Connections; Interconnecting Piping - Flowserve 682R User Instructions

682R Reservoir API 682 Compliant Reservoirs

6.4.2 Connections

6.4.2.1.682R Reservoir in a buffer/barrier plan
When the 682R Reservoir is used in a buffer/barrier plan
(plan 52, 53), the top connection shall be connected to
the buffer/barrier outlet connection of the mechanical seal,
while the bottom flange shall be connected to the buffer/
barrier inlet connection of the mechanical seal.

6.4.3 Interconnecting piping

The flow of fluid through the 682R Reservoir is either
generated by:
• A pumping device, included in the seal design
• A circulation pump
• Thermosyphoning by natural convection
The interconnecting piping between the 682R Reservoir
and the main equipment must be correctly fitted;
otherwise the flow of the fluid through the 682R Reservoir
will be restricted and have a negative impact on the
performance.
Pay attention to the following points:
• Minimize the number of restrictions (for example, limit
the number of elbow/tee fittings).
• Unless otherwise specified, the pipe size should be
0.75 in. and schedule shall be the same as the system
piping.
• The pipes must be clean and free of burrs.
• The total pipe length and number of bends shall be
kept to a minimum.
• Use smooth, large radius bends; do not use elbows,
tees, etc.
• Pipe runs should be sloped continuously up or down
to allow for adequate circulation, proper venting and
draining.
• Make sure that the loop, including seal flange, does
not include vapor traps. When vapor traps cannot be
avoided, a proper venting solution shall be added.
• For threaded connections, do not use Teflon tape but
an anaerobic thread sealant.
• Leak testing is recommended after assembly. Refer to
end user specifications or procedures.
SSIOM000743-00 (EN/AQ) November 2022 Flowserve.com 17