Flowserve GCX Series - Manual (Page 10)

10
3 Single Seal Piping and Operational Recommendations
3.1 Install an adequate seal flush system. The GCX requires a clean
cool environment for maximum seal life. With a clean cool product,
use a bypass flush from the pump discharge (Plan 11) or a bypass
flush to the pump suction (Plan 13). With clean hot products
use a bypass flush through a cooler (Plan 21). With abrasive
products or products that are incompatible with the seal, use a flush
from a clean external source (Plan 32). Consult your Flowserve
Representative for assistance with choosing the appropriate flush
system.
3.3 Taps in the gland are quench and drain ports used for fluid
quenching, Plan 62. If they are not used, they should be plugged
with pipe plugs.
3.4 Remove lock outs on pump and valves.
3.5 Do not start up the equipment dry to check motor rotation or for any
other reason. Open valves to flood pump with product fluid. Ensure
that the seal flush system is operating. Vent air from the casing of
the pump and the seal chamber before start-up.
3.6 Observe the start-up. If the seal runs hot or squeals, check the seal
flush system. Shut down the equipment immediately if the seal
becomes hot or squeals.
4 Operational Recommendations
4.1 Do not exceed corrosion limits. The GCX is designed to resist
corrosion by most chemicals. However, do not expose the GCX
materials of construction to products outside of their corrosion limits.
The GCX assembly drawing lists the materials of construction.
Consult your Flowserve Representative for chemical resistance
recommendations.
4.2 Do not exceed the recommended maximum pressure and speed
limits of 13.8 bar (200 psi) and of 3600 rpm.
4.3 Do not exceed the temperature limit of 204°C (400°F).
4.4 Do not start up or run the GCX dry. Process fluid must be in the
pump volute at all times during seal operation.
For special problems encountered during installation, contact your nearest
Flowserve Sales and Service Representative or Authorized Distributor.