The Grundfos NK 50-315/331 A2F2AE-SBQQE is a genuine Grundfos end-suction centrifugal pump, identified by product number 98476310. Designed for reliable performance in water supply, industrial pressure boosting, liquid transfer, and HVAC heating/cooling systems. It features a robust cast iron pump housing and impeller, with a stainless steel shaft. The pump is equipped with an SBQQE primary shaft seal (Silicon Carbide/Silicon Carbide/EPDM) and is rated for a maximum operating pressure of 16 bar. It operates at 2900 rpm, delivering a rated flow of 45 m³/h and a rated head of 40.5 m. The pump is powered by an IE3 efficiency class motor (7.5 kW, 3x380-480V, 50 Hz) and has an IP55 enclosure class. It can handle liquid temperatures from -25 to 120 °C.