INTERNAL GEAR PUMPS

PGF

Material #: R900929805

Model : PGF2-2X/016RT20VU2

Fixed displacement Low operating noise Low flow pulsation High efficiency also at low viscosity due to sealing gap compensation Long service life due to plain bearings and sealing gap compensation Suitable for broad viscosity and speed ranges Very good suction characteristic All frame sizes and sizes can be combined with each other Can be combined with internal gear pumps PGH, vane pumps PV7 and axial piston pumps Integrated valve technology in the connection cover possible upon request For drives in the minor and medium performance and pressure range in industrial applications, e.g. machine tools With high operating pressure for fatigue-resistant drives in mobile applications, for example lifting equipment, fans and spreaders

This product is not available. Please call 888-REXROTH to speak to a local distrubutor who can assist in locating your part or a suitable replacement

Fixed displacement Low operating noise Low flow pulsation High efficiency also at low viscosity due to sealing gap compensation Long service life due to plain bearings and sealing gap compensation Suitable for broad viscosity and speed ranges Very good suction characteristic All frame sizes and sizes can be combined with each other Can be combined with internal gear pumps PGH, vane pumps PV7 and axial piston pumps Integrated valve technology in the connection cover possible upon request For drives in the minor and medium performance and pressure range in industrial applications, e.g. machine tools With high operating pressure for fatigue-resistant drives in mobile applications, for example lifting equipment, fans and spreaders

Set-up

Hydraulic pumps of type PGF are leakage gap-compensated internal gear pumps with constant displacement. They basically comprise of housing (1), bearing cover (1.1), end cover (1.2), internal gear (2), pinion shaft (3), plain bearings (4), axial washers (5) and stop pin (6), as well as the segment filler element (7) consisting of segment (7.1), segment support (7.2) and the seal rolls (7.3).

Suction and displacement procedure

The hydrodynamically supported pinion shaft (3) drives the internally geared internal gear (2) in the displayed direction of rotation. During the rotation, there is a volume increase over an angle of approx. 180° in the suction range. An underpressure results and fluid flows into the chambers. The sickle-shaped segment filler element (7) separates suction and pressure chamber. In the pressure chamber, the teeth of the pinion shaft (3) engage in the space between the teeth of the internal gear (2) again. The liquid is displaced via the pressure channel (P).

 

Axial compensation

The axial compensation force FA takes effect in the area of the pressure chamber and is generated with the pressure field (8) in the axial washers (5). So the axial longitudinal gaps between the rotating and the fixed parts are extraordinarily small and ensure perfect axial sealing of the pressure chamber.

Radial compensation

The radial compensation force FR acts on segment (7.1) and segment support (7.2). The area ratios and the position of the sheet seals (7.3) between the segment and segment support are designed so that an almost leakage gap-free sealing between internal gear (2), segment filler element (7) and pinion shaft (3) is achieved. Spring elements under the sheet seal (7.3) ensure sufficient contact pressure, also with very low pressures.

Hydrodynamic and hydrostatic mounting

The forces acting on the pinion shaft (3) are accepted by hydrodynamically lubricated radial plain bearings (4); the forces acting on the internal gear (2) by the hydrostatic bearing (9).

Gear tooth system

The gear tooth system is an involute tooth system. Its large meshing length results in little flow and pressure pulsation; these little pulsation rates considerably contribute to the low-noise running.

Materials used

Housings (1), bearing covers (1.1), end covers (1.2) and axial washers (5): Aluminum alloy internal gear (2), pinion shaft (3) and stop pin (6): steel plain bearing (4): Copper-tin with steel back segment (7.1) and segment support (7.2): brass alloy sheet seals (7.3): Plastic

 

 

 

 

 

01

02

03

04

05

06

07

09

10

11

PG

F

-

/

V

*

Type

01

Internal gear pump, fixed displacement, gap-compensated

PG

Series

02

Medium pressure pump, peak pressure 250 bar

F

Frame size BG

03

BG1

1

BG2

2

BG3

3

Series

BG1

BG2

BG3

04

Series 20 to 29 (20 to 29: unchanged installation and connection dimensions)

-

2X

Series 30 to 39 (30 to 39: unchanged installation and connection dimensions)

-

-

3X

Size

NG

05

BG1

1.7

1,7

2.2

2,2

2.8

2,8

3.2

3,2

4.1

4,1

5.0

5,0

BG2

6.3

006

8.0

008

11.0

011

13.0

013

16.0

016

19.0

019

22.0

022

BG3

20.0

020

25.0

025

32.0

032

40.0

040

Direction of rotation

06

When looking at the drive shaft

right

R

counterclockwise

L

Drive shaft

07

Parallel keyed shaft, ISO 3019-2

A

Cylindrical shaft with fitting key, ISO 3019-2 with through-drive

E

Splined shaft SAE J744 with involute tooth system according to ANSI B92.1a

J

Dihedral for claw coupling

N

Dihedral for claw coupling with through-drive

L

Conical shaft 1:5 with through-drive

1)

