External gear pump High Performance

AZPB

  • Platform B

  • Fixed displacement

  • Size 1.0 … 7.1

  • Continuous pressure up to 220 bar

  • Intermittent pressure up to 250 bar

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

  • Combination of several pumps possible

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External gear pump Standard

AZPW

  • Platform F

  • Fixed displacement

  • Size 4 … 22

  • Continuous pressure up to 190 bar

  • Intermittent pressure up to 210 bar

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

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General information

It is the central task of external gear pumps to convert mechanical energy (torque and speed) into hydraulic energy (flow and pressure). To reduce heat losses, Rexroth’s external gear units offer very high efficiencies. They are realized by pressure-dependent gap sealing and highly precise production technology.

Rexroth external gear pumps are built in four frame sizes: Platform B, F, N and G. Within each platform different displacements can be realized by different gear widths. The pumps are available in the versions Standard, High-Performance, SILENCE und SILENCE PLUS. Further configuration variants are given by different flanges, shafts, valve arrangements and multiple pump combinations.

Construction

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 ring. The bearing forces are absorbed by slide bearings. These are designed for high pressures and have excellent dry-running qualities, especially at low rotational speeds. The gear wheels have 12 teeth. This keeps both flow pulsation and noise emission to a minimum.

The internal sealing of the pressure chambers is achieved by operating pressure-dependent forces. This ensures optimum efficiency. On the outer face, the movable bearing bushes are pressurized with operating 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.

External gear pump High Performance

AZPF

  • Platform F

  • Fixed displacement

  • Size 4 … 28

  • Continuous pressure up to 250 bar

  • Intermittent pressure up to 280 bar

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

  • Combination of several pumps possible

External gear pump High Performance

AZPN

  • Platform N

  • Fixed displacement

  • Size 20 … 36

  • Continuous pressure up to 250 bar

  • Intermittent pressure up to 280 bar

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

  • Combination of several pumps possible

External gear pump High Performance

AZPG

  • Platform G

  • Fixed displacement

  • Size 22 … 100

  • Continuous pressure up to 250 bar

  • Intermittent pressure up to 280 bar

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

  • Combination of several pumps possible

External gear pump SILENCE

AZPS

  • Platform F

  • Fixed displacement

  • Size 4 … 28

  • Continuous pressure up to 250 bar

  • Intermittent pressure up to 280 bar

  • Optimized pressure pulsation, reduces noise emissions and oscillations in the system

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

  • Combination of several pumps possible

External gear pump SILENCE

AZPT

  • Platform N

  • Fixed displacement

  • Size 20 … 36

  • Continuous pressure up to 250 bar

  • Intermittent pressure up to 280 bar

  • Optimized pressure pulsation, reduces noise emissions and oscillations in the system

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

  • Combination of several pumps possible

External gear pump SILENCE

AZPU

  • Platform G

  • Fixed displacement

  • Size 22 … 63

  • Continuous pressure up to 250 bar

  • Intermittent pressure up to 280 bar

  • Optimized pressure pulsation, reduces noise emissions and oscillations in the system

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

  • Combination of several pumps possible

External gear pump SILENCE PLUS

AZPJ

  • Platform F

  • Low noise fixed pump

  • Size 12 … 28

  • Continuous pressure up to 250 bar

  • Intermittent pressure up to 280 bar

  • Optimized pressure pulsation, reduces noise emissions and oscillations in the system

  • Pleasant pitch due to low frequency

  • Consistent high quality based on large-volume production

  • Long service life

  • Slide bearings for high loads

  • Drive shafts according to ISO or SAE and customer-specific solutions

  • Line ports: connection flange or screw thread

  • Combination of several pumps possible

SLP Multiple Pumps

Fast delivery program multiple pumps

  • Individual configuration of multiple external gear pumps

  • Two or three-way pumps configurable

  • Shipping within 10 working days

  • Documentation of all key technical data

  • Configured external gear pump is presented as a dimensional 2D drawing and 3D model

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