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4LPPT70EN - 5/2023
5.2 Operation
The continuous maximum operating speeds of the pumps
are given in Table 5. If faster operating speeds are required,
contact your nearest LPP-T pump representative.
Table 5.
Maximum operating speeds.
Model
LPP-T32
(LPP-T 1.25)
LPP-T40
(LPP-T 1.5)
LPP-T50
(LPP-T 2)
LPP-T65
(LPP-T 2.5)
LPP-T80
(LPP-T 3)
Speed (rpm)
100
100
70
65
55
After starting, the pump starts rotating at its nominal speed
(unless it is equipped with a frequency inverter). The nominal
speed produces a nominal volume flow.
If the pump is equipped with a frequency inverter, the
rotation speed of the pump depends on the value set for the
frequency inverter. If the pump is controlled with a frequency
inverter using slow rotation speeds, ensure that the pump
motor does not overheat.
Never close the pump valves on the delivery side of the
pump, as this may cause overpressure and damage the
pipeline or the pump.
If the solid matter content of the pumped medium is high, the
pipe lines must be flushed when the pump is stopped. This
prevents the formation of blockages in the piping caused by
sedimentation of the medium.
A hose leak detector can be delivered with the pump
unit. The product must be connected to the control
system in order to guarantee correct operation.
The need to replace the hose can be monitored during use
of the pump by checking the volume flow of the pump and
the pump velocity. If the volume flow per rotation is lower
than the nominal production per rotation, the hose must be
replaced.
