Intake side dimensions
In practice, the pump automatically starts intake due to decrease in pressure (pipe friction, intake
level) only in a certain range. In this operating range, it evacuates the air from the pump independent
of the suction line (for example, with initial start up operation). The intake characteristic line indicates
the dependence of intake length on the intake level. The determined value must be above the
represented intake line in the diagram. If the intake value is below the intake performance line, then a
charging pump (optional accessory RM-ECO LP) will be necessary to ensure the intake process
proceeds reliably and with sufficient safety.
Note: The charging pump boosts the water intakepressure, so that an intake level of up to 3 m high
can be attained. This means that, the performance curve moves 3 m parallel towards down.
Sample sizes
Example A:
Length of suction pipe = 16 m
Intake level = -2.40 m (Height difference between deepest intake position and pump) = o.k. since the
point of intersection lies above the performance curve
Example B:
Length of suction pipe = 34 m
Intake level = -2.80 m (Height difference between deepest intake position and pump) = not o.k., since
the point of intersection lies below the characteristic curve
Accessories such as charging pump RM Eco-LP (Article :- No: 22 00 97) is required in order to
support intake
