Submersible Pumps SQE

SQE pumps are designed for pumping thin, clean, non-aggressive, and non-explosive liquids that do not contain mechanical or fibrous impurities. A key advantage of the SQE series borehole pumps is the built-in electronic unit with a frequency converter that allows for smooth speed regulation and ensures a soft start. They are made from AISI 304 stainless steel, which is suitable for contact with drinking water.

Applications

The pumps are suitable for continuous operation and are ideal for a wide range of operational applications

• Household water supply
• Use in small waterworks
• Irrigation
• Filling and emptying tanks
• Pressure boosting

Dry Run Protection

The pumps are protected against dry running. In the event of insufficient water in the borehole, the pump will automatically shut off thanks to the CU301 control unit, preventing overheating and motor winding damage. However, this function serves only as an emergency measure. In the case of low borehole yield, the pump should be supplemented with external level monitoring.

High Efficiency of Pump and Motor

The electrohydraulic design ensures high efficiency for this pump, which in turn results in low electricity consumption and thus low operating costs. The motors are designed according to the permanent magnet principle (PM motor). This is the most modern type of synchronous electric motor, characterized by high efficiency and reliability across a wide performance range. The same type of motors is used, for example, in electric vehicles. Reliability and efficiency are also supported by auxiliary components such as:

• Tungsten carbide or technical ceramic bearings
• Axial bearings as protection against upward axial pressure
• Longevity comparable to conventional motors

Advantages of Grundfos SQE Pumps

• Protection against thrust
• Smooth pump start
• Overvoltage and undervoltage protection
• Overheat protection
• Emergency dry run protection