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Fisher
™
461
Increased Outlet Angle Sweep-Flo Valve
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 1.................................
Specifications 2...............................
Educational Services 2.........................
Installation 2..................................
Maintenance 3.................................
Packing Lubrication 4..........................
Packing Maintenance 5.........................
Adding Packing Rings 5.....................
Replacing Packing 5........................
Replacing Trim 11.............................
Disassembly 11............................
Assembly 12..............................
Lapping Seating Surfaces 13....................
Parts Ordering 14...............................
Parts List 14...................................
Figure 1. Fisher 461 Valve with 657 Actuator
W9553-2
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for the Fisher 461 anti-coke valve.
Refer to separate manuals for instructions covering the actuator, positioner, and accessories.
Description
The 461 valve (figure 1) is a self-cleaning, increased-outlet, angle valve that is typically used in the chemical and
hydrocarbon industries where control of residual oils or other liquids with coking properties is necessary. The 461
features a venturi-type throat, which is useful in power plants or slurry services where high pressure drops and flashing
might exist.
Do not install, operate, or maintain a 461 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
or Local Business Partner before
proceeding.
Instruction Manual
D100714X012
461 Valve
June 2017
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