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BOSCH REXROTH
PR4-3X/10,00-500RA12M01
R901093641
Radial Piston Pumps

Radial piston pumps: R4.-3x/

$4,435.00

BOSCH REXROTH

MATERIAL:  R901093641

SUMMARY:  Radial piston pumps: R4.-3x/

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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).

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

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 pumps

The 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

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

02

2

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

03

3

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

08

5

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

11

6

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

12

10

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

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.

Radial piston pump (specifications apply for a frequency of 50 Hz)

3 cylinders

5 or 10 cylinders

Loaded cylinder

Factor f

Loaded cylinder

Factor f

1

3.13

1

3.13

1+2

1.89

1+2

1.57

1+3

1.57

1+2+3

1.60

1+3+4

1.35

1+2+3+4

1.30

1+2+3

1.00

1+2+3+4+5

1.00

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

At pumps with 10 cylinders, 2 cylinders each are switched at a pressure port.

▼ 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

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

5-piston pump

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

10-piston pump

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

Characteristic curves – Flow:

(measured at n = 1450 min-1, v = 41 mm2/s and ϑ = 50 °C)

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

Characteristic curves – Drive power:

(measured at n = 1450 min-1, v = 41 mm2/s and ϑ = 50 °C)

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

Radial piston pump with 3 pistons

Dimensions in mm

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/
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

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/
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
Cylindrical shaft end Shaft end with serration according to DIN 5481

Radial piston pump with 10 pistons

Characteristic 01, 02 and 08
Dimensions in mm

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/
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
Cylindrical shaft end Shaft end with serration according to DIN 5481

Radial piston pump with 10 pistons

Characteristic 11 and 12
Dimensions in mm

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/
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
Cylindrical shaft end Shaft end with serration according to DIN 5481

Pump combination P2R4...

Other dimension see Dimensional drawings of PR4

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

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

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

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

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ 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

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/ 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. technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

Installation positions

B3

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

B5

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

V1

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

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 pumps

The 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

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/
technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

Example:
Pump combinationP3R4-3X/3.15-700...+AZPFF8-4

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

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

technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/technical illustration-PR4-3X/10,00-500RA12M01-Radial piston pumps: R4.-3x/

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!