Depending on the design of gear hydraulic machines, they are used as pumps, motors and flow dividers at pressures up to 28-30 MPa in power hydraulic systems of machines. In the pressure range of 0.3-2.5 MPa pumps are used in the lubrication systems of engines, transmissions of various working machines, in compressors. Gear pumps are also used for pumping and transportation of liquids and quasi-liquid media with temperatures up to 250 ° C and viscosity 1-3800 cSt, including aggressive and abrasive media.
