ITW Dynatec DYNAMELT D15 Series, Technical Documentation Manual

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ITW Dynatec Page 5
Appendix Pumps Rev.10.15
Heating, Cooling During Operation
If the pump is to be operated outside of room temperature 10°C (50°F) – 45°C (113°F),
care must be taken to ensure the process temperature is met and maintained prior to and
during operation. Monitor the pump temperature and ensure the target temperature has
been met and maintained. Allow ample time for the pump to adjust and stabilize. Ensure
any temperature changes occur gently, thoroughly and evenly (including the seal
arrangement).
Protect the pump from thermal shocks of greater than 28°C (50°F). Rapid temperature
changes must be avoided.
Shutdown
The pump will need to be purged of the process fluid during shutdown. Use of a purging
liquid (an inert, lubricating liquid which is safe to the pump and personnel,) is
recommended, rather than simply attempting to drain the process fluid from the pump.
Run the pump slowly during the purging process in order to ensure no damage occurs.
Separate the coupling components, connecting the pump shaft to the gearbox or motor,
and turn the pump by hand, or with a wrench, when completing the purging and draining.
If no purging liquid is available, and the pump will be run in order to facilitate draining, be
cautious to complete the operation in less than 1 minute.
If the pump is to be stored, or if it will sit for a long period without operation or protection,
apply rust preventative oil to all internal and external surfaces.
Restarts
On restart, where the product fluid has hardened and solidified in the pump during the
shutdown, the fluid must be softened and made completely liquid again prior to restarting
the pump. If the product fluid can be softened by heating, preheat the pump and allow the
product to completely melt.
If the product fluid cannot be softened easily, or if the hardening of the product fluid is not
reversible, the pump must be cleaned prior to restarting.
WARNING
•
Take care the product has not changed properties.
•
Ensure the fluid is still capable of providing lubrication to the pump internal
components.
•
Restart slowly and gradually.
•
During preheat; do not let polymer sit inside the pump more than 5 hours, due to the
risk of breakdown and conversion of the polymer. Breakdown or conversion would
result in unsatisfactory lubrication of the pump bearings at start-up and cause pump
failure.
Airborne Noise
•
Under normal operating conditions, the airborne noise level will be less than or equal
to 70 dB.
•
If airborne noise levels above 70 dB are noted, the pump is not operating under
normal conditions or component failure is imminent. Contact your ITW Dynatec
representative for assistance.