A-520/A-522/A-522A, Rev. 3.0
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Table of Contents
1 Regulations and Safety Requirements ........................................................................................... 3
Regulations ............................................................................................................................ 3
Safety Warnings and Precautions........................................................................................... 3
2 Introduction .................................................................................................................................... 4
Component Identification and Parts Listings ........................................................................... 4
Steam-Jacket Configurations ................................................................................................ 10
3 Valve Installation .......................................................................................................................... 12
Installation Procedure and Required Tools ........................................................................... 12
Leak Inspection .................................................................................................................... 14
Valve Operation Notes and Precautions ............................................................................... 14
4 Valve Qualification ....................................................................................................................... 15
Valve Disassembly and Required Tools ............................................................................... 15
Component Inspection .......................................................................................................... 18
Special Inspection Considerations ........................................................................................ 19
Valve Assembly and Testing Requirements ......................................................................... 20
Valve Assembly and Testing Procedure ............................................................................... 20
5 Routine Maintenance ................................................................................................................... 27
Leak Checking in the Field ................................................................................................... 27
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