Check
Explanation/comment
Checked
Pressure
Check and record both suction and discharge pressure gauge readings
for future reference. Also record the following:
•
Voltage
•
Amperage per phase
•
Kilowatts (if an indicating watt meter is available)
•
Pump speed
Temperature
Check and record bearing temperatures using a thermometer. The tem-
perature should not exceed 82°C | 180°F.
Vibration and sound
The acceptable vibration level of a centrifugal pump depends on the rigidi-
ty of the pump and the supporting structure. Recommended values for vi-
bration can vary between 0.20–0.60 ips (inches per second) velocity de-
pending on the operating characteristics and the structure. Refer to the
Centrifugal Pump section of the Hydraulic Institute Standards for a com-
plete description and charts on various pumps.
Field sound levels are difficult to measure because of background noise
from piping, valves, drivers, gears, and other parts. Follow the recommen-
dations in the Hydraulic Institute Standards.
5.6 Shut down the pump
WARNING:
Always disconnect and lock out power before servicing to prevent unexpected startup. Failure
to do so could result in death or serious injury.
Precautions must be taken to prevent physical injury. The pump may handle hazardous and/or
toxic fluids. Proper personal protective equipment should be worn. Pumpage must be handled
and disposed of in conformance with applicable environmental regulations.
1.
Shut down the pump driver.
Consult the manufacturer instructions for special operations.
2.
Close the suction and discharge valves.
3.
Close the seal liquid valves.
However, in order to prevent contamination to the packing, leave these lines open unless the pump
is completely drained.
4.
Open drain valves as required.
5.7 Freeze protection
Pumps that are shut down during freezing conditions must be protected using one of the following meth-
ods:
•
Drain the pump and remove all liquid from the casing.
•
Keep fluid moving in the pump and insulate or heat the pump to prevent freezing.
NOTICE:
If heat is used to prevent the pump from freezing, then the temperature should not rise above
66°C | 150°F.
5.6 Shut down the pump
Model 3409 Installation, Operation, and Maintenance Manual
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Содержание Goulds Pumps 3409
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