Rexroth Pump
Rexroth Metering Pump A7VK
  • Description
  • Technique Feature
  • Specification
  • Applied Range

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Data Sheet of Rexroth A7VK

REXROTH Type Code of A7VK Series

 

 

 

General instructions

▶ The pump A7VK is designed for pumping polyurethane components in open and closed design.

▶ The project planning, installation and commissioning of the axial piston unit requires the involvement of qualified personnel.

▶ Before using the axial piston unit, please read the corresponding instruction manual completely and thoroughly.

If necessary, these can be requested from Bosch Rexroth.

▶ During and shortly after operation, there is a risk of burns on the axial piston unit and pressure relief valve on the

service line port. Take appropriate safety measures (e.g.by wearing protective clothing).

▶ Service line ports

– The ports and fastening threads are designed for the specified maximum pressure. 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 service line ports and function ports are only designed to accommodate hydraulic lines.

▶ The data and notes contained herein must be adhered to.

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

▶ Not all versions of the product are approved for use in a safety function pursuant to ISO 13849. If you require characteristic values relating to reliability (e.g. MTTFd) for functional safety, please consult the responsible contact person at Bosch Rexroth.

▶ A pressure relief valve is to be fitted in the hydraulic system.

▶ The following tightening torques apply:

– Fittings: Observe the manufacturer’s instructions regarding the tightening torques of the fittings used.

– Mounting bolts: For mounting bolts with metric ISO thread according to DIN 13, we recommend checking the tightening torque in individual cases in accordance with VDI 2230.

– Female threads in the axial piston unit: The maximum permissible tightening torques MG max are maximum values of the female threads and must not be exceeded. For values, see the following table.

– Threaded plugs: For the metallic threaded plugs supplied with the axial piston unit, the required tightening torques of threaded plugs MV apply. For values, see the following table.

Technical data

Table of values

Size

12

28

55

107

Displacement
geometric, per revolution

 

Vg max

cm³

11.6

28.1

54.8

107

Nominal pressure

 

pnom

bar

250

250

250

250

Maximum pressure

 

pmax

bar

315

315

315

315

Flow

at Vg max and nnom

qV nom

l/min

20.9

50.6

98.6

192.6

at Vg max and n = 1500 rpm

qV 1500

l/min

17.4

42.2

82.2

160.5

Power

at qV nom and pnom

P

kW

8.7

21.1

41.1

80.3

at qV 1500 and pnom

P 1500

kW

7.3

17.6

34.2

66.9

Torque

at Vg max and pnom

M

Nm

46.2

111.8

218

425.7

Weight (approx.)

 

m

kg

11.7

22.1

31

55

 

Rexroth Metering pump for polyurethane components Features

- Mounting flange, drive shaft and functions identical to A2VK, thus easy to replace

- Reduced dimensions and mass in comparison to A2VK

- Improved volumetric efficiency through robust unit in well-tried axial tapered piston technology

- Manual adjustment with precision gauge and clamping device to prevent unintended adjustment

- Double shaft sealing of special compound and flushing chamber

- In closed design (A7VKG) or open design (A7VKO) available

- Increased corrosion protection through special surface treatment

- Optional with mounted high-pressure relief valve

- Low noise

- Bent-axis design

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