At the beginning of the design, it has been ensured that the gear pump, the type of performance parameters and what kind of gear pump to choose.

1. The selected gear pump type and performance must meet the flow, head, pressure, temperature, cavitation flow, suction head and other parameters of the equipment. Gear pump also needs to meet its medium characteristics. In general, for transportation of inflammable (explosive) or toxic and valuable media, gear pump shaft seal is reliable, can not leak, magnetic drive and so on. When the gear pump transports corrosive medium, it needs to use convection action element resistance material, such as fluoroplastic anti-corrosion gear pump.

2. In the aspect of machinery, gear pump should have higher reliability, low noise and small vibration.

3. When purchasing gear pump, correctly calculate and purchase the cost (such as equipment cost, maintenance cost, operation cost and management cost, etc.)