For truck-mounted hydraulic systems, the most typical Gear Pump china design in use may be the gear pump. This design is certainly characterized as having fewer moving parts, being simple to support, more tolerant of contamination than other designs and relatively inexpensive. Gear pumps are fixed displacement, also called positive displacement, pumps. This means the same volume of movement is created with each rotation of the pump’s shaft. Gear pumps are rated in terms of the pump’s maximum pressure rating, cubic in . displacement and maximum insight speed 
limitation.
Generally, gear pumps are used in open center hydraulic systems. Gear pumps trap essential oil in the areas between the tooth of the pump’s two gears and the body of the pump, transport it around the circumference of the apparatus cavity and then power it through the store port as the gears mesh. Behind the brass alloy thrust plates, or wear plates, a small amount of pressurized oil pushes the plates tightly against the gear ends to boost pump efficiency.