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EBARA Horizontal Split Case Pump
Operating, Installation, and Maintenance
(6)
In the case of correct installation and piping
layout, the standard value of vibration is shown
in the figure to the right. If there is excessive
vibration, it may be caused by alignment problems,
piping layout, loose anchor bolts, etc. Please
check.
(7)Check whether the mounting bolts of the
equipment and the connector screws of the
electrical wiring are loose.
(8)Please measure the insulation resistance of the
motor once a month. If the insulation resistance
is more than 1MΩ, there is no problem in
operation, but if it starts to drop suddenly even
if it is more than 1MΩ, it can be regarded as
abnormal, so repair is required.
Precautions
Precautions
6 6 . . 2 2 ) ) D D u u r r i i n n g g o o p p e e r r a a t t i i o o n n
Frequent start and stop operations can damage the pump. The starting frequency should
meet the following requirements:
The motor
outputs power
Start
frequency
EBARA
PUMPS AMERICAS CORPORATION
www.pumpsebara.com
PM10U-
(t) 803.327.5005 (f) 803.327.5097
To avoid operating in cavitation conditions. If the flow rate of
the pump is too large during operation, cavitation may occur. When
vibration and noise occur and the specified flow rate (pressure)
cannot be reached, cavitation will inevitably occur. In this case,
close the gate valve of the discharge port and reduce the flow
rate.
If the air mixed in the water pumping process is not discharged,
it will cause damage to the bearing and shaft seal, so that the
water cannot be pumped.
Below 7.5 kW
11 to 22
Less than 6
times per hour.
- 21 -
Standard Vibration
Vibration standard value
Rotation speed (r/min)
kW
Above 30 kW
Less than 4
times per hour.
times per hour.
EBARA
CB Series
Less than 3
CORPORATION
21
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