Two types

Gear pump: With a simple structure, low cost, and strong anti pollution ability, but with large flow pulsation and high noise, it is mostly used in small excavators or auxiliary systems.

Piston pump: with complex structure and high cost, but high working pressure, large flow rate, high efficiency, and high control accuracy, it is widely used in medium and large excavators.

working principle

The working principle of hydraulic pumps is based on changes in volume. Taking plunger pump as an example:

Oil suction process: The plunger moves backwards, the pump chamber volume increases, forming a vacuum, and the hydraulic oil in the oil tank enters the pump chamber under atmospheric pressure.

Oil pressure process: The plunger moves forward, the pump chamber volume decreases, the hydraulic oil is compressed, the pressure increases, the oil outlet valve is pushed open, and high-pressure oil enters the hydraulic system.

Belparts was established in September 2013, has a history of eleven years which is loed in Guangzhou.

Our main products are Excavator Hydraulic spare parts, Hydraulic main pump, Swing Motor, Travel Motor, Final Drive Ass'y, Swing Device Ass'y, Swing Gearbox, Travel Gearbox, Gears, Regulators, Relief Valve, Fan motor and other hydraulic items with genuine and aftermarket quality.

Until now, our products enjoy a high reputation and have been exported to more than 125 countries and regions, spreading all over the Middle East, Southeast Asia, Africa, North America, South America, Europe and Oceania with its own brand "Belparts" which are widely acclaimed by foreign customers.

If you are interested in any models, please contact with us with the OEM model code, and we will share with our product catalogue and check the prices for you very soon.