PVQ21-1X/040-040RA15UUMB

Manufacturer: Bosch Rexroth

Material #: R978918941

Model : PVQ21-1X/040-040RA15UUMB

***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 PVQ21-1X/040-040RA15UUMB (R978918941) is a high-performance hydraulic vane pump known for its constant displacement feature and robust design tailored for mobile applications. This model stands out with its double-eccentric stator ring, which creates two pressure chambers opposite two suction chambers, ensuring hydraulic unloading of the shaft and only requiring it to transmit torque. The innovative design of the rotor accommodates vanes that are centrifugally pressed against the stator ring, enhancing efficiency and reducing wear by partially unloading in the suction range. Maintenance is streamlined with this model, as the pump insert—comprising the rotor, vane, stator ring, and control plates—can be easily removed without detaching the housing from the pump carrier. The control plates are uniquely engineered to compensate for thermal expansion and respond adeptly to pressure changes. This results in balanced counter pressure chambers that maintain optimal clearance between the rotor and flexible discs for superior volumetric efficiency. This model also offers flexibility in assembly configurations; double pumps can be created by mounting two pump kits on a single shaft, featuring a shared suction port but separate oil outlets for each kit. It's important to note that double pumps cannot be formed using kits of identical frame sizes. Key features include a long bearing life due to hydraulic shaft relief, low wear with hydraulically unloaded vanes, minimal operating noise levels, easy-to-service exchangeable cartridges, and high overall efficiency. Users can select from various options such as drive direction (clockwise or counterclockwise), drive shaft type (cylindrical or splined), and separate positioning of pressure ports for each kit in double pump configurations. The compact build of this unit further enhances its appeal for space-conscious applications.

$2,835.00 USD

More are expected on February 20, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as February 20, 2025 when ordered in

This product is eligible for factory repair.

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Fixed displacement Long bearing life through hydraulic relief of the shaft Low wear due to hydraulically unloaded vanes Low operating noise Easy to service due to exchangable pump cartridges Good efficiency Position of the pressure ports can be chosen Drive direction of rotation clockwise or counterclockwise Drive shaft optionally cylinderical or splined Double pump Very compact build Position of the pressure ports can be chosen separately

Hydraulic pumps of type PVQ are vane pumps with constant displacement. The rotor (2) running in a stator ring (3) is located on the tooth profile of the drive shaft (1). The slots of the rotor accommodate the vanes (4) which are pressed against the internal surfaces of the stator ring by the centrifugal force upon rotation of the rotor. The displacer chambers are laterally sealed by the control plates (5). Due to the double-eccentric design of the stator ring, there are in each case two pressure chambers opposite of two suction chambers, which provides for hydraulic unloading of the shaft. So it only has to transmit the torque. The vanes are partially unloaded upon passage through the suction range. This unloading has a wear-reducing effect and ensures high efficiency. By simply removing the cover (6), the pump insert (consisting of rotor, vane, stator ring and control plates) can be removed without the need of removing the housing (7) from the pump carrier. This allows for fast maintenance and repair of the pump. Due to the structural design, type PVQ is particularly suitable for mobile applications. The special design of the control plates allows for compensation of the thermal expansion of the rotor and perfect counteraction to sudden pressure changes. Due to the division of the control plates into flexible discs (7) and cover plates (8), counter pressure chambers (9) are formed which are balanced against the pressure in the displacer. This ensures the perfect play between rotor and flexible discs and thus best volumetric efficiencies.

Double pumps are formed by installing two pump installation kits on one joint shaft. The oil inlet is realized by one joint suction port in the central housing (10). The oil outlet is realized separately by both pump installation kits. For the front pump installation kit, the pressure port is located in the flange housing, for the back pump installation kit in the cover. The larger pump installation kit is always located on the flange housing side. Pump installation kits of the same frame size cannot be used as double pumps.

01	02		03		04	05	06	07	08	09	10	11	12	13
PVQ		–	1X	/				15						*

Pump type
01	Mobile version		PVQ
Frame size
02	See selection table (e.g. single pump = 2, double pump = 52)
Component series
03	Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions)		1X
Displacement
04	See selection table (e.g. 55.2 cm3 = 055)
Direction of rotation
05	clockwise		R
	counterclockwise rotation		L
Shaft end version
06	Cylindrical drive shaft (standard)		A 1)
	Cylindrical drive shaft (reinforced version) only BG2 to B54		B
	Multi-spline shaft		J
Line connection
07	Suction and pressure port: SAE flange connection, mounting thread UNC		15
Position of the pressure connection at the flange (looking at the cover)
08	top (0° from the input)		D
	right (90° to the right of the input)		R
	counterclockwise (90° to the left of the input)		L
	bottom (180° from the input)		U
Position of the pressure connection at the cover (looking at the cover), only with double pumps
09	BG21, 41, 42, 51, 52	top (45° from the input)	D
		right (135° to the right of the input)	R
		counterclockwise (45° to the left of the input)	L
		bottom (135° to the left of the input)	U
	BG54	top (0° from the input)	D
		right (90° to the right of the input)	R
		counterclockwise (90° to the left of the input)	L
		bottom (180° from the input)	U
Seal material
10	NBR seals		M
	FKM seals		V
Flange design
11	BG1, 2, 21	101-2 (SAE-B)	B
	BG4, 5, 41, 42, 51, 52, 54	127-2 (SAE-C)	C
Through-drive
12	Non through-drive		no code
	82-2, 16-4 (SAE-A, 9T)		K01
	101-2, 22-4 (SAE-B, 13T)		K02
	127-2, 32-4 (SAE-C, 14T)		K07
Additional details
13	Further details in the plain text