O

Line connections

08

Pipe thread according to ISO 228-1

01

Suction and pressure port according to SAE J518

07

Square flange connection, metric mounting thread

20

Seal material

09

FKM (fluor-caoutchouc)

V

Mounting flange

10

Special flange according to ISO 7653-1985 (for ancillary truck output)

K4

4-hole mounting flange according to ISO 3019-2 and VDMA 24560 part 1

E4

2-hole mounting flange according to ISO 3019-1

U2

2-hole mounting flange, centering diameter 32 mm (BG1), centering diameter 52 mm (BG2 and BG3)

M

2-hole mounting flange, centering diameter 50 mm

P

2-hole mounting flange, centering diameter 45.24 mm

P1

2-hole mounting flange, centering diameter 63 mm

P2

Option

11

Anti-cavitation valve

N

End cover for attachment of the next smaller frame size

K

12

Further details in the plain text

*

1) With adapter for truck ancillary drive

Type

Material number

PGF22X/011RE01VE4

R900932271

Not all variants according to the type key are possible! Please select the desired pump using the selection tables from dimensions to “Conical shaft, with through-drive” or after consultation with Bosch Rexroth! Upon request, special options are possible, for example integrated pressure relief valves.

Multiple pumps

01

02

03

04

05

06

07

08

09

10

11

12

13

P3

GF2

/

022

+

GF2

/

011

+

GF1

/

2.8

+

+

Type

01

2-fold

P2

3-fold

P3

02

Series of the 1st pump

1)

03

Size of the 1st pump

1)

04

Series of the 2nd pump

1)

05

Size of the 2nd pump

1)

06

Series of the 3rd pump

1)

07

Size of the 3rd pump

1)

Direction of rotation

08

When looking at the drive shaft

right

R

counterclockwise

L

Drive shaft of the 1st pump

09

Cylindrical shaft with fitting key, ISO 3019-2 with through-drive

E

Splined shaft SAE J744 with involute tooth system according to ANSI B92.1a

J

Dihedral for claw coupling with through-drive

L

Line connections of the 1st pump

10

Pipe thread according to ISO 228-1

01

Suction and pressure port according to SAE J518

07

Square flange connection, metric mounting thread

20

Line connections of the 2nd pump

11

Pipe thread according to ISO 228-1

01

Suction and pressure port according to SAE J518

07

Square flange connection, metric mounting thread

20

Line connections of the 3rd pump

12

Pipe thread according to ISO 228-1

01

Suction and pressure port according to SAE J518

07

Square flange connection, metric mounting thread

20

Mounting flange of the 1st pump

13

Special flange according to ISO 7653-1985 (for ancillary truck output)

K4

4-hole mounting flange according to ISO 3019-2 and VDMA 24560 part 1

E4

2-hole mounting flange according to ISO 3019-1

U2

2-hole mounting flange, centering diameter 32 mm (BG1), centering diameter 52 mm (BG2 and BG3)

M

2-hole mounting flange, centering diameter 50 mm

P

1) Detailed information see type key

Frame size

1 2 3

Size

     

1.7 2.2 2.8 3.2 4.1 5.0 6.3 8 11 13 16 19 22 20 25 32 40

Displacement

geometric

Vg

cm³

1.7 2.2 2.8 3.2 4.1 5 6.5 8.2 11 13.3 16 18.9 22 20.6 25.4 32.5 40.5

Drive speed

nmin

rpm

600 500

nmax

rpm

4500 3600 4000 3600 3000 3600 3200 3000 2500

Operating pressure, absolute

Inlet

p

bar

0.6 ... 3

Outlet

continuous

Standard liquid

pN

bar

180 210 180 210 180 210 180

Outlet

intermittent 1)

Standard liquid

pmax

bar

210 250 210 250 210 250 210

Flow 2)

qV

l/min

2.4 3.2 4.1 4.6 6 7.2 9.4 11.9 16 19.3 23.3 27.4 31.9 29.9 36.8 47.1 58.7

Power consumption

Minimum drive power required 3)

pzu

kW

0.75 1.1 1.5

Mass 4)

m

kg

0.8 0.9 1 1.1 1.3 2.1 2.2 2.4 2.6 2.7 2.9 3.1 3.3 4.1 4.5 4.9

Shaft load

Radial and axial forces (e.g. belt pulley) only after coordination

Mounting type

Flange mounting
1) Maximum 6s, at most 15% of the duty cycle, maximum 2 x 106 load cycles
2) at n = 1450 rpm, p = 10 bar, v = 30 mm2/s
3) at p ≈ 1 bar
4) For pumps with 2-hole mounting as flange version
- Frame size 2 approx. 0.9 kg heavier
- Frame size 3 approx. 1.0 kg heavier

