Axial piston fixed pump A2FO series 70

Description

• Compact high-pressure pump with short installation length
• Size 45 … 125
• Nominal pressure 400 bar
• Maximum pressure 450 bar
• Open circuit

Features

• All-purpose high pressure pump
• Robust pump with long service life
• High power density
• Compact dimensions
• Very high total efficiency
• Robust 40° bent-axis technology

Type code

Technical data

Table of values

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 found in data sheet 90261.

Determining the operating characteristics
Flow		[l/min]
Torque		[Nm]
Power		[kW]

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
  

For operation with HF fluids please consult us.

Viscosity and temperature of hydraulic fluids

Selection of hydraulic fluid

Bosch Rexroth evaluates hydraulic fluids on the basis of the Fluid Rating according to the technical data sheet 90235.

Hydraulic fluids with positive evaluation in the Fluid Rating are provided in the following technical data sheet:

• 90245: Bosch Rexroth Fluid Rating List for Rexroth hydraulic components (pumps and motors)

The hydraulic fluid should be selected so that the operating viscosity in the operating temperature range is within the optimum range (νopt; 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

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

Permissible radial and axial forces of the drive shaft

Size				45	56		63	80		90
Drive shaft		Code		Z6/P6	Z6/P6	Z8/P8	Z8/P8	Z8/P8	Z9/P9	Z9/P9
		⌀	mm	30	30	35	35	35	40	40
Maximum radial force at distance a (from shaft collar)		Fq max	kN	7.6	9.5	8.1	9.2	11.6	10.2	11.5
		a	mm	18	18	18	18	20	20	20
Permitted torque at Fq max		Tq max	Nm	286	360	360	401	508	508	576
Permitted differential pressure at Fq max		Δpq max	bar	400	400	400	400	400	400	400
Maximum axial force, when standstill or in non-pressurized conditions		+ Fax max	N	0	0	0	0	0	0	0
		- Fax max	N	800	800	800	800	1000	1000	1000
Maximum axial force, per bar operating pressure		+ Fax max	N/bar	8.7	8.7	8.7	8.7	10.6	10.6	10.6

General information

• The specified values are maximum data and not approved for continuous operation.

• The axial force in the direction of action -Fax is to be avoided as this reduces the bearing life cycle.

• The output by means of belts requires special conditions. Please consult 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

Dimensions

Drive shafts

Overview of available drive shafts

Splined shaft DIN 5480

Parallel keyed shaft DIN 6885

Ports

Project planning information

Installation information

General information

• During commissioning and during operation, the axial piston unit must be filled with hydraulic fluid and bled. This must also be observed during longer standstill as the axial piston unit might drain itself via the hydraulic lines.

• Complete filling and bleeding must especially be ensured with the “Drive shaft upwards” installation position as there is, for example, the risk of running dry.

• The leakage in the housing area must be discharged to the tank via the highest-located drain port (T1, T2).

• If one joint drain line is used for several units, it is to be ensured that the relevant housing pressure is not exceeded. The joint drain line must be dimensioned so that the maximum admissible housing pressure of all connected units is not exceeded in any operating state, particularly during cold start. If this is not possible, separate drain lines have to be laid, if necessary.

• In order to achieve favorable noise values, all connection lines are to be decoupled using elastic elements and over-tank installation is to be avoided.

• The suction and drain lines must follow into the reservoir below the minimum fluid level in every operating state. The permissible suction height hs results from the overall loss of pressure; it must not, however, be higher than hS max = 800mm. The minimum suction pressure at port S must also not fall below 0.8 bar absolute during operation and during cold start.

• When designing the reservoir, ensure adequate space between the suction line and the drain line.This provides a slow-down and desgasification of the fluid and prevents that heated return flow is being drawn directly back into the suction line.

Installation position

See the following examples 1 to 8.

Further installation positions are possible upon request. Recommended installation position: 1 and 2.

Below-tank installation (standard)

Below-tank installation is at hand if the axial piston unit is installed below the minimum liquid level outside the tank.

Above-reservoir installation

Above-reservoir installation means that the axial piston unit is installed above the minimum fluid level of the reservoir.

Recommendation for installation position 8 (drive shaft upward): A check valve in the drain line (cracking pressure 0,5 bar) can prevent draining of the pump housing.

Note

• Connection F is part of the external piping and must be provided on the customer side to simplify the filling and bleeding.

General project planning notes

• The axial piston unit is designed to be used in open circuits.

• The project planning, installation and commissioning of the axial piston unit require the involvement of qualified skilled personnel.

• Before using the axial piston unit, please read the corresponding instruction manual completely and thoroughly. If necessary, request it from Bosch Rexroth.

• Before finalizing your design, request a binding installation drawing.

• The specified datas and notes must be observed.

• Preservation: Our axial piston units are supplied as standard with preservative protection for a maximum of 12 months. If longer preservative protection is required (maximum 24 months), please specify this in plain text when placing your order. The preservation times are valid under optimal storage conditions. Details of these conditions can be found in the data sheet 90312 or the instruction manual.

• A pressure relief valve is to be provided in the hydraulic system.

• Observe the instructions in the instruction manual regarding tightening torques of connection threads and other threaded joints used.

• The notes in the instruction manual on tightening torques of the port threads and other screw joints must be observed.

• The ports and fastening threads are designed for the permissible maximum pressure pmax (see instruction manual). The machine or system manufacturer must ensure that the connecting elements and lines correspond to the specified operating conditions (pressure, flow, hydraulic fluid, temperature) with the necessary safety factors.

• The working ports and function ports are only intended to accommodate hydraulic lines.

Safety Instructions

• During and shortly after operation, there is a risk of burns on the axial piston unit. Take appropriate safety measures (e.g. by wearing protective clothing).

Downloads

	固定容量形アキシアルピストンポンプ A2FO Data Sheet | RJ 91405 | 2020-10-23 | Japanese | PDF | 847k Product Groups: A2FO/70 シリーズ 70
	Аксиально-поршневой насос с постоянным рабочим объемом A2FO Data Sheet | R-RS 91405 | 2020-10-23 | Russian | PDF | 605k Product Groups: A2FO/70 Серия 70
	Axialkolben-Konstantpumpe A2FO Baureihe 70 Data Sheet | RD91405 | 2020-10-23 | German | PDF | 594k Product Groups: Fixed pumps, Fixed pumps
	Axial piston fixed pump A2FO Series 70 Data Sheet | RE91405 | 2020-10-23 | English | PDF | 590k Product Groups: Fixed pumps, Fixed pumps
	Axial piston fixed pump A2FO series 70 Data Sheet | RE-A91405 | 2021-03-24 | English | PDF | 723k Product Groups: Pumps, Fixed pumps Americas
	Axial piston fixed pump A2FO series 70 Manual | RE91405-01-B | 2021-05-21 | English | PDF | 1.7MB Product Groups: Fixed pumps Instruction manual
	Axialkolben- Konstantpumpe A2FO Baureihe 70 Manual | RD91405-01-B | 2021-05-21 | German | PDF | 1.7MB Product Groups: Fixed pumps Betriebsanleitung