Australian Pipeline Valve - Installation, Operation and Maintenance Manual 7 SIDE ENTRY 2P TRUNNION BALL VALVES API6D STANDARD - FS9000 SERIES d- At the end of installation lock the valve full open in order to avoid any movement of the ball before flushing the pipeline. e- Valves will operate at any angle horizontally or vertically, although it is recommended you install valves in a vertical position with stem pointing upwards for ease of operation, inspection and accessibility. f- Ball valves are usually bi-directional, and therefore may be installed in either direction. In some cases, ball valves such as ‘metal to metal’ and low temperature valves may be unidirectional, in which case the direction of flow will be indicated on the valve body. 2.3 MAINTENANCE PRIOR TO FLUSHING a- If the period between installation and flushing of the of the pipeline is longer than six months a preventative maintenance operation is suggested. • Lubricate the stem with fluid protective oil through the stem injector (if applicable). Do not grease lubricate seats as grease may attract debris and damage seats. • Remove valve from line and remove any debris and reflush. • Filters or strainers should be installed upstream of soft seated valve to prevent seat damage. 2.4 FLUSHING THE PIPELINE Flushing washes away all welding slag, dirt, sand, solids and debris collected in the pipelines during construction prior to turning the valve and potentially damaging the soft seat. Flushing, where deemed Note If the ball valve is equipped with a test connection port, make sure that it is fully closed before pressurising the valve. Local safety regulations must be complied with for transport to the place of installation. Make sure that the valves cannot tilt or slip in any way (see figure below).