RADIAL PISTON PUMP PR4-3X/1,60-700RA01V03
Manufacturer: Bosch Rexroth
Material #: R901091275
Model : PR4-3X/1,60-700RA01V03
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth PR4-3X/160-700RA01V03 (R901091275) is a high-quality radial piston pump designed for demanding industrial applications with open control loops. This pump features a robust cast iron housing, ensuring durability and a long service life, which is further enhanced by hydrodynamically lubricated plain bearings. With its constant displacement design, the PR4-3X/160-700RA01V03 ensures reliable performance and efficient operation.
The pump operates with a maximum pressure of and has a size of cm³, making it suitable for a wide range of hydraulic functions. It is designed to work at a minimum speed of min⁻¹ and can achieve a maximum speed of max⁻¹. The maximum flow rate provided by this pump is well-suited for various applications requiring precise fluid control.
One of the key features of this model is its self-priming capability, which simplifies the installation process and enhances its operational reliability. The valve-controlled mechanism ensures that the piston pumps maintain consistent performance throughout their service life. It supports several pressure ports with different cylinder combinations and sizes, offering flexibility in device design.
This particular model comes with FKM seals that are compatible with HLP hydraulic fluids, ensuring compatibility with standard hydraulic systems. The direction of rotation for this pump is clockwise, making it easy to integrate into existing machinery setups. It does not include throughdrive and has been designed without adding unnecessary weight to your equipment.
The PR4-3X/160-700RA01V03's assembly involves an eccentric shaft and multiple pump elements that work together to facilitate the suction and displacement procedures efficiently. Its operational mechanism guarantees that fluid handling is smooth, thus providing optimal hydraulic response for your industrial needs.
$3,601.00 USD
More are expected on April 21, 2025
Status: This product is temporarily out of stock.
Qty: Delivered as early as April 21, 2025 when ordered in
This product is eligible for factory repair.
Radial piston pump, size 1.6 cm3, pressure 700 bar for industrial applications, open circuit
3-piston pump
Unpacked Weight: 8.913 kg
Fixed displacement Self-priming, valve-controlled Long service life due to hydro-dynamically lubricated plain bearings Several pressure ports with different cylinder combinations 14 sizes, favorable grading for perfect device design
Assembly
The pumps are valve-controlled, self-priming radial piston pumps with fixed displacement.
They consist essentially of the housing (1), eccentric shaft (2) and 3, 5 or 10 pump elements (3), with suction valve (4), pressure valve (5) and piston (6).
Suction and displacement procedure
The pistons (6) are arranged radially to the eccentric shaft (2). The hollow piston (6) with the suction valve (4) is guided in a cylinder (7) and pressed onto the eccentric (2) by the spring (8). The radius of the piston running surface corresponds to the eccentric radius. The cylinder (7) provides sealing against a hemispherical element (9).
In downward movements of the piston (6), the working space (10) in the cylinder (7) is enlarged. Due to the resulting negative overpressure, the suction valve plate is raised from the sealing lip. Simultaneously, the connection from the suction chamber (12) to the working chamber (10) is realized by means of a radial groove (11) in the eccentric (2).
The working chamber is filled with fluid. In upward movements of the piston (6), the suction valve (4) is closed and the pressure valve (5) is opened. The fluid now flows to the system via the pressure port (P).
