Fisherr A41 High Performance Butterfly Valve
Contents
Introduction 1...............................................................
Scope of Manual 1.................................................
Description 1.........................................................
Specifications
2....................................................
Educational Services 2
...........................................
Installation 5
................................................................
Valve Orientation 6...............................................
Maintenance 9
.............................................................
Packing Maintenance 12........................................
Seal Ring Maintenance for NPS 3 through 12 13
.....
Seal Ring Maintenance for NPS 2 19.......................
Disc, Drive Shaft and Bearing Maintenance for
NPS 3 through 12
20.........................................
Disc, Drive Shaft and Bearing Maintenance for
NPS 2
24.............................................................
Actuator Mounting
26...........................................
Parts Ordering 27
.........................................................
Retrofit Kits for ENVIRO-SEALt Packing 27
............
Repair Kits for ENVIRO-SEAL Packing 28
..................
Parts List 28
...............................................................
Figure 1. Fisher A41 Valve
W9269
Introduction
Scope of Manual
This instruction manual includes installation, maintenance, and parts information for Fisher A41 high performance
butterfly valves (figure 1). Refer to separate instruction manuals for information covering the power on-off actuator
and accessories.
Do not install, operate, or maintain A41 valves 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 Process Management sales office before
proceeding.
Description
The A41 high performance butterfly valves have eccentrically mounted discs to reduce wear and reduce torque
requirements. The valve includes filled-PTFE or graphite packing rings that electrically bond the shaft to the valve
body. This valve has a Double D drive shaft end, and soft or metal seal rings for use in a wide variety of applications.
Instruction Manual
A41 Valve
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