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BOSCH REXROTH
PGH2-2X/006LE07VU2
R900961547
Gear Pumps

Gear pumps: PGH2.-2x/

$1,705.00

BOSCH REXROTH

MATERIAL:  R900961547

SUMMARY:  Gear pumps: PGH2.-2x/

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technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Set-up

Hydraulic pumps of type PGH are gap-compensated internal gear pumps with constant displacement.

They basically comprise of housing (1.1), bearing cover (1.2), internal gear (2), pinion shaft (3), plain bearings (4), axial washers (5), end cover (6), mounting flange (7) and stop pin (8), as well as the segment filler element (9) consisting of segment (9.1), segment support (9.2) and the seal rolls (9.3).

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. 90° in the suction range. An underpressure results and fluid flows into the chambers.

The sickle-shaped segment filler element (9) 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

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

The axial compensation force FA takes effect in the area of the pressure chamber and is generated with the pressure field (10) 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

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

The radial compensation force FR acts on segment (9.1) and segment support (9.2).

Dependent on the operating pressure, the two segment filler elements (9.1) and (9.2) are pressed against the head diameters of pinion shaft (3) and internal gear (2).

The area ratios and the position of the seal rolls (9.3) between the segment and segment support are designed so that an almost leakage gap-free sealing between internal gear (2), segment filler element (9) and pinion shaft (3) is achieved.

Spring elements under the seal rolls (9.3) 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 (11).

Gear tooth system

The toothing 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.

PGH-type hydraulic pumps are gap-compensated internal gear pumps with fixed displacement. The hydrodynamically mounted pinion shaft drives the internal gear. The pinion shaft and internal gear tooth clearances opening in the suction range suck in the hydraulic fluid and transport it to the pressure range. The suction and pressure range are separated by the radial compensation elements and the tooth engagement between the internal gear and pinion shaft.

01

02

03

04

05

06

07

08

09

10

11

PG

H

2X

/

07

U2

Type

01

Internal gear pump, fixed displacement, gap-compensated

PG

Series

02

High-pressure pump, peak pressure 350 bar

H

Frame sizes BG

03

BG2

2

BG3

3

Component series

04

Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions)

2X

Sizes

05

BG2

5

005

6

006

8

008

BG3

11

011

13

013

16

016

Directions of rotation

06

Viewed on drive shaft

right

R

counterclockwise

L

Drive shafts

07

Cylindrical shaft with fitting key, DIN 6885

E

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

16-4 (A) 9T 16/32DP

R

19-4 11T 16/32DP

S

Line connections

08

Suction and pressure port according to SAE, pressure port standard pressure series

07

Seals

09

FKM (fluor-caoutchouc)

V

FKM (fluorocarbon rubber), shaft seal ring made of NBR (nitrile rubber)

1)​

W

Mounting flange

10

SAE 2-hole

U2

11

Further details in the plain text

1) For HFC hydraulic fluids

Order example

PGH3-2X/016RE07VU2

Material number

R900951305

Not all variants according to the type key are possible! Please select the desired pump using the selection tables (dimensions) or after consultation with Bosch Rexroth.

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

/

+

/

+

/

+

+

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

Viewed on drive shaft

right

R

counterclockwise

L

Drive shaft of the 1st pump

09

Cylindrical shaft with fitting key, DIN 6885

E

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

16-4 (A) 9T 16/32DP

R

19-4 11T 16/32DP

S

Line connection of the 1st pump

10

Suction and pressure port according to SAE, pressure port standard pressure series

07

Drive shaft of the 2nd pump

2)

11

Cylindrical shaft with fitting key, DIN 6885

A

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

16-4 (A) 9T 16/32DP

J

R

Line connection of the 2nd pump

12

Suction and pressure port according to SAE, pressure port standard pressure series

07

Drive shaft of the 3rd pump

2)

13

Cylindrical shaft with fitting key, DIN 6885

A

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

16-4 (A) 9T 16/32DP

J

R

Line connection of the 3rd pump

14

Suction and pressure port according to SAE, pressure port standard pressure series

07

Mounting flange of the 1st pump

15

SAE 2-hole

2)

U2

1) Detailed information see type key
2) See table Back pump of dimensions

Frame size

2 3

Size

     