Hydraulic fluid

Hydraulic fluid

 

Permissible hydraulic fluid 1)

Mineral oil (HL, HLP) according to DIN 51524-1 and DIN 51524-2
HEES liquids according to DIN ISO 15380
HEPR liquids according to DIN ISO 15380

Operating temperature range

Standard liquid

°C

-20 … -100

Ambient temperature range

°C

-20 … +60

Viscosity range

mm²/s

10 … 300

Admissible start viscosity

mm²/s

2000

Maximum admissible degree of contamination of the hydraulic fluid 2)

Class 20/18/15 according to ISO 4406 (c)

Admissible radial loads of the pinion shaft

Upon request
1) Other hydraulic fluids on request
2) 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.

For applications outside these parameters, please consult us!

Notice

For applications outside these parameters, please consult us. Observe our provisions according to data sheet 90220.

For applications outside these parameters, please consult us!

Frame size 1

Flow

Efficiency

Drive power

Sound pressure level

Frame size 2

Flow

Efficiency

Drive power

Sound pressure level

Frame size 3

Flow

Efficiency

Drive power

Sound pressure level

Notice

Characteristic curves measured with n = 1450 min-1; ν = 40 mm2/s; θ = 40 °C Sound pressure level measured in the sound measuring chamber according to DIN 45635, sheet 26: Distance: Microphone ‒ pump = 1 m

