The Grundfos NKE 80-160/146 S2 A2 F2 AE-SBQQE (Product Number 99539754, also referenced as 9R4797 in some contexts) is a genuine Grundfos speed-regulated centrifugal pump designed for a wide range of applications including HVAC heating and cooling, water supply, industrial pressure boosting, and industrial liquid transfer. This high-efficiency pump features a robust cast iron housing (EN-GJL-250, ASTM A48-40 CL35B) and impeller (EN-GJL-200, ASTM A48-30 CL30B), equipped with an SBQQE primary shaft seal. It is rated for a maximum operating pressure of 16 bar and can handle liquid temperatures from -25 to 120 °C. The pump delivers a rated flow of 146.7 m³/h and a rated head of 48.9 m at 2900 rpm. It is powered by an IE5 efficiency class 160MC motor (18.5 kW, 3x 380-480V, 50 Hz) with an IP55 enclosure, ensuring reliable and energy-efficient operation. The pump is approved with CE, EAC, UKCA, WRAS, ACS, NSF61, and RCM certifications. Its dimensions are 760 mm length, 400 mm width, and 400 mm height, with a net weight of 145 kg.