5 6 8 11 13 16

Displacement

geometric

Vg

cm³

5.24 6.5 8.2 11 13.3 16

Drive speed

nmin

rpm

600

nmax

rpm

3000

Operating pressure, absolute

Inlet 1)

p

bar

0.8 ... 2

Outlet

continuous

Standard liquid

pN

bar

315

Special fluid 2)

pN

bar

210

Outlet

intermittent

Standard liquid

pmax

bar

350 3) 350

Special fluid 2)

pmax

bar

230

Flow 4)

qV

l/min

7.5 9.3 11.8 15.8 19.1 23

Mass

m

kg

4.3 4.4 4.6 4.8 5 5.3

Shaft load

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

Mounting type

Flange mounting
1) Short-time, during start 0,6 bar
2) For special fluids, observe the restrictions of the technical data!
3) Maximum 10 s, at most 50 % of the duty cycle
4) at n = 1450 rpm, p = 10 bar, v = 45 mm2/s

Hydraulic fluid

Hydraulic fluid

 

Permissible hydraulic fluid

Mineral oil (HLP) to DIN 51524-2

Special fluid 1)

HEES liquids according to DIN ISO 15380
Flame-resistant, water-free hydraulic fluid HFD-U according to VDMA 24317
Water polymer solutions HFC according to DIN EN ISO 12922

Operating temperature range

Standard liquid

°C

-10 … +80

Special fluid

°C

-10 … +50

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)
1) Seal design W
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!

Average values of frame sizes 2 and 3

Flow

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Efficiency

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Drive power

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Sound pressure level

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Notice

Characteristic curves measured with n = 1450 min-1; ν = 41 mm2/s; θ = 50 °C Sound pressure level measured in the sound measuring chamber according to DIN 45635, sheet 26;

Distance: Microphone ‒ pump = 1 m

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Frame size 2

With cylindrical shaft or splined shaft SAE J744 and SAE mounting flange 82‒2

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/
1) With multiple pumps, the combination part will start from here
2) The figure shows pumps with clockwise rotation; with pumps with counterclockwise rotation, the pressure port is on the opposite side!

Partial view suction port S

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Partial view pressure port P

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Type

Material numbers

L1

L2

L3

L4

Suction port S

2)

Pressure port P

2)

PGH2-2X/

005

R 1)

E

07VU2

R900968999

110 mm

54,2 mm

89,5 mm

41 mm

1/2 in 344,7 bar

1/2 in 344,7 bar

L

R900703725

R 1)

R

07VU2

R900972378

31,5 mm

L

R900703727

006

R 1)

E

07VU2

R900951301

112,5 mm

55,5 mm

92 mm

41 mm

1/2 in 344,7 bar

1/2 in 344,7 bar

L

R900961547

R 1)

R

07VU2

R900961549

31,5 mm

L

R900961550

008

R 1)

E

07VU2

R900951302

116 mm

57,3 mm

95,5 mm

41 mm

1/2 in 344,7 bar

1/2 in 344,7 bar

L

R900961548

R 1)

R

07VU2

R900961551

31,5 mm

L

R900961552

1) Preferably available
2) Standard pressure series

Cylindrical shaft with fitting key DIN 6885

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Splined shaft SAE J744

R - 16-4 (A) in 9T 16/32DP1)2)
Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/
1) Suitable as central and back pump for multiple pumps
2) Involute tooth system according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5

Frame size 3

With cylindrical shaft and SAE mounting flange 101‒2

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/
1) With multiple pumps, the combination part will start from here
2) The figure shows pumps with clockwise rotation; with pumps with counterclockwise rotation, the pressure port is on the opposite side!

Partial view suction port S

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Partial view pressure port P

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Type

Material numbers

L1

L2

L3

L4

Suction port S

2)

Pressure port P

2)

PGH3-2X/

011

R 1)

E

07VU2

R900951303

128 mm

66,5 mm

107,5 mm

41 mm

1 in 208,6 bar

1/2 in 344,7 bar

L

R900961553

013

R 1)

E

07VU2

R900951304

133 mm

69 mm

112,5 mm

41 mm

1 in 208,6 bar

1/2 in 344,7 bar

L

R900961554

016

R 1)

E

07VU2

R900951305

138 mm

71,5 mm

117,5 mm

41 mm

1 in 208,6 bar

1/2 in 344,7 bar

L

R900961555

1) Preferably available
2) Standard pressure series

Cylindrical shaft with fitting key DIN 6885

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

With splined shaft SAE J744 and SAE mounting flange 82‒2

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/
1) With multiple pumps, the combination part will start from here
2) The figure shows pumps with clockwise rotation; with pumps with counterclockwise rotation, the pressure port is on the opposite side!

