Installation, Operation & Maintenance Manual
2
Top-Transfer 2" Angle Valves A-720, A-721, A-721-B and A-724 Series
SECTION 1 | REGULATIONS AND SAFETY REQUIREMENTS ...........................................................................................3
1.1 Regulations ........................................................................................................................................................ 3
1.2
Safety Warnings and Precautions .................................................................................................................... 3
SECTION 2 | INTRODUCTION ...........................................................................................................................................4
2.1
Component Identification and Parts Listings ................................................................................................. 4
SECTION 3 | VALVE INSTALLATION.................................................................................................................................8
3.1
Installation and Required Tools ...................................................................................................................... 8
SECTION 4 | OPERATING PROCEDURE ..........................................................................................................................10
4.1
Opening the Valve ......................................................................................................................................... 10
SECTION 5 | VALVE QUALIFICATION ............................................................................................................................11
SECTION 6 | VALVE DISASSEMBLY ..............................................................................................................................15
SECTION 7 | VALVE REASSEMBLY AND TESTING PROCEDURES .................................................................................19
7.1
Cleaning ........................................................................................................................................................... 19
7.2
Reassembly Procedure .................................................................................................................................... 19
7.3
Testing Procedure ............................................................................................................................................ 25
7.4
Post-Test Procedures ....................................................................................................................................... 25
SECTION 8 | MAINTENANCE .........................................................................................................................................26
8.1
Prior to Maintenance Tasks Performed ........................................................................................................ 26
8.2
Leak Repair on a Mounted Valve .................................................................................................................. 26
