R902021574 A2FO12/61L-PZP06 REXROTH AXIAL-PISTON PUMP

Rexeoth Model list:

R902021574 A2FO12/61L-PZP06 Technical data:

Maximum speed

Note

• The values in the table are theoretical values, without consideration of efficiencies and tolerances. The values are rounded.

• Exceeding the maximum or falling below the minimum permissible values can lead to a loss of function, a reduction in operational service life or total destruction of the axial piston unit. Other permissible limit values, such as speed variation, reduced angular acceleration as a function of the frequency and the permissible angular acceleration at start (lower than the maximum angular acceleration) can be CONTACT US.

Hydraulic fluids

The axial piston unit is designed for operation with mineral oil HLP according to DIN 51524.

Application instructions and requirements for hydraulic fluids should be taken from the following data sheets before the start of project planning:

90220: Hydraulic fluids based on mineral oils and related hydrocarbons
90221: Environmentally acceptable hydraulic fluids
90222: Fire-resistant, water-free hydraulic fluids (HFDR, HFDU)
90223: Fire-resistan, water-containing hydraulic fluids (HFAE, HFAS, HFB, HFC)
90225: Restricted technical data for operation with fire-resistant hydraulic fluids

Viscosity and temperature of hydraulic fluids

Explanatory note regarding the selection of hydraulic fluid

The hydraulic fluid should be selected such that the operating viscosity in the operating temperature range is within the optimum range (vopt see selection diagram).

Selection diagram

Filtration of the hydraulic fluid

Finer filtration improves the cleanliness level of the hydraulic fluid, which increases the service life of the axial piston unit.

A cleanliness level of at least 20/18/15 is to be maintained according to ISO 4406.

At a hydraulic fluid viscosity of less than 10 mm²/s (e.g. due to high temperatures in short-term operation) at the drain port, a cleanliness level of at least 19/17/14 according to ISO 4406 is required.

For example, the viscosity is 10 mm²/s at:

• HLP 32 a temperature of 73°C

• HLP 46 a temperature of 85°C

Operating pressure range

Note

• Working pressure range valid when using hydraulic fluids based on mineral oils. Values for other hydraulic fluids, please contact us.

Pressure definition

Rate of pressure change

Maximum differential pressure at the shaft seal

Note

• The service life of the shaft seal is influenced by the speed of the axial piston unit and the case pressure.

• The service life decreases with an increase of the mean differential pressure between the case and the ambient pressure and with a higher frequency of pressure spikes.

• The case pressure must be equal to or higher than the ambient pressure.

Direction of flow

Notes for sizes 250 ... 1000:

• In case of radial forces limited performance data is valid. Please contact us.

• In case of axial forces during operation of the unit please contact us.

Effect of radial force Fq on the service life of bearings

By selecting a suitable direction of radial force Fq the load on the bearings caused by the internal rotary group forces can be reduced, thus optimizing the service life of the bearings. Recommended position of mating gear is dependent on direction of rotation. Examples:

Toothed gear drive, size 5 … 180

Toothed gear drive, size 200 … 1000

Long-life bearing

Size 250 to 1000

For long life cycle and use with HF hydraulic fluids. Identical external dimensions as design with standard bearing. Subsequent modification to long-life bearing is possible. Bearing and housing flushing via connection U is recommended.

Bearing flushing

Flushing flow (recommended)

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