5.6 Limits of operation
Flow limits
WARNING:
Risk of serious physical injury or death. Exceeding any of the pump operating limits (e.g. -
pressure, temperature, power, etc.) could result in equipment failure, such as explosion, seiz-
ure, or breach of containment. Assure that the system operating conditions are within the capa-
bilities of the pump.
•
Do not exceed the output given on the motor name plate.
•
Avoid sudden changes in temperature (temperature shocks).
These flow limits are valid unless other data is available in the curves or data sheets:
Q
min
= 0.1 x Q
BEP
Short-term operation
Q
min
= 0.3 x Q
BEP
Continuous operation
Q
max
= 1.2 x Q
BEP
Q
BEP
= Flow in efficiency optimum
Permitted number of starts
Do not start the pump more than the number of times shown in this chart:
1
10
100
1
10
100
1000
Motor power [kW]
Maximum permitted
starts
per
hour
For pumps that use electric motors, do not start the motor more than the number of times listed in the
motor operation instructions. If two different numbers are shown, the lower number of starts is the limit.
5.7 Pump operation precautions
General considerations
Operation at reduced capacity
WARNING:
•
Risk of breach of containment and equipment damage. Excessive vibration levels can
cause damage to bearings, stuffing box, seal chamber, and/or mechanical seal. Observe
pump for vibration levels, bearing temperature, and excessive noise. If normal levels are
exceeded, shut down and resolve.
5.6 Limits of operation
28
Model ICP, ICPI, ICPH, ICPIH Installation, Operation and Maintenance Instruction