1)	Not available for through-drive pumps

Order example

Single pump: Industrial version (also as mobile version)

PVV 2-1X/055RA15DMB

Double pump: Mobile version (also as industrial version)

PVQ 52-1X/154-068RB15DDMC

Selection table

Single pump without through-drive			Single pump with through-drive
Frame size	Displacement Frame size		Frame size	Displacement
1	18 cm3	= 018	2	40,1 cm3	= 040
	27,4 cm3	= 027		45,4 cm3	= 045
	36,4 cm3	= 036		55,2 cm3	= 055
	39,5 cm3	= 040		60,0 cm3	= 060
	45,9 cm3	= 046		67,5 cm3	= 068
2	40,1 cm3	= 040	4	69,0 cm3	= 069
	45,4 cm3	= 045		81,6 cm3	= 082
	55,2 cm3	= 055		97,7 cm3	= 098
	60,0 cm3	= 060		112,7 cm3	= 113
	67,5 cm3	= 068		121,6 cm3	= 122
4	69,0 cm3	= 069	5	138,6 cm3	= 139
	81,6 cm3	= 082		153,5 cm3	= 154
	97,7 cm3	= 098		162,2 cm3	= 162
	112,7 cm3	= 113		183,4 cm3	= 183
	121,6 cm3	= 122		193,4 cm3	= 193
5	138,6 cm3	= 139
	153,5 cm3	= 154
	162,2 cm3	= 162
	183,4 cm3	= 183
	193,4 cm3	= 193

Selection table

Double pump
Frame size	flange-side		cover-side
Frame size	Displacement
21	40,1 cm3	= 040	18 cm3	= 018
	45,4 cm3	= 045	27,4 cm3	= 027
	55,2 cm3	= 055	36,4 cm3	= 036
	60,0 cm3	= 060	39,5 cm3	= 040
	67,5 cm3	= 068	45,9 cm3	= 046
41	69,0 cm3	= 069	18 cm3	= 018
	81,6 cm3	= 082	27,4 cm3	= 027
	97,7 cm3	= 098	36,4 cm3	= 036
	112,7 cm3	= 113	39,5 cm3	= 040
	121,6 cm3	= 122	45,9 cm3	= 046
42	69,0 cm3	= 069	40,1 cm3	= 040
	81,6 cm3	= 082	45,4 cm3	= 045
	97,7 cm3	= 098	55,2 cm3	= 055
	112,7 cm3	= 113	60,0 cm3	= 060
	121,6 cm3	= 122	67,5 cm3	= 068
51	138,6 cm3	= 139	18 cm3	= 018
	153,5 cm3	= 154	27,4 cm3	= 027
	162,2 cm3	= 162	36,4 cm3	= 036
	183,4 cm3	= 183	39,5 cm3	= 040
	193,4 cm3	= 193	45,9 cm3	= 046
52	138,6 cm3	= 139	40,1 cm3	= 040
	153,5 cm3	= 154	45,4 cm3	= 045
	162,2 cm3	= 162	55,2 cm3	= 055
	183,4 cm3	= 183	60,0 cm3	= 060
	193,4 cm3	= 193	67,5 cm3	= 068
54	138,6 cm3	= 139	69,0 cm3	= 069
	153,5 cm3	= 154	81,6 cm3	= 082
	162,2 cm3	= 162	97,7 cm3	= 098
	183,4 cm3	= 183	112,7 cm3	= 113
	193,4 cm3	= 193	121,6 cm3	= 122

	01	02		03		04	05	06
INSTALLATION KIT	PVQ		–	1X	/

Pump type
01	Industrial version		PVQ
Frame size
02	Frame Size 1		1
	Frame Size 2		2
	Frame size 4		4
	Frame size 5		5
Component series
03	Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions)		1X
Size / displacement
04	Frame Size 1	18,0 cm3	018
		27,4 cm3	027
		45,4 cm3	036
		39,5 cm3	040
		45,9 cm3	046
	Frame Size 2	40,1 cm3	040
		45,4 cm3	045
		55,2 cm3	055
		60,0 cm3	060
		67,5 cm3	068
	Frame size 4	69,0 cm3	069
		81,6 cm3	082
		97,7 cm3	098
		112,7 cm3	113
		121,6 cm3	122
	Frame size 5	138,6 cm3	139
		153,5 cm3	154
		162,2 cm3	162
		183,4 cm3	183
		193,4 cm3	193
Direction of rotation
05	clockwise		R
	counterclockwise rotation		L
06	Installation kit for single pumps or flange-side for double pump		no code
	Installation kit for cover-side installation in double pumps		D

