The DB-65 multistage pump, centrifugal and side channel, is designed with 6 stages, having a horizontal configuration. DB-65 ... Pump The DB-65 multistage pump, centrifugal and side channel, is designed with 6 stages, having a horizontal configuration, Shaft sealing ... of a pre-compression turbine at the suction end makes it possible to obtain a very small required NPSH, so that this pump ...