Gear Pumps
External gear pumps are positive displacement pumps that cover a wide range of applications. The applications are in chemical, petrochemical, pharma- ceutical and paint industries as well as in general industry. In external gear pumps two counterrotating gears of equal size are enclosed in the casing. The gears transmit the torque as well as the fluid.
The fluid is transferred in the chambers between the gear teeth by counterrotation of the shafts from suction to discharge side. The materials used for the gears, the shafts and bearings allow high forces and temperatures. The pump casing is sealed to the atmosphere by O-rings.