PGH4-2X/040RE11VU2

Manufacturer: Bosch Rexroth

Material #: R900086321

Model : PGH4-2X/040RE11VU2

***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 PGH4-2X/040RE11VU2 (R900086321) is a high-quality hydraulic pump designed for efficient and reliable operation. This internal gear pump features gap compensation with a constant displacement, ensuring high efficiency even at low speeds and viscosities. Its robust construction includes a housing, bearing cover, internal gear, pinion shaft, plain bearings, axial washers, end cover, mounting flange, stop pin, and a segment filler element that comprises the segment, segment support, and seal rolls. The pump operates by utilizing a hydrodynamically supported pinion shaft to drive the internal gear. It offers an increased volume in the suction range over an angle of approximately 180 degrees to facilitate fluid flow into the chambers. The unique design of the sickle-shaped segment filler element divides the suction and pressure chambers effectively. The axial compensation force ensures minimal longitudinal gaps between rotating and fixed parts for optimal sealing of the pressure chamber. Radial compensation is achieved through forces acting on the segment filler elements dependent on operating pressure to maintain an almost leakage-free seal between internal gear, segment filler element, and pinion shaft. The involute tooth system of the gears contributes to low flow and pressure pulsation which in turn results in low operating noise. The PGH4-2X/040RE11VU2 pump's hydrodynamic and hydrostatic mounting accommodates forces on both the pinion shaft through lubricated radial plain bearings and on the internal gear through hydrostatic bearing support. This pump is capable of handling broad viscosity and speed ranges with its fixed displacement design. It can be used in various configurations as it is compatible with all frame sizes and can be combined with other pumps such as internal gear pumps, radial piston pumps, and external gear pumps. With its maximum operating pressure bar rating and maximum displacement cm³/u specifications (not provided), this Bosch Rexroth hydraulic pump stands out for its versatility and performance in demanding applications.

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Fixed displacement Low operating noise Low flow pulsation High efficiency also at low speed and viscosity due to sealing gap compensation Suitable for broad viscosity and speed ranges All frame sizes and sizes can be arbitrarily combined Can be combined with internal gear pumps, radial piston pumps and external gear pumps

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

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

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
Operating temperature range	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

Efficiency

Drive power

Sound pressure level

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

Frame size 2

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

Dimensions in mm

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

Partial view pressure port P

Dimensions in mm

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

Splined shaft SAE J744

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

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