Introduction 2-5 Safety Information 6-7 1.0 Preservation And Storage 8 1.1 Storage 8 1.2 Periodic maintenance during storage 8 1.3 Environmental considerations 8 2.0 Installation 9-13 2.1 Valve preparation 9 2.2 Valve installation 9-10 2.3 Maintenance prior to flushing 10 2.4 Flushing the pipeline 10-11 2.5 Maintenance post flushing 12 2.6 Commissioning 13 3.0 Operation 13-15 3.1 Pressure Test 14 3.2 Optional - “Differential Thermal Relief” - Bleed System 14-15 4.0 Removal From Line 16 5.0 Gearbox Removal 16 6.0 Valve Disassembly 17 7.0 Maintenance 18-19 EXPANDING SEAL PLUG VALVE DOUBLE BLOCK & BLEED API6D - TWIN SERIES I N D E X Australian Pipeline Valve - Installation, Operation and Maintenance Manual 1  © Copyright Australian Pipeline Valve 1990 - 2018 Edition Catalogues, photos, brochures and technical publications are the exclusive property of Australian Pipeline Valve. Any unauthorised reproduction in total or in part, shall result in prosecution. Products and data sheets in this publication are subject to change at anytime without notice. Australian Pipeline Valve reserves the right to carry out amendments to products and materials.