allows for the same valve body to accept both
soft and metal seals.
Instruction Manual
D103300X012
8580 Valve
April 2020
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