Emerson Fisher POSI-SEAL A31A, Инструкция по эксплуатации

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Fisher
™
POSI‐SEAL
™
A31A Cryogenic High
Performance Butterfly Valve
Contents
Introduction 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjusting the Actuator Travel Stops or Travel 4 . . . . .
Valve Orientation 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparing for Installation 4 . . . . . . . . . . . . . . . . . . . . . .
Installing Wafer‐Style Valves 6 . . . . . . . . . . . . . . . . . . .
Installing Single‐Flange Valves 8 . . . . . . . . . . . . . . . . .
Maintenance 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Packing 9 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Valve from the Pipeline 10 . . . . . . . . . .
Removing/Installing the Seal Ring 11 . . . . . . . . . . . . .
NOVEX
t
Seal Installation 12 . . . . . . . . . . . . . . . .
Kel‐F and Kel‐F/aluminum Seal Installation 13 . .
Anti‐Blowout Protection, Packing,
Valve Shaft(s), Disk, and Bearing
Maintenance
15 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing a One‐Piece Shaft 18 . . . . . . . . . . . . . . .
Installing a Two‐Piece Shaft 19 . . . . . . . . . . . . . . .
Installing the Gasket Retainer 21 . . . . . . . . . . . . .
Parts Ordering 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1. Fisher A31A Cryogenic Valve with
1035 Actuator
W7451 / IL
Introduction
Scope of Manual
This instruction manual provides installation, maintenance, and parts ordering information for the POSI‐SEAL A31A
Cryogenic high‐performance butterfly valves (see figure 1). The Series C (3‐ through 6‐inch Class 150 & 300 and 8‐inch
Class 150) feature a cast one‐piece extension. The 8‐inch Class 300, and 10‐ through 24‐inch Class 150 & 300 designs
have a two‐piece extension. For information regarding actuators and accessories, refer to separate instruction
manuals.
Do not install, operate, or maintain an A31A Cryogenic 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 of the contents of this manual, includingall safety cautions and
warnings.
If you have any questions about these instructions, contact your Emerson sales office .
Instruction Manual
D500242X012
A31A Cryogenic-Rotary Valve
February 2019