Goulds Pumps 3420 - IOM User Manual
Page 34
Priming with a Separate Hand or Manually Controlled
Priming Pump (Fig. 20)
1.
Close the discharge valve.
2.
Open the valve in the priming line.
3.
Exhaust the air from the pump and the suction piping
until water flows from the priming pump.
4.
Close the valve in the priming line.
5.
Shutoff the priming pump.
6.
Start the pump and open the discharge valve.
Priming by Bypassing Around the Discharge Check
Valve (Fig. 21)
NOTE: This method can only be used when there is
liquid under some pressure in the discharge line. The
original prime must be effected from some outside
source.
1.
Close the discharge valve.
2.
Remove the vent plugs or open the vent valves on the
top of the pump and the two suction lobes.
3.
Open the valve in the check valve bypass line.
4.
Exhaust the air from the pump and the suction piping
until water flows from vent connections.
5.
Replace the vent plugs or close the vent valves and
close the valve in the bypass line.
6.
Start the pump and open the discharge valve.
30
3420 IOM 8/09
Fig. 20
Fig. 21