Flowserve Circpac HP - Manual (Page 6)

5.3 Size piping system for required flow rates. Minimize restrictions and
determine total pressure drop(s) through piping system to ensure
adequate seal pressure.
5.4 Unless otherwise specified, dirty process gas must be separated from
the inner ring to prevent excessive wear or erosion. For example, an
inner ring purge with at least 0.2 - 0.3 bard (3-5 psid) will prevent dirty
process from contaminating the rings. Purge and barrier gases must
be clean to less than 4 micron (10 mmm) particles.
5.5 During commissioning and before operation, all supply lines should
be disconnected and blown out to ensure they are clean and free
from any moisture, solids or debris.
6 Operational Recommendations
6.1 The pressure and temperature in the seal cavity or gas control system
must not exceed the recommended maximum seal limits. The shaft
speed must also not exceed seal limits. Optimum seal/control system
performance is achieved when the equipment is operated at the
conditions for which the seal was designed. Consult your Flowserve
representative if operating conditions change.
6.2 Barrier pressure(s) and purge pressure(s) should be energized prior
to starting the equipment and prior to starting the lube oil pump.
Likewise, do not remove pressure until the equipment has been fully
isolated, depressurized, and vented and the post lube has shut down.
6.3 For seals using external cooling and/or an external flush, start cooling
and/or flush prior to seal start-up.
6.4 Use a barrier/purge gas that is compatible with the product and all
seal materials of construction. Also consider environmental effects of
barrier/purge gas selection.
6.5 This seal is designed to resist corrosion by the product(s) listed on the
assembly drawing. Do not expose the seal materials to product other
than those shown on the assembly drawing. The seal assembly
drawing lists the materials of construction. Consult your Flowserve
representative when in doubt or when using the seal for another
application.
6.6 Start up equipment in accordance with normal operating procedures
unless specifically requested otherwise by Flowserve. If the
equipment is not operating properly (e.g. seals and/or bearings
running hot, heavy vibration, pressure reversals, contamination, etc.),
shut down the equipment and investigate the cause. Depending on
the significance of such events, Flowserve should be consulted for
seal advice.
6