This product is used for hydrostatic driven axial piston swash plate type variable displacement pump for open circuit. Rexroth pump flow and drive speed and pump displacement is proportional to the angle through the swashplate can change the flow steplessly. Flanges SAE-UNC or SAE-metric has two drain ports, high drive speed, good oil absorption, low noise, high power / weight ratio and a variety of variable modes (constant pressure, constant pressure / constant flow , Constant power) can be multi-loop system through-axis drive. Widely used in metallurgy, mining, engineering machinery, ships, civil aviation ground equipment and other areas of hydraulic transmission.