We can customize all kinds of gear pump for the hydraulicâ system Cbt-e3series gear pumps are external pumps with axial compensation and radial balancing. They are widely applied in hydraulic system and agricultural & tractors and engineering trucks. Cbt-e3series gear pumps can be provided with various kinds of mounting flange, shaft ends, and connection styles of inlet and outlet. Please refer to the table below. This series pump can be made as cbt-e3--side-in and rear-out, rear-in and side-out. Cbt-e3 pumps can also be combined as a relief pump cbt-e3ylwith safety valve, or as a constant flow pump cbt-e3hlwith constant flow valve.