Medium-consistency pump MC
STANDARD, C-01-000000
Rev. 0, 2010.02.09 OPERATION Kap.6 , Seite 6 of 12
GRZ-2698572-v1-Operation.FM
6.7 Specification of medium-consistency pump
(delivery head and flow rate)
Sizing The pump sizing (delivery head/flow rate) refers to the values shown on
the pump's type plate.
The values stated for delivery head and flow rate relate to a specific
impeller diameter and the specified operating speed.
If the impeller diameter or speed of the pump is changed, the duty point
moves to a different performance curve for head and flow rate.
Flow rate
change
The power consumption point on the curve can be changed by opening or
closing the valve in the delivery pipe further or by altering the pump
speed.
Changing the
operating
parameters
If the operating parameters for which the pump has been sized are
changed, the following should also be considered:
• All parameters for the pump (pressure, impeller diameter, ...) were
sized for the original duty point. These factors should be fully checked
for the new operating conditions.
• For continuous operation, a minimum flow rate is required. (see Tab.
6-6)
• The efficiency of the pump is the deciding factor in its overall service
life, thus the power requirement of the pump must be checked.
• The performance diagram is based on values with specific stock data.
If other liquids are pumped, the data on delivery head and flow rate, as
well as power requirement, may change. These factors were taken
into account when the pump was originally selected and should also
be considered if the operating conditions are changed.
CAUTION
Do not operate the pump with the valves closed as this may cause
damage to the pump!
Type Minimum flow rates
MC80-350 15 l/s
MC100-330 30 l/s
MC125-450 60 l/s
MC150-470 80 l/s
MC200-550 105 l/s
MC250-600 135 l/s
Tab. 6-6 Minimum flow rates
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