Frame size 1

Cylindrical shaft with fitting key DIN 6885, without through-drive

Dimensions in mm

Type

Material numbers

a

b

c

Øe

Øf

Suction port S according to ISO 228-1

Pressure port P according to ISO 228-1

PGF1-2X/

1,7

R

A

01VP1

R9000932132

29,6 mm

49,1 mm

61,1 mm

23 mm

23 mm

G1/4; 14 mm deep

G1/4; 12.5 mm deep

2,2

R

A

01VP1

R9000932133

29,6 mm

49,1 mm

61,1 mm

23 mm

23 mm

G1/4; 14 mm deep

G1/4; 12.5 mm deep

2,8

R

A

01VP1

R9000932134

30,7 mm

51,4 mm

63,4 mm

26 mm

23 mm

G3/8; 14 mm deep

G1/4; 12.5 mm deep

3,2

R

A

01VP1

R9000932135

31,5 mm

53 mm

65 mm

26 mm

23 mm

G3/8; 14 mm deep

G1/4; 12.5 mm deep

4,1

R

A

01VP1

R9000932136

33,4 mm

56,7 mm

68,7 mm

26 mm

26 mm

G3/8; 14 mm deep

G3/8; 12.5 mm deep

5,0

R

A

01VP1

R9000932137

35,2 mm

60,4 mm

72,4 mm

27 mm

26 mm

G1/2; 14 mm deep

G3/8; 12.5 mm deep

Cylindrical shaft with fitting key DIN 6885, with through-drive

Dimensions in mm

Type

Material numbers

a

c

d

Øe

Øf

Suction port S according to ISO 228-1

Pressure port P according to ISO 228-1

PGF1-2X/

1,7

R

E

01VU2

R900086159

48,6 mm

85,7 mm

79,7 mm

23 mm

23 mm

G1/4; 14 mm deep

G1/4; 12.5 mm deep

2,2

R

E

01VU2

R900086160

48,6 mm

85,7 mm

79,7 mm

23 mm

23 mm

G1/4; 14 mm deep

G1/4; 12.5 mm deep

2,8

R

E

01VU2

R900086161

49,7 mm

88 mm

82 mm

26 mm

23 mm

G3/8; 14 mm deep

G1/4; 12.5 mm deep

3,2

R

E

01VU2

R900086162

50,5 mm

89,6 mm

83,6 mm

26 mm

23 mm

G3/8; 14 mm deep

G1/4; 12.5 mm deep

4,1

R

E

01VU2

R900086163

52,4 mm

93,3 mm

87,3 mm

26 mm

26 mm

G3/8; 14 mm deep

G3/8; 12.5 mm deep

5,0

R

E

01VU2

R900086164

54,2 mm

97 mm

91 mm

27 mm

26 mm

G1/2; 14 mm deep

G3/8; 14 mm deep

Shaft for claw coupling, without through-drive, back pump

Dimensions in mm

Type

Material numbers

a

c

d

Øe

Øf

Suction port S according to ISO 228-1

Pressure port P according to ISO 228-1

PGF1-2X/

1,7

L

N

01VM

R900086147

29,6 mm

49,1 mm

61,1 mm

23 mm

23 mm

G1/4; 14 mm deep

G1/4; 12.5 mm deep

2,2

L

N

01VM

R900086148

29,6 mm

49,1 mm

61,1 mm

23 mm

23 mm

G1/4; 14 mm deep

G1/4; 12.5 mm deep

3,2

L

N

01VM

R900086150

31,5 mm

53 mm

65 mm

26 mm

23 mm

G3/8; 14 mm deep

G1/4; 12.5 mm deep

4,1

L

N

01VM

R900932131

33,4 mm

56,7 mm

68,7 mm

26 mm

26 mm

G3/8; 14 mm deep

G3/8; 12.5 mm deep

Driver

Dimensions in mm

The driver (material number R900984336) is included in the scope of delivery.

Shaft for claw coupling, with through-drive, central or back pump

Dimensions in mm

Type

Material numbers

a

b

c

d

Øe

Øf

Suction port S according to ISO 228-1

Pressure port P according to ISO 228-1

PGF1-2X/

1,7

R

L

01VM

R900086165

29,6 mm

49,1 mm

66,7 mm

60,7 mm

23 mm

23 mm

G1/4; 14 mm deep

G1/4; 12.5 mm deep

L

R900932093

2,2

R

L

01VM

R900086166

29,6 mm

49,1 mm

66,7 mm

60,7 mm

23 mm

23 mm

G1/4; 14 mm deep

G1/4; 12.5 mm deep

L

R900932094

2,8

R

L

01VM

R900932138

30,7 mm

51,4 mm

69 mm

63 mm

26 mm

23 mm

G3/8; 14 mm deep

G1/4; 12.5 mm deep

L

R900951293

3,2

R

L

01VM

R900086168

31,5 mm

53 mm

70,6 mm

64,6 mm

26 mm

23 mm

G3/8; 14 mm deep

G1/4; 12.5 mm deep

L

R900951294

4,1

R

L

01VM

R900086169

33,4 mm

56,7 mm

74,3 mm

68,3 mm

26 mm

26 mm

G3/8; 14 mm deep

G3/8; 12.5 mm deep

L

R900088913

5,0

R

L

01VM

R900086170

35,2 mm

60,4 mm

78 mm

72 mm

27 mm

26 mm

G1/2; 14 mm deep

G3/8; 12.5 mm deep

L

R900951295

Driver

Dimensions in mm

The driver (material number R900984336) is included in the scope of delivery.

Frame size 2

Shaft for claw coupling, without through-drive, back pump

Dimensions in mm

Type

Material numbers

a

b

c

Port standard

Port optional

PGF2-2X/

006

L

N

01VM

R900563948

46 mm

76 mm

87,2 mm

01

20

008

L

N

01VM

R900062364

47,8 mm

79,5 mm

90,7 mm

01

20

011

L

N

01VM

R900077364

50,5 mm

85 mm

96,2 mm

01

20

013

L

N

20VM

R900034010

53 mm

90 mm

101,2 mm

20

01

016

L

N

20VM

R900033354

55,5 mm

95 mm

106,2 mm

20

01

019

L

N

20VM

R900932120

58,5 mm

101 mm

112,2 mm

20

01

022

L

N

20VM

R900081192

61,5 mm

107 mm

118,2 mm

20

-

Port 01, pipe thread according to ISO 228-1

NG

Suction port S

Pressure port P

006, 008, 011, 013

G3/4; 16 deep

G1/2; 14 mm deep

016, 019

G1; 18 mm deep

G1/2; 14 mm deep

Driver

Dimensions in mm

The driver (material number R900981428) is included in the scope of delivery.

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

g

h

Pitch circle

G

t

M

006, 008, 011, 013, 016

20 mm

28,3±0.2 mm

40 mm

M6

10 mm

10 Nm

019, 022

26 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Shaft for claw coupling, without through-drive, back pump

