The Grundfos N3AU99, corresponding to product number 98973513, is a robust, single-stage, non-self-priming centrifugal pump from the NK 100-200 series. This standard base pump features a durable cast iron housing (EN-GJL-250) and a stainless steel impeller (DIN W.-Nr. 1.4301, AISI 304), ensuring reliable performance in demanding industrial and commercial environments. Equipped with an SBQQE mechanical shaft seal (Silicon Carbide/Silicon Carbide/EPDM), it is designed for efficient water supply, industrial pressure boosting, and integration into heating and air conditioning systems. The pump operates at 2900 rpm, delivering a rated flow of 100 m³/h and a rated head of 48.7 meters, with a maximum operating pressure of 16 bar. It is suitable for liquid temperatures ranging from -25 °C to 120 °C.