Table Of Contents - GE Baker Hughes 2900-40 Series Maintenance Manual

Table of Contents

I. Product Safety Sign and Label System ..........................................................................................................................................................................7
II. Safety Alerts ..............................................................................................................................................................................................................................8
III. Safety Notice .......................................................................................................................................................................................................................... 10
IV. Warranty Information ........................................................................................................................................................................................................ 11
V. Terminology for Pilot Operated Safety Relief Valves ............................................................................................................................................ 12
VI. Handling and Storage ......................................................................................................................................................................................................... 13
VII. Pre-Installation and Installation Instructions .......................................................................................................................................................... 14
VIII. Introduction ......................................................................................................................................................................................................................... 15
A. General Introduction ................................................................................................................................................................................................. 15
B. Main Valve Introduction ........................................................................................................................................................................................... 15
C. Pilot Valve Introduction ............................................................................................................................................................................................ 15
IX. Consolidated 2900-40 Series Safety Relief Valves ........................................................................................................................................ 16
A. 2900-40 Main Valve (Metal Seat)......................................................................................................................................................................... 16
B. 2900-40 Main Valve (Soft Seat) ............................................................................................................................................................................ 17
C. 39PV Pilot Valve ........................................................................................................................................................................................................... 18
X. Operating Principles ....................................................................................................................................................................................................... 19
A. PV Valve Closed (Normal Position) ..................................................................................................................................................................... 19
B. PV Valve Open (Relieving Position) ..................................................................................................................................................................... 20
XI. General Planning for Maintenance ............................................................................................................................................................................... 21
XII. Recommended Installation Practices ................................................................................................................................................................... 21
A. Mounting Position ...................................................................................................................................................................................................... 21
B. Inlet Piping ..................................................................................................................................................................................................................... 22
C. Outlet Piping ................................................................................................................................................................................................................. 22
D. Remote Sensing ........................................................................................................................................................................................................... 23
E. Freeze Protection ........................................................................................................................................................................................................ 23
XIII. Disassembly of the 2900-40 POSRV ....................................................................................................................................................................... 25
A. Removal of the Pilot Valve from the Main Valve ........................................................................................................................................... 25
B. Disassembly of the Main Valve ............................................................................................................................................................................. 25
C. Cleaning .......................................................................................................................................................................................................................... 29
XIV. Maintenance Instructions ............................................................................................................................................................................................ 30
A. General Maintenance Information ...................................................................................................................................................................... 30
B. O-Ring Seat .................................................................................................................................................................................................................... 30
C. Lapping Nozzle Seats (Metal Seat - Non-O-Ring Styles) ........................................................................................................................... 30
D. Lapped Nozzle Seat Widths ................................................................................................................................................................................... 32
E. Lapping Disc Seats ..................................................................................................................................................................................................... 32
F. Precautions and Hints for Lapping Seats ......................................................................................................................................................... 34
G. Reconditioning of Laps ............................................................................................................................................................................................. 34
H. Re-Machining Nozzle Seats .................................................................................................................................................................................... 34
I. Re-Machining the Disc Seat ................................................................................................................................................................................... 35
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