Dimensions in mm

Type

Material numbers

a

b

c

d

Port standard

Port optional

PGF2-2X/

006

R

L

01VM

R900567307

46 mm

76 mm

98,2 mm

87,1 mm

01

20

L

R900066012

008

R

L

01VM

R900563291

47,8 mm

79,5 mm

101,7 mm

90,6 mm

01

20

L

R900070239

011

R

L

01VM

R900561146

50,5 mm

85 mm

107,2 mm

96,1 mm

01

20

L

R900073232

013

R

L

20VM

R900049570

53 mm

90 mm

112,2 mm

101,1 mm

20

01

L

R900058674

016

R

L

20VM

R900064718

55,5 mm

95 mm

117,2 mm

106,1 mm

20

01

L

R900983463

019

R

L

20VM

R900932243

58,5 mm

101 mm

123,2 mm

112,1 mm

20

01

L

R900983464

022

R

L

20VM

R900932186

61,5 mm

107 mm

129,2 mm

118,1 mm

20

-

L

R900983933

Port 01, pipe thread according to ISO 228-1

NG

Suction port S

Pressure port P

006, 008, 011, 013

G3/4; 16 deep

G1/2; 14 mm deep

016, 019

G1; 18 mm deep

G1/2; 14 mm deep

Driver

Dimensions in mm

The driver (material number R900981428) is included in the scope of delivery.

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

g

h

Pitch circle

G

t

M

006, 008, 011, 013, 016

20 mm

28,3±0.2 mm

40 mm

M6

10 mm

10 Nm

019, 022

26 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Shaft for claw coupling, without through-drive, back pump

Dimensions in mm

Shaft for claw coupling, without through-drive, back pump

Dimensions in mm

Type

Material numbers

a

b

c

Port standard

Port optional

PGF2-2X/

006

R

A

01VP2

R900932272

46 mm

76 mm

87,1 mm

01

20

008

R

A

01VP2

R900564037

47,8 mm

79,5 mm

90,7 mm

01

20

011

R

A

01VP2

R900568523

50,5 mm

85 mm

96,2 mm

01

20

013

R

A

20VP2

R900032712

53 mm

90 mm

101,2 mm

20

01

016

R

A

20VP2

R900032275

55,5 mm

95 mm

106,2 mm

20

01

019

R

A

20VP2

R900571401

58,5 mm

101 mm

112,2 mm

20

01

Port 01, pipe thread according to ISO 228-1

NG

Suction port S

Pressure port P

006, 008, 011, 013

G3/4; 16 deep

G1/2; 14 mm deep

016, 019

G1; 18 mm deep

G1/2; 14 mm deep

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

g

h

Pitch circle

G

t

M

006, 008, 011, 013, 016

20 mm

28,3±0.2 mm

40 mm

M6

10 mm

10 Nm

019, 022

26 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Cylindrical shaft with fitting key DIN 6885, without through-drive

Dimensions in mm

Type

Material numbers

a

c

d

Port standard

Port optional

PGF2-2X/

006

R

E

01VE4

R900932265

63 mm

115,2 mm

104,1 mm

01

20

008

R

E

01VE4

R900932266

64,8 mm

118,7 mm

107,6 mm

01

20

011

R

E

01VE4

R900932271

67,5 mm

124,2 mm

113,1 mm

01

20

013

R

E

20VE4

R900943181

70 mm

129,2 mm

118,1 mm

20

01

016

R

E

20VE4

R900932193

72,5 mm

134,2 mm

123,1 mm

20

01

019

R

E

20VE4

R900943182

75,5 mm

140,2 mm

129,1 mm

20

01

022

R

E

20VE4

R900932126

78,5 mm

146,2 mm

135,1 mm

20

-

Port 01, pipe thread according to ISO 228-1

NG

Suction port S

Pressure port P

006, 008, 011, 013

G3/4; 16 deep

G1/2; 14 mm deep

016, 019

G1; 18 mm deep

G1/2; 14 mm deep

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

g

h

Pitch circle

G

t

M

006, 008, 011, 013, 016

20 mm

28,3±0.2 mm

40 mm

M6

10 mm

10 Nm

019, 022

26 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Splined shaft, with through-drive

