Grundfos AP40 submersible pumps are a range of Vortex- and single-channel (1-channel) impeller pumps designed for transferring drainage- or wastewater. Due to the 30 mm spherical clearance, they are suitable for pumping liquids containing larger solids, such as fibres and textiles.

They are used for various applications in public and private sector, trade and industry. The compact design makes the pumps suitable for both temporary and permanent installation. The pumps can be installed on an auto-coupling system or on a ring stand to the bottom of the pit.

The pumps are made of wear-resistant materials, such as cast iron and stainless steel.

AP40 pumps are available with 0.7 kW motors. The pump housings have an G 2" threaded connection.

The pumps are designed for continuous (S1) operation. In this operating mode, the pump can operate continuously without being stopped for cooling. Intermittent (S3) operation between 40°C and 60°C liquid temperature is permitted up to 30% (3 minutes of operation, then 7 minutes of standby).

Models are available with float switch control on request.

For 1-phase motors, thermal protection is ensured by a thermistor enclosed in the motor windings. It automatically resets after cooldown and does not require outside control. For 3-phase motors, external thermal switch must be connected (contact Grundfos).