The Grundfos CR 64-2-1 A-F-A-V-HQQV is a three phase vertical multistage pump. The Grundfos CR range are vertical multistage pumps with a massive number of configurations and therefore a massive number of applications. There are three different material options - two grades of stainless steel and a titanium version for complete flexibility. There are then 11 flow sizes, each with multiple stage options, with up to 40 bar of pressure achievable. Further options include different shaft seals, voltages and frequencies. Versions are also available with integrated variable speed drives, with full control and remote management features available via a Grundfos Go controller.