For truck-mounted hydraulic systems, the most common design in use may be the Gear Pump china equipment pump. This design is definitely characterized as having fewer moving parts, being easy to services, more tolerant of contamination than additional designs and fairly inexpensive. Gear pumps are set displacement, also called 
positive displacement, pumps. This means the same volume of circulation is produced with each rotation of the pump’s shaft. Gear pumps are rated when it comes to the pump’s optimum pressure rating, cubic inch displacement and maximum insight speed limitation.
Generally, gear pumps are found in open center hydraulic systems. Gear pumps trap essential oil in the areas between the teeth of the pump’s two gears and the body of the pump, transport it around the circumference of the apparatus cavity and then drive it through the wall plug slot as the gears mesh. Behind the brass alloy thrust plates, or wear plates, a small amount of pressurized essential oil pushes the plates tightly against the gear ends to improve pump efficiency.