Dimensions in mm

Type

Material numbers

a

c

d

Port standard

Port optional

PGF2-2X/

006

R

J

01VU2

R900932265

65 mm

117,2 mm

106,1 mm

01

20

L

R900247697

008

R

J

01VU2

R900932266

66,8 mm

120,7 mm

109,6 mm

01

20

L

R900247698

011

R

J

01VU2

R900932271

69,5 mm

126,2 mm

115,1 mm

01

20

L

R900247699

013

R

J

20VU2

R900943181

72 mm

131,2 mm

120,1 mm

20

01

L

R900969259

016

R

J

20VU2

R900932193

74,5 mm

136,2 mm

125,1 mm

20

01

L

R900936173

019

R

J

20VU2

R900943182

77,5 mm

142,2 mm

131,1 mm

20

01

L

R900984300

022

R

J

20VU2

R900932126

80,5 mm

148,2 mm

137,1 mm

20

-

L

R900935718

Port 01, pipe thread according to ISO 228-1

NG

Suction port S

Pressure port P

006, 008, 011, 013

G3/4; 16 deep

G1/2; 14 mm deep

016, 019

G1; 18 mm deep

G1/2; 14 mm deep

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

g

h

Pitch circle

G

t

M

006, 008, 011, 013, 016

20 mm

28,3±0.2 mm

40 mm

M6

10 mm

10 Nm

019, 022

26 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Frame size 3

Splined shaft, with through-drive

Dimensions in mm

Type

Material numbers

a

c

d

Port standard

Port optional

PGF3-3X/

020

R

J

07VU2

R900983792

79,5 mm

145,6 mm

134,5 mm

07

20

L

R900948466

025

R

J

07VU2

R900029617

82,5 mm

151,6 mm

140,5 mm

07

20

L

R900950057

032

R

J

07VU2

R900029561

87 mm

160,6 mm

149,5 mm

07

20

L

R900984213

040

R

J

07VU2

R900931426

92 mm

170,6 mm

159,5 mm

07

-

L

R900969266

Port 07, suction and pressure port according to SAE J518

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

k

Suction port S

Pressure port P

020, 025

16 mm

1 1/4 in

3/4 in

032, 040

20 mm

1 1/4 in

3/4 in

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

n

o

Pitch circle

G

t

M

020, 025

12 mm

24,8±0.2 mm

35 mm

M6

10 mm

10 Nm

032

20 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Cylindrical shaft with fitting key DIN 6885, without through-drive

Dimensions in mm

Type

Material numbers

a

c

d

Port standard

Port optional

PGF3-3X/

020

R

E

07VE4

R900063299

71 mm

137,1 mm

126 mm

07

20

025

R

E

07VE4

R900932088

74 mm

143,1 mm

132 mm

07

20

032

R

E

07VE4

R900932112

75,5 mm

152,1 mm

141 mm

07

20

040

R

E

07VE4

R900932111

83,5 mm

162,1 mm

151 mm

07

-

Port 07, suction and pressure port according to SAE J518

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

k

Suction port S

Pressure port P

020, 025

16 mm

1 1/4 in

3/4 in

032, 040

20 mm

1 1/4 in

3/4 in

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

n

o

Pitch circle

G

t

M

020, 025

12 mm

24,8±0.2 mm

35 mm

M6

10 mm

10 Nm

032

20 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Shaft for claw coupling, without through-drive, back pump

Dimensions in mm

Type

Material numbers

a

b

c

d

Port standard

Port optional

PGF3-3X/

020

R

L

07VM

R900073539

60,5 mm

99,5 mm

126,6 mm

115,5 mm

07

20

L

R900758721

025

R

L

07VM

R900932121

63,5 mm

105,5 mm

132,6 mm

121,5 mm

07

20

L

R900960119

032

R

L

07VM

R900074369

68 mm

114,5 mm

141,6 mm

130,5 mm

07

20

L

R900034370

040

R

L

07VM

R900083281

73 mm

124,5 mm

151,6 mm

140,5 mm

07

-

L

R900058224

Port 07, suction and pressure port according to SAE J518

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

k

Suction port S

Pressure port P

020, 025

16 mm

1 1/4 in

3/4 in

032, 040

20 mm

1 1/4 in

3/4 in

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

n

o

Pitch circle

G

t

M

020, 025

12 mm

24,8±0.2 mm

35 mm

M6

10 mm

10 Nm

032

20 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Driver

Dimensions in mm

The driver (material number R900983603) is included in the scope of delivery.

Conical shaft, with through-drive

Dimensions in mm

Type

Material numbers

a

c

d

Port standard

Port optional

PGF3-3X/

020

R

O

07VK4

R900969302

71 mm

137,1 mm

126 mm

07

20

L

R900619706

025

R

O

07VK4

R900943169

74 mm

143,1 mm

132 mm

07

20

L

R900619710

032

R

O

07VK4

R900943168

78,5 mm

152,1 mm

141 mm

07

20

L

R900943167

Port 07, suction and pressure port according to SAE J518

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

k

Suction port S

Pressure port P

020, 025

16 mm

1 1/4 in

3/4 in

032, 040

20 mm

1 1/4 in

3/4 in

Port 20, square flange connection

Suction port S

Dimensions in mm

Pressure port P

Dimensions in mm

NG

n

o

Pitch circle

G

t

M

020, 025

12 mm

24,8±0.2 mm

35 mm

M6

10 mm

10 Nm

032

20 mm

38,9±0,3 mm

55 mm

M8

12 mm

25 Nm

Intended use

Internal gear pumps are intended for the set-up of hydraulic drive systems in machine and plant construction.