Data Sheet | Download Data Sheet |
3D CAD | Download 3D CAD |
Max. pressure | 700 |
Shaft end | Cylindrical Ø 25 mm with fitting key, ISO 3019-2 |
Size | 1.6 |
Speed min. | 1000 |
Productgroup ID | 9,10,11,12,13,14 |
Speed max. | 2000 |
Fastening | 4-hole fastening centering 63 mm |
Max. flow | 2 |
Displacement type | constant |
Direction of rotation | clockwise rotation |
Connection diagram | 3 |
Through-drive | without |
Weight | 8.913 |
Seals | FKM |
Hydraulic fluid | HLP |
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
||
PR4 |
– |
3X |
/ |
R |
* |
Type |
||||
01 |
Radial piston pump, fixed displacement, maximum pressure 700 bar |
PR4 |
||
Component series |
||||
02 |
Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions) |
3X |
||
Size |
NG |
Pressure rating |
|
|
03 |
Size – pressure stage (maximum) |
1,60 |
700 bar |
1,60-700 |
2,00 |
700 bar |
2,00-700 |
||
2,50 |
700 bar |
2,50-700 |
||
3,15 |
700 bar |
3,15-700 |
||
4,00 |
700 bar |
4,00-700 |
||
6,30 |
700 bar |
6,30-700 1) |
||
8,00 |
700 bar |
8,00-700 1) |
||
3,15 |
500 bar |
3,15-500 |
||
5,00 |
500 bar |
5,00-500 |
||
6,30 |
500 bar |
6,30-500 |
||
8,00 |
500 bar |
8,00-500 |
||
10,00 |
500 bar |
10,00-500 |
||
16,00 |
500 bar |
16,00-500 1) |
||
20,00 |
500 bar |
20,00-500 2) |
||
Direction of rotation |
||||
04 |
Viewed on drive shaft |
clockwise |
R |
|
Drive shaft |
||||
05 |
Parallel keyed shaft |
A |
||
Splined shaft 21 x 24, DIN 5481 |
G |
|||
Cylindrical shaft with output for mounting an AZPF or AZPFF |
K |
|||
Line connection |
||||
06 |
Pipe thread according to ISO 228/1 |
01 |
||
SAE thread to ANSI B1.1 |
12 |
|||
Seal material |
||||
07 |
NBR seals |
M |
||
FKM seals |
V |
|||
Pressure ports |
||||
08 |
1 Pressure port |
01 |
||
2 Pressure ports |
02 |
|||
3 Pressure ports |
03 |
|||
5 Pressure ports |
08 |
|||
6 Pressure ports |
11 |
|||
10 Pressure ports |
12 |
|||
Additional details |
||||
09 |
Further details in the plain text |
* |
1) | Not available with shaft versions "G" and "K" |
2) | Not available with shaft versions "K" |
Design options with multi-circuit pumpsThe following can be seen from the following schematic representations: the number and position of the pressure ports which cylinders are combined.Points mark the cylinders which are directly located at the pressurized pressure port. Circles mark the cylinders which are not directly located at the pressurized pressure port. The dashed and/or dot and dash lines show which cylinders are in each case combined. The pressurized pressure ports are designated in clockwise direction. The pressure port that - in clockwise direction - is closest to the suction port is referred to as P1 . |
||||
Type code (Pos. 08) |
Number of pressure ports |
Combination of cylinders |
||
3 pistons |
5 pistons |
10 pistons |
||
01 |
1 |
|||
02 |
2 |
|||
03 |
3 |
|||
08 |
5 |
|||
11 |
6 |
|||
12 |
10 |
01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
|||
R4 |
– |
3X |
/ |
R |
K |
M |
+ |
* |
Pump combinations |
||||
01 |
2-fold |
P2 |
||
3-fold |
P3 |
|||
Type |
||||
02 |
Radial piston pumps, fixed displacement |
R4 |
||
Component series |
||||
03 |
Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions) |
3X |
||
Size |
NG |
Pressure rating |
|
|
04 |
Size – pressure stage (maximum) |
1,60 |
700 bar |
1,60-700 |
2,00 |
700 bar |
2,00-700 |
||
2,50 |
700 bar |
2,50-700 |
||
3,15 |
700 bar |
3,15-700 |
||
4,00 |
700 bar |
4,00-700 |
||
3,15 |
500 bar |
3,15-500 |
||
5,00 |
500 bar |
5,00-500 |
||
6,30 |
500 bar |
6,30-500 |
||
8,00 |
500 bar |
8,00-500 |
||
10,00 |
500 bar |
10,00-500 |
||
Direction of rotation |
||||
05 |
Viewed on drive shaft |
clockwise |
R |
|
Drive shaft |
||||
06 |
Cylindrical shaft with output for mounting an AZPF or AZPFF |
K |
||
Line connection |
||||
07 |
Pipe thread according to ISO 228/1 |
01 |
||
SAE thread to ANSI B1.1 |
12 |
|||
Seal material |
||||
08 |
NBR seals |
M |
||
Pressure ports |
||||
09 |
1 Pressure port |
01 |
||
2 Pressure ports |
02 |
|||
3 Pressure ports |
03 |
|||
5 Pressure ports |
08 |
|||
Combination pumps |
||||
10 |
2-fold |
NG |
|
|
4 cm3 |
AZPF4 |
|||
5 cm3 |
AZPF5 |
|||
8 cm3 |
AZPF8 |
|||
11 cm3 |
AZPF11 |
|||
14 cm3 |
AZPF14 |
|||
16 cm3 |
AZPF16 |
|||
19 cm3 |
AZPF19 |
|||
22 cm3 |
AZPF22 |
|||
25 cm3 |
AZPF25 |
|||
28 cm3 |
AZPF28 |
|||
3-fold |
NG |
|
||
5 cm3 - 4 cm3 |
AZPFF5-4 |
|||
8 cm3 - 4 cm3 |
AZPFF8-4 |
|||
8 cm3 - 8 cm3 |
AZPFF8-8 |
|||
11 cm3 - 4 cm3 |
AZPFF11-4 |
|||
11 cm3 - 5 cm3 |
AZPFF11-5 |
|||
11 cm3 - 8 cm3 |
AZPFF11-8 |
|||
16 cm3 - 8 cm3 |
AZPFF16-8 |
|||
16 cm3 - 16 cm3 |
AZPFF16-16 |
|||
Additional details |
||||
11 |
Further details in the plain text |
* |
1) | Project planning information for multiple pumps has to be observed |
Size |
1,60 | 2,00 | 2,50 | 3,15 | 4,00 | 6,30 | 8,00 | 3,15 | 5,00 | 6,30 | 8,00 | 10,00 | 16,00 | 20,00 | |||||
Displacement |
geometric |
Vg |
cm³ |
1.51 | 2.14 | 2.59 | 3.57 | 4.32 | 7.14 | 8.63 | 3.39 | 4.82 | 5.83 | 8.03 | 9.71 | 16.07 | 19.43 | ||
Drive speed |
nmin |
rpm |
1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 | |||
nmax |
rpm |
2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | 2000 | ||||
Operating pressure |
absolute |
Inlet |
p |
bar |
0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | 0.8 ... 2.5 | |
Outlet |
continuous |
pN |
bar |
700 | 700 | 700 | 700 | 700 | 700 | 700 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | ||
Inner diameter of the cylinders |
Ø |
mm |
10 | 10 | 10 | 10 | 10 | 10 | 10 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | |||
Torque |
max. |
Drive shaft |
Nm |
160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 | 160 | ||
Number of cylinders |
3 | 3 | 3 | 5 | 5 | 10 | 10 | 3 | 3 | 3 | 5 | 5 | 10 | 10 | |||||
Weight |
m |
kg |
9.2 | 9.2 | 9.2 | 12.4 | 12.4 | 16.4 | 16.4 | 9.2 | 9.2 | 9.2 | 12.4 | 12.4 | 16.4 | 16.4 | |||
Drive shaft loading |
Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | Radial and axial forces cannot be absorbed! | |||||
Mounting type |
Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | Front face mounting | |||||
Line connections |
Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | Screw-in fittings | |||||
Direction of rotation, viewed on drive shaft |
clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | clockwise | |||||
