Product details
External gear pump AZPW
The displacement of the PA-AZPW 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.
Name |
PA-AZPW Series Hydraulic gear pump |
Series |
Series W |
Sizes |
4 5.5 8 11 14 16 19 22.5 |
Nominal Pressure |
190 bar |
Maximum Pressure |
210 bar |
Operation Mode |
External Gear Pumps |
AZPW | |||||||||||
Displacement |
V |
cm3/rev |
4 |
5.5 |
8 |
11 |
14 |
16 |
19 |
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 |
190 |
180 |
170 |
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Max. intermittent pressure p2 |
210 |
200 |
190 |
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Max. peak pressure p3 |
230 |
220 |
210 |
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Min. rotational speed |
12 mm2/s |
< 100bar |
rpm |
700 |
700 |
700 |
700 |
700 |
700 |
700 |
700 |
100...180bar |
1200 |
1200 |
1000 |
1000 |
800 |
800 |
800 |
800 |
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180... p2 |
1400 |
1400 |
1400 |
1200 |
1000 |
1000 |
1000 |
1000 |
|||
p2 |
700 |
700 |
700 |
700 |
700 |
700 |
700 |
700 |
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Max. rotational speed at p2 |
3500 |
3500 |
3000 |
3000 |
3000 |
2500 |
POOCCA external gear pumps are available as standard performance gear pumps in the series W. The displace- ments are graded by different gear widths. Further configu- ration variants are given by different flanges, shafts, valve arrangements and multiple pump combinations.
The external gear pump consists essentially of a pair of gear wheels supported in bearing bushes and the housing with a front and a rear cover. The drive shaft protrudes from the front cover where it is usually sealed by the shaft seal. The bearing forces are absorbed by slide bearings.
These were designed for high pressures and have excellent emergency running properties, especially at low rotational speeds. The gear wheels have 12 teeth. This keeps both flow pulsation and noise emission to a minimum. The inter- nal sealing of the pressure chambers is achieved by delivery pressure-dependent forces.
This ensures optimum effi- ciency. On the rear side, the movable bearing bushes are pressurized with working pressure and pressed as seals against the gear wheels. Special seals form the boundary of the pressurized zone. The radial sealing at the tips of the gear teeth against the case is provided by smallest possible gaps that are formed pressure-dependent between the gear wheels and the housing.
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