Commissioning, Startup, Operation & Shutdown
TT Twin-Screw Pump -
Installation, Operation & Maintenance Manual
51
will identify the connections that need to be made and the type/quantity of liquid that must be
supplied.
How to prime the pump with the suction supply above the
pump
1. Slowly open the suction isolation valve.
2. Open the air vents on the suction and discharge piping, the casing, the seal chamber,
and the seal piping, until all air is vented and only the pumped fluid flows out. Note that
the air vents provided varies with the configuration of the product. Refer to the pump GA
or outline drawing for specific vent locations.
3. Close the air vents.
Start the pump
WARNING:
Risk of equipment damage, seal failure and breach of containment. Ensure all flush and
cooling systems are operating correctly prior to starting pump.
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.