Hydraulic fluid |
|||||||||||||||||||
Permissible hydraulic fluid 1) |
Mineral oil (HLP) to DIN 51524-2 | ||||||||||||||||||
Operating temperature range |
°C |
-10 … +70 | |||||||||||||||||
Viscosity range |
mm²/s |
10 … 200 | |||||||||||||||||
Maximum admissible degree of contamination of the hydraulic fluid 1) |
Class 20/18/15 according to ISO 4406 (c) |
1) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. |
Flow/drive power 1) |
||||||||||||||||||
Inner diameter of the cylinders mm |
Stroke mm |
Vg cm3 |
Pressure |
bar |
50 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
550 |
600 |
650 |
700 |
10 |
6.4 |
0.51 |
qV, eff |
l/min |
0.71 |
0.7 |
0.69 |
0.69 |
0.69 |
0.685 |
0.68 |
0.68 |
0.675 |
0.67 |
0.67 |
0.665 |
0.66 |
0.66 |
PA |
kW |
0.093 |
0.164 |
0.231 |
0.29 |
0.358 |
0.42 |
0.481 |
0.54 |
0.605 |
0.67 |
0.739 |
0.81 |
0.888 |
0.97 |
|||
10 |
9.1 |
0.71 |
qV, eff |
l/min |
1.02 |
1.01 |
1.0 |
0.995 |
0.99 |
0.985 |
0.98 |
0.975 |
0.97 |
0.965 |
0.96 |
0.955 |
0.95 |
0.94 |
PA |
kW |
0.129 |
0.23 |
0.328 |
0.41 |
0.503 |
0.58 |
0.677 |
0.77 |
0.856 |
0.94 |
1.046 |
1.16 |
1.257 |
1.36 |
|||
10 |
11.0 |
0.86 |
qV, eff |
l/min |
1.22 |
1.21 |
1.205 |
1.2 |
1.195 |
1.19 |
1.184 |
1.18 |
1.174 |
1.17 |
1.163 |
1.157 |
1.147 |
1.14 |
PA |
kW |
0.15 |
0.275 |
0.392 |
0.49 |
0.594 |
0.70 |
0.804 |
0.91 |
1.018 |
1.13 |
1.244 |
1.37 |
1.486 |
1.61 |
|||
15 |
6.4 |
1.13 |
qV, eff |
l/min |
1.6 |
1.59 |
1.58 |
1.567 |
1.56 |
1.556 |
1.546 |
1.54 |
1.53 |
1.523 |
– |
– |
– |
– |
PA |
kW |
0.213 |
0.40 |
0.547 |
0.7 |
0.85 |
1.00 |
1.14 |
1.27 |
1.433 |
1.566 |
– |
– |
– |
– |
|||
15 |
9.1 |
1.61 |
qV, eff |
l/min |
2.28 |
2.26 |
2.25 |
2.24 |
2.23 |
2.22 |
2.20 |
2.19 |
2.18 |
2.17 |
– |
– |
– |
– |
PA |
kW |
0.27 |
0.49 |
0.71 |
0.91 |
1.11 |
1.31 |
1.51 |
1.70 |
1.91 |
2.12 |
– |
– |
– |
– |
|||
15 |
11.0 |
1.94 |
qV, eff |
l/min |
2.74 |
2.73 |
2.71 |
2.7 |
2.68 |
2.67 |
2.65 |
2.64 |
2.62 |
2.6 |
– |
– |
– |
– |
PA |
kW |
0.32 |
0.57 |
0.826 |
1.06 |
1.31 |
1.55 |
1.80 |
2.05 |
2.29 |
2.53 |
– |
– |
– |
– |
1) | Mean values measured at n = 1450 rpm, Θ = 50 °C |
Uniformity coefficient f relative to n = 1450 rpm
The values from "Flow/drive power" table relate to 1 cylinder each.
To determine the required drive power, multiply the specified value by the number of cylinders.
The uniformity coefficient f should be taken into account.
▼ Example: Pump PR4–3X/1,60–700RA01M02
Port 1 and 2 are connected together and loaded with 450 bar, 3 is circulating at zero pressure.
PA = 2 × 0.605 kW = 1.21 kW
f = 1.57
Perf = 1.21 kW × 1.57 = 1.90 kW
Port 3 loaded with 300 bar, 1 and 2 run without pressure.
PA = 1 × 0.42 kW = 0.42 kW
f = 3.13
Perf = 0.42 kW × 3.13 = 1.31 kW
Port 1, 2 and 3, each loaded with 200 bar.
PA = 3 × 0.29 kW = 0.87 kW
f = 1
Perf = 0.87 kW × 1 = 0.87 kW
For applications outside these parameters, please consult us!
Sound pressure level (average):
(measured at n = 1450 min-1, v = 41 mm2/s and ϑ = 50 °C in a sound measuring chamber according to DIN 45635, part 26, Distance microphone – pump = 1 m)
The characteristic curves do not apply for versions with multiple circuits.
