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 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

• Domestic 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 control unit CU301, preventing overheating and motor winding damage. However, this function serves only as an emergency measure. In cases 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, characterised 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 elements such as:

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

Advantages of Grundfos SQE Pumps

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