Check
Explanation/comment
Checked
Flow
It is difficult to accurately measure flow rate (volume/time). Any of the fol-
lowing methods of measuring can be used:
•
Venturi meters
•
Flow nozzles
•
Orifice plates
•
Timing the draw down in the wet well
Record any reading for future reference.
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 Check the rotation
WARNING:
•
Starting the pump in reverse rotation can result in the contact of metal parts, heat genera-
tion, and breach of containment. Ensure correct driver settings prior to starting any pump.
•
Failure to disconnect and lock out driver power may result in serious physical injury or
death. Always disconnect and lock out power to the driver before performing any installa-
tion or maintenance tasks.
•
Electrical connections must be made by certified electricians in compliance with all
international, national, state, and local rules.
•
Refer to driver/coupling/gear manufacturer's installation and operation manuals
(IOM) for specific instructions and recommendations.
1.
Lock out power to the driver.
2.
Make sure that the coupling hubs are fastened securely to the shafts.
3.
Make sure that the coupling spacer is removed.
The pump ships with the coupling spacer removed.
4.
Unlock power to the driver.
5.
Make sure that everyone is clear, and then jog the driver long enough to determine that the direc-
tion of rotation corresponds to the arrow on the pump.
6.
Lock out power to the driver.
5.6 Check the rotation
42
Model 3410 Installation, Operation, and Maintenance Manual
Содержание GOULDS PUMPS 3410
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