Goulds Pumps VIT - IOM - Manual (Page 55)

Consult the applicable manufacturer instructions for detailed information for the prime mover (electric
motor, engine, or steam turbine), coupling, drive shaft, gear-head, or mechanical seal.
1. Confirm that you have completed these procedures:
a) Connected the driver to a power supply.
b) Verified that the driver rotates counterclockwise when viewed from above.
c) Checked the alignment between the pump and driver.
d) Adjusted the impeller.
e) Attached the mechanical-seal lock collar to the shaft.
2. Verify that the mechanical seal is properly lubricated and that all piping to the seal is connected.
3. Verify that all cooling, heating, and flushing lines are operating and regulated.
4. Verify that all connections to the driver and starting device match the wiring diagram.
5. Verify that the voltage, phase, and frequency on the motor nameplate agree with the line current.
6. Rotate the shaft manually to make sure that the impellers are not binding.
7. Verify that the driver bearings are properly lubricated and check the oil level in the housing.
8. Verify that the auxiliary seal components are properly vented.
9. Inspect the discharge-piping connection and pressure gauges for proper operation.
10. For the enclosed lineshaft construction, turn on the oil drip or water flush for a minimum of five minutes.
11. For oil-lubricated lineshafts, set the sight feed dripper for the number of drops per minute as directed
in this table:
Lineshaft size (OD) Drops per minute per 100 ft. (39 m) of shaft
¾ to 1 in. (19 mm to 25 mm) 8
1 3 /
16
to 1 15 /
16
in. (30 mm to 49 mm) 16
2 3 /
16
in. and larger (55 mm and larger) 20
Pump priming
CAUTION:
• The pump must be properly vented through the discharge head connections. This is important for
liquids with suction pressures close to their vapor pressures. Vent piping must continuously rise back
to the source so that liquid cannot collect in the vent line.
• Vary the capacity with the regulating valve in the discharge line. Never throttle the flow from the
suction side. This action can result in decreased performance, unexpected heat generation, and
equipment damage.
NOTICE:
Net positive suction head available (NPSH
A
) must always exceed NPSH required (NPSH
R
) as shown on
the published performance curve of the pump.
Requirements
• The minimum submergence must always be as indicated on the Certified Pump Outline Drawing.
• Never run the pump dry as this can cause the rotating parts within the pump to gall and seize to the
stationary parts.
• The parts are lubricated by the liquid being pumped unless the enclosed linshaft option is purchased
to lubricate the lineshaft bearings with a clean fluid.
Commissioning, Startup, Operation, and Shutdown (Continued)
Model VIT Installation, Operation, and Maintenance 53