The Grundfos NKE 65-125/120-110 S2 A2 F2 AE-SBQQE (Part Number 99539716) is a high-efficiency, speed-regulated single-stage in-line centrifugal pump. Designed for diverse applications including water supply, industrial pressure boosting, liquid transfer, and HVAC heating/cooling systems. It features a robust cast iron housing and impeller, a primary shaft seal of SBQQE (Silicon Carbide/Silicon Carbide/EPDM), and an IE5 efficiency class motor. This pump operates at a rated flow of 40 m³/h and a rated head of 25.5 m, with a maximum operating pressure of 16 bar and liquid temperature range from -25 to 120 °C. It is equipped with a DN 65 pipe connection and has a port-to-port length of 340 mm.