3-piston pump
5-piston pump
10-piston pump
Characteristic curves – Flow:
(measured at n = 1450 min-1, v = 41 mm2/s and ϑ = 50 °C)
Characteristic curves – Drive power:
(measured at n = 1450 min-1, v = 41 mm2/s and ϑ = 50 °C)
Radial piston pump with 3 pistons
Dimensions in mm
1) | Pipe thread according to ISO 228/1 |
2) | With line connection with characteristic 12, according to ANSI B 1.1 |
3) | With line connection with characteristic 12, connection adapter (SAE-12; 1 1/16-12 UN) according to ANSI B 1.1 not included in the scope of delivery |
Radial piston pump with 5 pistons
Dimensions in mm
1) | Pipe thread according to ISO 228/1 |
2) | With line connection with characteristic 12, according to ANSI B 1.1 |
3) | With line connection with characteristic 12, connection adapter (SAE-12; 1 1/16-12 UN) according to ANSI B 1.1 not included in the scope of delivery |
Radial piston pump with 10 pistons
Characteristic 01, 02 and 08
Dimensions in mm
1) | Pipe thread according to ISO 228/1 |
2) | With line connection with characteristic 12, according to ANSI B 1.1 |
3) | With line connection with characteristic 12, connection adapter (SAE-20; 1 5/8-20 UN) according to ANSI B 1.1 not included in the scope of delivery |
Radial piston pump with 10 pistons
Characteristic 11 and 12
Dimensions in mm
1) | Pipe thread according to ISO 228/1 |
2) | With line connection with characteristic 12, according to ANSI B 1.1 |
3) | With line connection with characteristic 12, connection adapter (SAE-20; 1 5/8-20 UN) according to ANSI B 1.1 not included in the scope of delivery |
Pump combination P2R4...
Other dimension see Dimensional drawings of PR4
L1 |
mm |
38.5 | |||||||||
L2 |
mm |
86.8 | |||||||||
L3 |
mm |
124.2 | 125.4 | 127.5 | 131.3 | 131.8 | 139.4 | 147.5 | 148.1 | ||
L4 |
mm |
170.5 | 173 | 177.1 | 182.1 | 187.1 | 190.5 | 195.5 | 200.9 | 217.3 | 222.1 |
Ø D1 |
mm |
40 | 55 | ||||||||
mm |
± 0.15 | ||||||||||
Ø D2 |
mm |
15 | 20 | 26 | |||||||
Ø D3 |
mm |
35 | |||||||||
mm |
± 0.15 | ||||||||||
Ø D4 |
mm |
15 | |||||||||
H1 |
mm |
15.7 | |||||||||
G |
M6 | ||||||||||
mm |
13 |
Pump combination P3R4...
Other dimension see Dimensional drawings of PR4
L1 |
mm |
38.5 | ||||||
L2 |
mm |
86.8 | ||||||
L3 |
mm |
125.4 | 127.5 | 131.3 | ||||
L4 |
mm |
208.4 | 212.5 | 215.8 | 217.5 | 218.7 | 220.8 | 233.5 |
L5 |
mm |
254.7 | 258.8 | 265.4 | 263.8 | 266.3 | 270.4 | 292.2 |
Ø D1 |
mm |
40 | ||||||
mm |
± 0.15 | |||||||
Ø D2 |
mm |
15 | 20 | |||||
Ø D3 |
mm |
40 | ||||||
mm |
± 0.15 | |||||||
Ø D4 |
mm |
15 | 20 | 15 | 20 | |||
Ø D5 |
mm |
35 | ||||||
mm |
± 0.15 | |||||||
Ø D6 |
mm |
15 | ||||||
Ø D7 |
mm |
35 | ||||||
mm |
± 0.15 | |||||||
Ø D8 |
mm |
15 | ||||||
H1 |
mm |
15.7 | ||||||
G |
M6 | |||||||
mm |
13 |
Installation instructions
Fluid tank
Adjust useful volume of the tank to the operating conditions. The admissible fluid temperature must not be exceeded; use coolers, if necessary.
Lines and ports
Remove protection plugs from the pump. We recommend the use of seamless precision steel pipes according to DIN EN 10305-1 and removable pipe connections. Select the clear width of pipes according to the ports (suction speed 1 to 1.5 m/s). Inlet pressure, see technical data. Thoroughly clean pipelines and fittings prior to installing.Proposal for piping layout
Under no circumstances may drain and returning fluid be drawn directly into the suction port again, i.e., select the largest possible distance between suction line and return line. The return drain must always be below the oil level. Ensure suction-tight installation of the pipes.Filter
Use a return flow or pressure filter, if possible.
(Suction filters only in connection with underpressure switch/clogging indicator).
