Compact structure, small size, and light weight. The front cover, intermediate body, and rear cover are made of aluminum alloy, gears made of alloy steel, and pressure plates made of aluminum alloy. Two DU bearings are installed inside the front and rear covers respectively. DU material is an ideal bearing material for gear pumps, which can greatly improve the service life of gear pumps. 2. Reliable work. The pressure plate is the main component for radial and axial pressure compensation, which can reduce bearing load.