Goulds Pumps 3311 - IOM - Manual (Page 18)

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6.5 Starting procedure
- Check everything using the check list of sub-section
6.4.
- Switch on the motor.
- Check the pressure gauges at the pressure measuring
points.
- Open the discharge side regulating valve to adjust the
duty point of the pump.
CAUTION
• A fluid quantity of a few cm³ per hour will typically
leave the mechanical seal in the form of vapor, mist or
droplets. If there should be a considerable increase in
the leakage rate after the start-up phase, stop the pump
and check the mechanical seal.
• If a stuffing box is installed, the leakage rate after
start-up should be higher than during operation. After
about 1 hour, tighten the gland nuts gradually until
there is a slight drop leakage.
6.6 Particular information
The following parameters should be monitored during
operation:
- power consumption of the motor
- smoothness of pump operation (no vibration)
- bearing temperature
- leakage
6.7 Stopping procedure
- Close the discharge side regulating valve.
- Switch off the motor.
- Once the pump is at rest, close the shut-off valves of
the feed line and cooling line (if installed).
CAUTION
• If there is danger of freezing, the pump should be
drained down.
• Please note that there will always be some residual
liquid even if the pump is emptied in vertical position.
• Ensure that the pump does not contain any hazardous
substances when it is dismantled to be returned to the
manufacturer's factory.
• Ensure that during prolonged inactivity the pump is
operated for about five minutes every 1 to 3 months.
Follow the instructions under 6.5.