Daily Inspection - EBARA GS Instruction Manual

1. Daily inspection

(1) If pressure, current, capacity, vibration, or noisy differ markedly from normal, trouble of some kind is
probably going to occur, and you should take prompt corrective action. Refer to
Troubleshooting for diagnosis and corrective action. You are advised to post a Daily Operation
Condition Check Sheet.
Note
(2) For standard specification, allowable operating temperature of bearing is no more than Room
temperature＋40℃, and no more than 80℃.
(3) There should be almost no leakage if the mechanical seal is normal. If there is a large amount of
leakage, replace the mechanical seal.
(4) Normally, there should be almost no leakage for a mechanical seal. However, at the beginning of
operating of pump, a little water leakage from a mechanical seal is recognized. As the pump is
operating for a while, the water leakage would be decremented, otherwise you should stop the pump
and check it. During daily inspection, losing the bolts of the protector.
protector. It may cause bolts to be lost.
(5) For gland packing specification, make sure the water leakage value is moderate according to Table 2.
and preventing over tightening and uneven tightening gland packing. If the water leakage value could
not be adjusted, there might be a deterioration occurring at shaft seal parts. Therefore, it is necessary
to exchange gland packing or both gland packing and shaft, and then adjusting the water leakage.
(6) Standard value of vibrations for when the pump is installed correctly, and piping work has been
performed correctly are shown in Fig.5. Wrong piping work can often cause excessive vibrations.
(7) Make sure that mounting bolts and terminal screws of electrical wiring are fasten firmly.
(8) Measure the insulation resistance of motor once a month. It is okay when the insulation resistance
value is equal to or greater than the 5MΩ. However, when the insulation resistance value drops
suddenly, no matter the insulation resistance value is more than the 5MΩ or not, the repair of motor is
required
Standard performance curves can be obtained from EBAS sales office
or dealers.
Permitted vibration range (1/1000 mm))
Speed (min
Fig.5 Vibration standard
- 16 -
Do not remove the bolt of the
-1
)
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