Daily Inspection; Precautions During Operation - EBARA GS Manual De Instrucciones Y Mantenimento

8.1 DAILY INSPECTION

EN
1. Significant variations in pressure, capacity, electricity, vibrations or noise may be a
sign of a malfunction of the pump. Refer to the table "Failures and Measures to be
taken". It is advisable to keep a daily register on the operating conditions with a view
to quickly discovering any symptoms that may be the result of a potential failure.
2. The maximum temperature for the bearing is 40°C above the ambient temperature,
with a maximum total limit of 80°C.
3. Generally, the mechanical seal does not show any leaks. Sometimes, at the begin-
ning of operation there is a small leak of water which then gradually decreases. If,
during normal operation, there is a major leak of water, you meed to replace the seal.
If it has a soft shaft seal, check whether there is a slight dripping of water.
4. The following figure shows the vibration values for the system under normal oper-
ating conditions. Excessive vibrations may be due to wear, stressed pipes or the
loosening of the anchor bolts of the top part.
Permitted vibration range (1/1000 mm)
Speed (RPM)

8.2 PRECAUTIONS DURING OPERATION

1. Operating the pump for a long period of time with the delivery valve closed may cause
damage to some of the pump components due to overheating inside the pump.
2. Too many stops and starts can cause damage to the pump. Limiting the number of
starts is recommended in line with the following:
N ≤ 6 when
N ≤ 4 when
N ≤ 3 when
N = start ups/h
P = motor power
16
P ≤ 7.5 kW
11 kW ≤ P ≤ 22 kW
P>22 kW
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