Technical data

The plant or machine manufacturer must ensure compliance with the admissible technical data and operating conditions. The pump itself does not contain a device to prevent operation outside the admissible data. Operating the pump outside of the admissible technical data is possible to a certain extent, however, this requires the explicit written approval by Bosch Rexroth. All specified technical performance features are average values and apply with the specified boundary conditions. In case of modifications to the basic conditions (e.g. viscosity), the technical data may change as well. Distribution corresponding to the relevant state-of-the-art is possible.

Hydraulic project planning

Bleeding option for commissioning

For Rexroth internal gear pumps PGF.-2/3X, a manual or switchable bleeding option for the initial commissioning or any re-commissioning after maintenance and repair works is to be provided. The bleeding point has to be put into the pressure line in front of the first valve or check valve. Bleeding may only be effected with a maximum counter pressure of 0.2 bar.

 

Switchable bleeding

Manually operated bleeding

Suction line

The line cross-sections have to be rated for the designed flows in a manner that an ideal suction speed of 0.6 to 1.2 m/s is achieved on average. The suction speed must not exceed a maximum value of 2 m/s.

The suction cross-sections at the pump itself are designed for the maximum flow and can therefore only be used as reference. In case of continuous operation with speeds lower than the admissible maximum speed, the suction tube diameter is to be dimensioned smaller than the suction port of the pump in accordance with the actual suction speed.

All in all, the suction line is to be designed so that the admissible inlet operating pressure is complied with. Bends and the combination of the suction pipes of several pumps are to be avoided. If a suction filter has to be used, it has to be ensured on the system side that the lowest admissible inlet operating pressure is not exceeded even when the filter is contaminated.

Please ensure air tightness of the transitions and dimensional stability of the suction tube as regards to the external air pressure.

The immersion depth of the suction pipe should be as large as possible (at least 100 mm with lowest liquid level). Dependent on the internal tank pressure, the viscosity of the operating medium and the flow ratios within the tank, no vortex must be formed even during maximum flow. Otherwise, there is the risk that air is sucked in. Return flow and leakage fluid must not be sucked in immediately again.

 

Dimensions in mm

Pressure line

With pressure lines, sufficient bursting protection of the pipes, hoses and connection elements has to be ensured. The cross-sections should be based on the maximum flow in order to avoid additional excessive load of the pump due to back pressure. Here, you must also consider the pipe losses over the entire pressure line length and other line resistances (e.g. bends, pressure filters).

Pressure limitation

The PGF internal gear pump does not comprise any device for compliance with the maximum operating pressure. Setting and limiting the admissible operating pressure has to be ensured on the system side.

The pressure relief valves necessary for that purpose are to be designed considering the maximum flow and the existing pressure increase speed so that the admissible intermittent operating pressure is not exceeded.

Pressure holding function

In the variable-speed drive, the pump can temporarily also be operated below the specified minimum speed, in the pressure holding function. The holding time and the speed necessary for that purpose results dependent on the operating viscosity and the pressure level. For the design, please contact Bosch Rexroth's technical sales department.

In the deactivated state (speed = 0), a leakage flow flows through the pump back into the tank, dependent on the load pressure. If this is to be prevented, a check valve has to be used.

When using a check valve, please observe the information on bleeding options for the commissioning.

 

Mechanical project planning

Fastening

The screws must be accessible on the machine side so that the required tightening torque can be applied. The tightening torque of the screws is based on the operating conditions and involved elements of the screw connection and has to be specified by the manufacturer in the power unit, machine or system project planning.

Tank

In the tank construction or the selection of suitable standard tanks, the following requirements are to be observed:

Selection of the largest tank volume possible, dependent on the continuous or average flow, in order to allow for the separation of air bubbles by means of sufficient duration time of the medium in the tank. The air release capacity of the hydraulic fluid used is also of importance. Provision of settling zones for the hydraulic fluid in the tank in order to allow for air release. Provision of guiding plates in order to allowing for the deposit of contamination at the tank bottom outside the pump suction area. Large dimensioning of the tank surfaces dependent on the heat output to be dissipated via the tank walls.

Required power unit functions

Hydraulic power units should at least be equipped with the following features:

Tanks, the internal pressure of which corresponds to the ambient pressure in accordance with the design, have to be equipped with breathing filters for pressure compensation purposes. The hydraulic fluid should only be filled in using filling connections excluding filling with unfiltered fluid. The ingress of contamination or humidity must be avoided. In case of use in highly contaminated environments, the tank must to this end be pre-tensioned by means of air pressure. If cleansing of the external tank side is intended or to be expected during the period of use, tank fittings for pipes, lines, or hoses have to be selected, which ensure safe sealing against external pressurization with water jet.

