Grundfos AP50 submersible pumps are a range of Vortex- and single-channel (1-channel) impeller pumps designed for transferring drainage- or wastewater. Due to the 50 mm spherical clearances, 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.

AP50 pumps are available with 1.0 - 1.8 kW motors. The pump housings have an G 2 1/2" threaded connection. The nominal outlet diameter is DN 65. 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 thermal protection, an external thermal switch must be connected (contact Grundfos).