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Company ProfilePoocca Hydraulic (Shenzhen) Co., Ltd
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External gear pump AZPN
The displacement of the PA-AZPB series of POOCCA external gear pumps ranges from 1cc to 7cc. Slide bearings for heavy duty applications, Long service life thru reinforced design of shafts and gray cast iron cover.
PA-AZPN Series Hydraulic gear pump
20 22.5 25 28 32 36
External Gear Pumps
Multiple gear pumps
Gear pumps are well-suited to tandem combinations of pumps in which the drive shaft of the first pump is extended to drive a second pump and sometimes a third pump in the same manner. A coupling is fitted between each pair of pumps.
In most cases each pump is isolated from its neighbor, i.e. the suction ports are separate from one another. A common suction port is also possible as an option.
Caution: Basically, the specifications for the single pumps apply, but with certain restrictions:Max. speed: This is determined by the highest rated pump speed in use.
Pressures: These are restricted by the strength of the drive shaft, the through drives and the drivers.
Gear pumps with integral valves
In order to reduce external pipework it is possible to incor- porate a flow-control valve or pressure-relief valve in the cover of the gear pump. A typical application of this is in the supply of hydraulic oil in power steering systems. The pump delivers a constant flow irrespective of the speed at which it is driven. The excess flow is either returned internally to the suction port or distributed externally to other items of equipment.