Australian Pipeline Valve - Installation, Operation and Maintenance Manual
7
SIDE ENTRY 3P TRUNNION BALL VALVES API6D STANDARD - BVF100 SERIES
b- The end protectors must be removed only immediately before installation. If one of end is not
connected to the line for a period of longer than half a day the opened end shall be securely sealed
with plastic or wooden cover.
c- For butt weld type valves take care for the following: If brushing or grinding, seal valve conduit (bore)
to prevent damage. At the end of such operation clean accurately the conduit. The welding procedure
and post-weld treatment shall be performed taking into account the allowable maximum temperature
for seats and seals. The welding sequence shall be pre-planned in order to give an acceptable piping
load to the valve. Leave valve in full open position to reduce temperature transmission to soft seats. For
valves up to 80 NB (3”) use temperature measuring strips. Ensure temperature of body does not go
above 180
°
C.
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.
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).
