Hydraulic gear pump AZPF
The displacement of POOCCA external gear pump PA-AZPF series ranges from 4cc-28cc. It has a variety of Drive shafts SAE or ISO and a variety of Ports: threaded or flange.
Name |
PA-AZPF Series Hydraulic gear pump |
Series |
Series F |
Sizes |
004 005 008 011 014 016 019 022 025 028 |
Nominal Pressure |
230 bar |
Maximum Pressure |
250 bar |
Operation Mode |
External Gear Pumps |
AZPF-1x | ||||||||||||
Displacement |
V |
cm3/rev |
4 |
5.5 |
8 |
11 |
14 |
16 |
19 |
22.5 |
22.5 |
|
Suction pressure pe |
0.7...3 (absolute), with tandem pumps: pe ( p2) = max. 0.5 > pe ( p1) |
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Max. continuous pressure p1 |
bar |
250* |
210 |
180 |
210 |
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Max. intermittent pressure p2 |
280* |
230 |
210 |
230 |
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Max. peak pressure p3 |
300 |
250 |
230 |
250 |
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Min. rotational speed |
< 100 |
rpm |
600 |
500 |
500 |
500 |
500 |
500 |
500 |
500 |
500 |
|
100...180 |
1200 |
1200 |
1000 |
1000 |
800 |
800 |
800 |
800 |
800 |
|||
180... p2 |
1400 |
1400 |
1400 |
1200 |
1000 |
1000 |
1000 |
1000 |
1000 |
|||
25 mm2/s p2 |
700 |
700 |
700 |
600 |
500 |
500 |
500 |
500 |
500 |
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Max. rotational speed at p2 |
4000 |
3500 |
3000 |
3000 |
3000 |
2500 |
3000 |
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AZPF-2x | ||||||||||||
Displacement |
V |
cm3/rev |
4 |
5.5 |
8 |
11 |
14 |
16 |
19 |
22.5 |
25 |
|
Suction pressure pe |
bar |
0.7...3 (absolute), with tandem pumps: pe ( p2) = max. 0.5 > pe ( p1) |
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Max. continuous pressure p1 |
250 |
220 |
195 |
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Max. intermittent pressure p2 |
280 |
250 |
225 |
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Max. peak pressure p3 |
300 |
290 |
265 |
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Min. rotational speed |
< 100 |
rpm |
600 |
500 |
500 |
500 |
500 |
500 |
500 |
500 |
500 |
|
at bar 12 mm2/s |
100...180 |
1200 |
1200 |
1000 |
1000 |
800 |
800 |
800 |
800 |
800 |
||
180... p2 |
1400 |
1400 |
1400 |
1200 |
1000 |
1000 |
1000 |
1000 |
1000 |
|||
25 mm2/s p2 |
700 |
700 |
700 |
600 |
500 |
500 |
500 |
500 |
500 |
|||
Max. rotational speed at p2 |
4000 |
3500 |
3000 |
3000 |
3500 |
3500 |
3000 |
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* Pumps with threaded ports may experience reduced life if used continuously above 210 bar. |
POOCCA PA-AZPF series external gear pumps can be combined with tandem pumps. Examples: PA-AZPFF, PA-AZPFB, PA-AZPNF, PA-AZPGF, etc.
The POOCCA PA-AZPF Series external gear pump consists essentially of a pair of gears supported in bearing bushings, and the case with a front and a rear cover. The drive shaft protrudes from the front cover where it is sealed by the shaft seal ring. The bearing forces are absorbed by special bearing bushings with sufficient elasticity to produce surface contact instead of line contact.
They also ensure excellent resistance to galling – especially at low speed. The gears have 12 teeth. This keeps both flow pulsation and noise emission to a minimum.
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 rear 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 suc- tion port or distributed externally to other items of equipment.
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