Commissioning, Startup, Operation & Shutdown
216 Series Twin-Screw Pump -
Installation, Operation & Maintenance Manual
51
NOTICE:
1. Risk of equipment damage due to dry operation. Immediately observe the pressure gauges.
If discharge pressure is not quickly attained, stop the driver immediately, reprime, and
attempt to restart the pump.
2. To avoid risk of equipment damage, observe the pump for vibration levels, bearing
temperature, and excessive noise. If normal levels are exceeded, shut down the pump and
resolve the issue.
On frame mounted units, ensure that the oil level is correct prior to starting pump. Close
coupled pumps do not have oil lubricated bearings.
Risk of equipment damage on pure or purge-oil mist-lubricated units. Remove the viewing port
plugs to verify that oil mist is flowing properly. Reinstall the plugs after confirming
1. Start the driver.
2. Immediately check the pressure gauge to ensure that the pump discharge pressure is
below the maximum design pressure stated on the nameplate.
3. If the pump exceeds the maximum design pressure, perform these steps
a. Stop the driver.
b. Determine the source of restriction in the discharge piping and remove it.
c. Restart the driver.
4. If the pump fails to produce flow, perform these steps:
a. Stop the driver.
b. Prime the pump again.
c. Restart the driver.
5. Monitor the pump while it is operating:
6. Check the pump for bearing temperature, excessive vibration, and noise.
7. If the pump exceeds normal levels, then shut down the pump immediately and correct the
problem. A pump can exceed normal levels for many reasons. Refer to the
Troubleshooting section for information about possible solutions.
8. Repeat steps 1 through 4 until the pump runs properly.
Pump operation precautions
General considerations
Check the unit for unusual noise or vibration. Any unusual vibration or change
in sound must be investigated as it may be the first sign of impending trouble.
With pumped fluid temperatures of up to 100°C (212°F), resulting bearing
temperatures up to 100°C (212°F) are considered normal. The stability of the
temperature rather than the number of degrees is the best indication of