Partial view suction port S

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Partial view pressure port P

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Type

Material numbers

L1

L2

L3

L4

Suction port S

2)

Pressure port P

2)

PGH3-2X/

011

R 1)

R

07VU2

R900961556

121,5 mm

60 mm

101 mm

31,5 mm

1 in 206,8 bar

1/2 in 344,7 bar

L

R900961559

R

S

07VU2

R901267181

37 mm

013

R 1)

R

07VU2

R900961557

126,5 mm

62,5 mm

106 mm

31,5 mm

1 in 206,8 bar

1/2 in 344,7 bar

L

R900961560

R

S

07VU2

R901281697

37 mm

016

R 1)

R

07VU2

R900961558

131,5 mm

65 mm

111 mm

31,5 mm

1 in 206,8 bar

1/2 in 344,7 bar

L

R900961561

R

S

07VU2

R901281698

37 mm

1) Preferably available
2) Standard pressure series

Splined shaft SAE J744

R - 16-4 (A) in 9T 16/32DP1)2)
Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/
1) Suitable as central and back pump for multiple pumps
2) Involute tooth system according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5

S - 19-4 in 11T 16/32DP1)

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/
1) Involute tooth system according to ANSI B92.1a, 30° pressure angle, flat root, side fit, tolerance class 5

Multiple pumps

All internal gear pumps of type PGH can be combined, every pump is equipped with an output gear tooth system. The combination possibilities and die material numbers of the required combination parts are available in the following table.

Back pump

Front pump

PGH2-2X

PGH3-2X

PGH2-2X/...R...U2

R900886137

R900886137

PGH3-2X/...R...U2

R900886137

R900886137

PGP2-2X/...J...U2

R900886137

R900886137

PGF2-2X/...J...U2

R900886137

R900886137

AZPF...RR...B

R900886137

R900886137

PR4-1X...WA

R900886137

R900886137

The dimensional drawings show the front pump and the combination part.1)

PGH2/PGH3

PGH2 with combination part for PGH2, PGH3, PGF2, PGP2, AZPF
Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

PGH2/PGH3 + R4-Mini

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/
1) Dimensions of the single pumps see Dimensions or the corresponding data sheets of the back pump.

SAE connection flanges

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

PGH

Flange

Material number1) for flange with

Dimensioning

Suction flange

Pressure flange

NG, pressure

Welded connection

Threaded connection

2)

B1

B2

H1

H2

D1

D2

D3

D4

PGH2/005/ 006/008

PGH2/005/ 006/008
PGH3/011/ 013/016

1/2 in 344,7 bar

R900026298

R900024200

38,1 mm

54 mm

17,5 mm

46 mm

20 mm

14 mm

G1/2

M8 x 30

PGH3/011/013/016

1 in 206,8 bar

R900012937

R900014154

52,4 mm

70 mm

26,2 mm

59 mm

35 mm

27 mm

G1

M10 x 35

1) The material numbers comprise the flange, the O-ring (NBR) and the mounting screws.
2) Pipe thread “G” according to DIN EN ISO 228/1

Pump safety block

For limitation of the operating pressure or (and) for the solenoid-actuated unloading of the operating pressure, we recommend our pump safety blocks according to data sheets 25880 and 25891.

Comprehensive information and suggestions are contained in the Hydraulics Trainer, volume 3 "Project planning information and design of hydraulic systems".

When using internal gear pumps, a manual, switchable or automatic bleeding option must moreover be provided. The bleeding point for manual bleeding must be provided in the pressure line in front of the first valve or check valve so that depressurized bleeding is possible.

Technical data

All specified technical data depend on production tolerances and are valid at certain boundary conditions.

Please note that consequently, fluctuations are possible and that with certain boundary conditions (e.g. viscosity), the technical data may also change.

Characteristic curves

When designing the drive motor, please observe the maximum application parameters possible shown by the presented characteristic curves.

Sound pressure level

The shown values for sound pressure level on characteristic curves have been measured based on DIN 45635, sheet 26.

That means that only the sound emission of the pump is shown. Environmental influences (place of installation, piping, etc.) have not been considered.

These values are in each case only valid for one pump.

With internal gear pumps, the excitation of valves, pipelines, machine parts, etc. is very low due to the little flow pulsation (approx. 2 to 3%).

With unfavorable influences, the sound pressure level at the place of installation of the power unit may, however, still be 5 to 10 db(A) higher than the values of the pump itself.

