Pump Priming; Prime The Pump With The Suction Supply Above The Pump; Prime The Pump With The Suction Supply Below The Pump - ITT GOULDS PUMPS ICO i-FRAME Installation, Operation And Maintenance Manual

5.8 Pump priming

You must use an external sealing liquid under these conditions:
• The pumped fluid includes abrasive particles.
• The stuffing-box pressure is below atmospheric pressure when the pump is running with a suction
lift or when the suction source is in a vacuum. Under these conditions, packing is not cooled and
lubricated and air is drawn into pump.
Conditions for application of an external liquid
Condition
The stuffing box pressure is above atmospher-
ic pressure and the pumped fluid is clean.
The stuffing box pressure is below atmospher-
ic pressure or the pumped fluid is not clean.
An outside source of clean compatible liquid is
required.
5.8 Pump priming

5.8.1 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 until the pumped fluid flows out.
3. Close the air vents.
Item Description
1. Discharge isolation valve
2. Check valve
3. Suction isolation valve
Figure 23: Suction supply above pump

5.8.2 Prime the pump with the suction supply below the pump

Use a foot valve and an outside source of liquid in order to prime the pump. The liquid can come from
one of these sources:
• A priming pump
• A pressurized discharge line
• Another outside supply
1. Close the discharge isolation valve.
2. Open the air vent valves in the casing.
54
1
2
3
Model ICO i-FRAME, ICOH i-FRAME Installation, Operation, and Maintenance Manual
Action
Normal gland leaks of 40 to 60 drops per minute is usually sufficient
to lubricate and cool the packing. You do not need sealing liquid.
An outside source of clean compatible liquid is required.
You must connect the piping to the lantern ring connection with a 40
to 60 drops-per-minute leak rate. The pressure must be 1.01 kg/cm
| 15 psi above the stuffing box pressure.
2