Place of installation and environmental conditions

With places of installation from a geodetic height of more than 1000 m, the pump is to be arranged in or below the tank or the tank is to be pre-tensioned by means of compressed air in order to comply with the admissible minimum inlet pressure. A short suction line with large cross-section has to be selected, bends should not be used.

When installing the pump more than 10 m below the tank, the reduction of the inlet pressure to the maximum admissible value has to be ensured by means of additional measures.

When operating the pump in salt-containing or corrosive environments or when pressure loading with strongly abrasive substances is possible, it has to be ensured on the system side that the shaft seal ring and the sealing area of the shaft do not make direct contact with the environment.

Drive

Electric motor + pump carrier + coupling + pump

No radial and axial forces on the pump drive shaft admissible! Motor and pump must be exactly aligned! Always use a coupling that is suitable for compensating shaft displacements!

 

 

B3

B5

V1

Pump combinations

With pump combinations it has to be ensured that on every stage, the admissible operating data for the relevant pump type are complied with. The combined pumps must all have the same direction of rotation. The pump with the highest torque, variable displacement pumps or pumps with intermittent load should be provided as first stage in the pump combination. The maximum through-drive torque must be checked by the project planner for every application. This is also true for already existing (coded) pump combinations. The total of the torques in a pump combination must not exceed the maximum drive torque.

Maximum drive torques [Nm]

Shaft

N

L

A

E

J

O

PGF1

14

14

30

30

-

-

PGF2

70

70

95

140

90

-

PGF3

140

140

-

230

230

260

Formula for drive torque

[Nm]

Legende

T

Drive torque [Nm]

Δp

Operating pressure [bar]

V

Displacement [cm³]

η

Hydraulic-mechanical efficiency

Maximum through-drive torques [Nm]

Shaft

L

E

J

PGF1

14

14

-

PGF2

70

70

70

PGF3

140

140

140

Joint aspiration is not possible. For reasons of stability, we recommend using the ISO 4-hole mounting flange according to VDMA E4 for combinations consisting of three or more pumps. Before operating pump combinations with different media, please consult Bosch Rexroth. PGF combinations are mounted without combination part and are not sealed towards each other.

Selection

The shaft design of the front pump must be E, J or L. The shaft design of the medium pump must be L. The shaft design of the back pump must be N. If a pump of the next smaller frame size is to be attached, the first pump must have the designation K at the end (e.g. PGF3 + PGF2 ⇒ front pump: PGF3-3X/032RJ07VU2K)

Dimensions

The dimensions of the connections correspond to those of single pumps (see Dimensions). The overall length of the pump combination results from the addition of the dimensions “d” of the single pumps (see Dimensions) With the combination of PGF2 and PGF1, the length of the assembly of PGF2 (dimension d) increases by 4.5 mm. With the combination of PGF3 and PGF2, the length of the assembly of PGF3 (dimension d) increases by 2 mm. With the combination of PGF3 and PGF1, the length of the assembly of PGF3 (dimension d) increases by 12.5 mm.

 

 

Maintenance schedule and operational safety

 

For safe operation and a long life cycle of the pump, a maintenance schedule has to be developed for the power unit, the machine, or the system. The maintenance schedule must ensure that the intended or admissible operating conditions of the pump are complied with over the entire period of use.

In particular, compliance with the following operating parameters has to be ensured:

The required oil cleanliness The operating temperature range The filling level of the operating medium

Furthermore, the pump and the system have to be checked for modifications of the following parameters on a regular basis:

Vibrations Noise Temperature difference pump – fluid in the tank Foam formation in the tank Leak-tightness

Modifications of these parameters indicate wear of components (e.g. drive motor, coupling, pump, etc.). The cause must be identified and remedied immediately.

In order to achieve high operational safety of the pump in the machine or system, we recommend checking the parameters mentioned above continuously and automatically and shutting the system off automatically in case of modifications exceeding the usual fluctuations in the intended operating range.

Plastic components of drive couplings should be replaced regularly, however, after 5 years at the latest. The relevant manufacturer's specifications must be considered and be given priority.

For preventive maintenance of the pump, we recommend having the seals replaced after a maximum operating time of 5 years by an authorized Bosch Rexroth service company.

 

Accessories

 

Pump safety block

For limiting the operating pressure and for the pump circulation at zero pressure, we recommend our pump safety blocks type DBA… according to data sheet 25890.

Automatic bleeding during commissioning is, however, not possible via DBA blocks. In this connection, we recommend separate, manual bleeding.