Multiple pump

The same general technical data apply as for single pumps (see Technical data). The combined pumps must all have the same direction of rotation. The pump with the largest torque should be intended as first pump. The maximum through-drive torque must be checked by the project planner for every application. This is also true for already existing (coded) multiple pumps. The total of the torques in a multiple pump must not exceed the maximum drive torque. Joint aspiration is not possible. Before operating pump combinations with different hydraulic fluids, please consult Bosch Rexroth. Medium and back pumps must be equipped with drive shafts version “R” (geared). The drive torque of a pump stage is calculated as follows: technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Legende

T​

Torque [Nm]

Δp

Operating pressure [bar]

V

Displacement [cm³]

η

Hydraulic-mechanical efficiency

Maximum admissible torques [Nm]

Type

Drive torque

Drive torque

Cyl. shaft E

Splined shaft R

Splined shaft S

PGH2

100

80

155

75

PGH23

110

80

155

75

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

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 connections

Remove the protective plug at the pump. Select the inner width of the pipes according to the connections (suction speed 1 to 1.5 m/s). For the inlet pressure refer to the Technical data Pipelines and fittings must be carefully cleaned before assembly.

Proposal for piping layout

Dimensions in mm

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/ Return fluid must not be directly sucked in again under any circumstances, i.e. select the largest distance possible between suction and return line. Suction line and return flow outlet must always lie clearly below the oil level. Ensure suction-tight assembly of the pipelines.

Filter

Use return flow or pressure filter if possible.

(Only use suction filters in connection with underpressure switch / clogging indicator).

Hydraulic fluid

Please observe our provisions according to data sheet 90220. We recommend brand hydraulic fluids. Different hydraulic fluid types must not be mixed as this might result in degradation and deterioration of the lubricity. According to the operating conditions, the hydraulic fluid must be renewed at certain time intervals. In this connection, it is also necessary to clean the hydraulic fluid tank from residues.

Drive

Electric motor + pump carrier + coupling + pump

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/ 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! Avoid axial forces when attaching the coupling, i.e. do not assemble it using impact tools or by pressing it on! Use an internal thread of the drive shaft! technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Installation positions

B3

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

B5

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

V1

technical illustration-PGH2-2X/006LE07VU2-Gear pumps: PGH2.-2x/

Preparation

Check whether the system has been assembled carefully and properly. Only fill in hydraulic fluid through filters with the required minimum retention rate. Completely fill the pump with hydraulic fluid through the suction or pressure pipe. Check the direction of rotation of the motor for compliance with the direction of rotation according to the pump type.

Bleeding

Manually open the bleed port at the system or switch to depressurized circulation according to the operating instructions of the system. During the bleeding, depressurized discharge of entrapped air must be ensured. To bleed the pump, switch the motor on and immediately off again (jog mode). This process is to be repeated until complete bleeding of the pump is ensured. Close the manually opened bleed port again.

Commissioning

If complete bleeding of the pump has been ensured, switch on the motor. Let the pump run at zero pressure until the system is completely bled. For system air bleeding, observe the operating instructions of the system. Commission the system according to the operating instructions of the system and load the pump. After some operating time, check the hydraulic fluid in the tank for bubble or foam formation at the surface.

Operation

During operation, look out for changes in the noise characteristic. Due to the heating of the hydraulic fluid, slightly increasing noises are normal. A considerably increase in noise or short-time stochastic noise changes may be an indication of sucked in air. If suction pipes are too short or the filling level heights of the hydraulic fluid are too low, air may also be sucked in through a vortex. Changes in operating speeds, temperatures, increasing noises or power consumption are an indication of wear or damage at the system or the pump.

Re-commissioning

Check the pump and system for leakage. Leaks are an indication of leakage below the hydraulic fluid level. An increased hydraulic fluid level in the tank is an indication of leakage above the hydraulic fluid level. If the pump is arranged above the hydraulic fluid level, the pump may run empty due to leakage, e.g. a worn shaft seal ring. In this case, the system must be bled again upon re-commissioning. Initiate the repair. After repair and maintenance works, bleeding is again necessary. If the system is intact, switch on the motor.

General information

The pumps delivered by us have been checked for function and performance. The warranty only applies to the supplied configuration. Repair works may only be carried out by the manufacturer or their authorized dealers and agencies. The claim to warranty expires if the product is incorrectly repaired, assembled, commissioned and operated, not used as intended and/or handled improperly. Opening the internal gear pump and following an extension or a modification, the claim to warranty expires.

Notes!

Assembly, maintenance and repair of the pump may only be carried out by authorized, trained and instructed personnel. Pump may only be operated with the admissible data (see Technical data). The pump may only be operated if it is in an unobjectionable condition. For all works at the pump, depressurize the system! Unauthorized modifications or changes which affect the safety and function are not admissible! Apply protective devices (e. g. coupling guard) and/or do not remove existing protective devices! Always ensure tight seat of all mounting screws! (Observe the specified tightening torque) The generally valid safety and accident prevention regulations must be imperatively complied with!