Hydraulic fluid
Please observe our specifications according to data sheet 90220. We recommend brand name hydraulic fluids. Do not mix hydraulic fluids of different types since this can result in decomposition and deterioration of the lubricity. The hydraulic fluid must be replaced at regular intervals according to the operating conditions. When doing this, the hydraulic fluid reservoir must also be cleaned of residues.
Drive
Electric motor + pump carrier + coupling + pump
No radial or axial forces permissible on the pump drive shaft! Motor and pump must be exactly aligned! Always use a coupling that is suitable for compensating for shaft offsets! When installing the coupling, avoid axial forces, i.e., when installing, do not hammer or press the coupling onto the shaft! Use the female thread on the drive shaft.Installation positions
B3
B5
V1
Project planning information
When using radial piston pumps, we recommend particularly observing the information specified below. Project planning, assembly and commissioning of the radial piston pumps require the employment of trained experts.
Technical data
All specified characteristic depend on production tolerances and are valid at certain boundary conditions. Please note that consequently, certain scatter ranges are possible and that with changed boundary conditions (e.g. viscosity), the characteristics may also change.
Characteristic curves for flow and consumed power
When designing the drive motor, please observe the maximum application parameters possible.
Noise
The values for sound pressure level shown under Diagrams/characteristic curves have been measured according to DIN 45635 part 26. That means only the sound emission of the pump is shown. Environmental influences (such as place of installation, piping, etc.) have been eliminated. The values are in each case only valid for one pump. For circulation at zero pressure, the pressure line must be preloaded by means of a check valve (cracking pressure p = 5 bar) due to noise development.
Notice
Due to the power unit construction and the influence at the final place of installation of the pump, the sound pressure level will usually be 5 to 10 dB(A) higher than the value of the pump itself.
Project planning information for multiple pumps
Project planning information for multiple pumpsThe same general technical data apply as for single pumps. The pump with the higher load (pressure x flow) should be the first pump stage. When combining several pumps, the occurring torques may reach inadmissibly high values. The total of the torques must not exceed the admissible values (see table below)
|
||
Pump type |
Max. admissible |
|
Drive torque Tmax |
Output torque Tmax |
|
PR4... |
160 Nm |
45 Nm |
AZPF... |
45 Nm |
45 Nm |
AZPFF... |
45 Nm |
45 Nm |
Single pump |
Example: Tab2 = 45 Nm
T3 = 3.8 Nm ≤ Tab2 max
Tab1 = 45 Nm
T1,2 = T2 + T3
T1,2 = 18.8 Nm ≤ Tab1 max
Tmax = 160 Nm
T = T1 + T2 + T3
T = 63 Nm ≤ Tmax
|
Combination pump |
|
Calculation example: V = displacement in cm3 ηhydr.-mech. = hydraulic-mechanical efficiency T = torque in Nm Δp = pressure in bar
|
The pump combination can be operated with the calculated key data. |
Commissioning instructions
Air bleeding
All PR4 radial piston pumps are self-priming. Fill the housing with filtered oil via port S. During initial commissioning, set the pump to pressureless circulation. To do so, release the pressure hose and direct it into the reservoir. Before initial commissioning, the pump must be air-bled to protect it against damage. Switch to pressureless circulation, or direct the pressure line or pressure hose back into the reservoir. Briefly switch the pump on (inching mode). Should the pump not displace bubble-free oil after approx. 20 seconds, re-check the system. After the operating values have been reached, check the pipe connections for leakage. Check the operating temperature. Be aware of noise generation.
Commissioning
Check whether the system is thoroughly and properly installed. Start the pump without load and let it displace fluid without pressure for a few seconds in order to ensure sufficient lubrication. In no case may the pump be operated without hydraulic fluid!
Note
Adjustment, maintenance and repair of the pump may only be carried out by authorized, trained and instructed personnel! Use only original Rexroth spare parts! The pump may only be operated within the permissible data. The pump may only be operated when in perfect condition! When carrying out any work on the pump (e.g. installation and removal) the system must be switched off and depressurized! Unauthorized conversions and changes, affecting the safety and function are not permissible! Mount protective devices (e.g., coupling protection)! Do not remove any existing protective devices! The generally valid safety and accident prevention regulations must be strictly observed!Related Products
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