2. Maintenance and Inspection
M
Daily inspection
[1]
Check whether the pump operates smoothly, without generating any abnormal noise or vibration.
[2]
Check the level of the liquid in the suction tank and the suction pressure.
[3]
Compare the discharge pressure and electric current measured during operation with the values indicated on the
motor nameplate for the verification of normal pump load.
* Note that the values indicated on the pressure gauge vary in proportion to the specific gravity of the liquid.
The cock of the pressure gauge or vacuum gauge must be opened only when measurement is carried out. It
must be closed upon the completion of each measurement. If the cock remains open during pump operation,
the meter mechanism may be affected by abnormal pressure caused by water hammer action.
[4]
If a spare pump is available, activate it from time to time to keep it ready for use any time.
[5]
Check to be sure there is no liquid leakage in the pump before operating it. If leakage is detected, never try to
operate the pump.
[6]
Check to be sure the discharge pressure, discharge flow rate, and motor power supply voltage do not fluctuate
during pump operation. If considerable fluctuation of the respective values occurs, refer to "1. Causes of
Trouble and Troubleshooting" for correct measures.
M
Periodic inspection
To ensure efficient and smooth operation of the pump, carry out periodic inspections by the following procedures
described below.
The overhauling and repair work for IWAKI pumps must be performed by qualified and trained personnel. User’s
failure to observe this instruction exempts IWAKI from the responsibility for personal injury or damage to the
equipment or facility which result from its misuse.
- 35 -
