What are the operating limitations for the BQW submersible sewage pump?

Main operating conditions are as follows:

Power Supply:AC 50Hz,Rated voltage 380V/660V/1140V(Voltage fluctuation±10%).

Temperature:Ambient working temp 0-40°C;Medium temp≤40°C.

Medium:pH 4-10;Volume concentration of solid impurities≤4%.

Particles:Max particle size≤50%of the minimum flow passage cross-section.

Submergence Depth:≤5m,and water level must not be lower than the suction strainer.