Frame size				1					2					4					5
Size				18	27	27	27	46	40	45	55	60	68	69	82	98	113	122	139	154	162	183	193
Component series				1X
Mounting type				Flange mounting according to SAE J744
Line connections				SAE flange design (mounting thread: UNC)
Installation position				Any, inlet port at top preferred
Shaft load				Radial and axial forces cannot be transmitted
Direction of rotation				Drive direction of rotation clockwise or counterclockwise
Drive				Direct, coaxial drive
Drive speed 1) 2)		n	rpm	600 ... 2,700							600 ... 2,500						600 ... 2,400		600 ... 2,200
Displacement		Vg	cm³	18	27.4	36.4	39.5	45.9	40.1	45.4	55.2	60	67.5	69	81.6	97.7	112.7	121.6	138.6	153.5	162.2	183.4	193.4
Drive power 3)		Pmax	kW	1.1	1.5	2.2					3		4			5.5		7.5			11
Flow, max. 4)		qV	l/min	26	39	53	59	70	59	66	80	89	100	101	120	141	167	177	203	223	234	267	285
Operating pressure, absolute	Inlet 5)	pmin-max	bar	0.83 ... 2.4 6)										0.83 ... 2.4					0.83 ... 2.4 6)
	Outlet	pmax	bar	210			160	140	210										175
	Pressure peak	pmax		At most 10 % over the max. permanent output pressure; not longer than 0.5 s
Mass 7)		m	kg	12					14.8					23					34

1)	At 1 bar inlet pressure
2)	If phosphoric acid esters (HFD-R) are used, adm. nmax = 1200 rpm
3)	At Δp ≈ 0 bar, n ≈ 1450 rpm
4)	at n = 1500 rpm, p = 0,7 bar, v = 25 mm2/s
5)	Recommended: 1 ... 1,35 bar
6)	If liquids containing water and phosphoric acid esters are used, at least 0,9 bar
7)	Single pump without through-drive

Hydraulic fluid

Permissible hydraulic fluid 1)		Mineral oil (HLP) to DIN 51524-2
Hydraulic fluid temperature range 2)	°C	-10 … +70
Viscosity range	mm²/s	13 … 860
Maximum admissible degree of contamination of the hydraulic fluid 3)		Class 20/18/15 according to ISO 4406 (c)

1)	For more information and data on the use of other hydraulic fluids please contact us.
2)	Observe the admissible viscosity range!
3)	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!

The specified values for the max. drive speed apply to an absolute pressure at the input of 1 bar.

Depending on the absolute pressure at the input, the admissible max. speed must be corrected according to the following diagram.

BG1; BG2; BG4; BG21; BG41; BG42

BG5; BG51; BG52; BG54

Drive torque (measured with ν = 41 mm2/s; ϑ = 50 °C)

Sound pressure level measured in the low-noise chamber according to DIN 45635 part 26.

Distance microphone - pump = 1 m. ν = 41 mm2/s; n = 1500 and ϑ = 50 °C

BG1

BG2

BG4

BG5

The sound pressure levels for double pumps are - on the average - 1 to 3 db(A) higher than the values for single pumps.

Drive power (measured with ν = 41 mm2/s; ϑ = 50 °C)

n = 1500 min-1

n = 1800 min-1

Displacement, speed-dependent (measured with ν = 41 mm2/s; ϑ = 50 °C; p = 7 bar)

Double pump

Single pump

Single pump PVV / PVQ, BG1

Dimensions in mm

1	Suction port SAE 1 1/2“
2	Pressure connection SAE 3/4"
3	cylindrical drive shaft

Shaft end for BG1

Version "A"

Cylindrical drive shaft (standard)
4 fitting key ▢ 4.76 x 31.8
Admissible torque 250 Nm
Dimensions in mm

Version J

Multi-spline shaft SAE-B 7/8”
13 teeth 16/32DP
Tooth thickness t = 2.261
Admissible torque 316 Nm
Dimensions in mm

Single pump PVV / PVQ, BG2; 4; 5

Dimensions in mm

1	Suction port
2	Pressure port
3	Cylindrical drive shaft (nominal dimensions of the drive shafts see double pump PVV / PVQ, BG54)

BG	Suction port
BG		ØD5	D8-2B	B3	L6	L4	H1
2	SAE 1 1/2"	38 mm	1/2"-13UNC; 22 mm	69,9 mm	35,7 mm	120,6 mm	76,2 mm
4	SAE 2"	50,8 mm	1/2"-13UNC; 23,8 mm	77,7 mm	42,8 mm	125,5 mm	82,6 mm
5	SAE 3"	76,2 mm	5/8"-13UNC; 28,6 mm	106,3 mm	61,9 mm	153,2 mm	93,6 mm

BG	Pressure port
BG		ØD6	D7-2B	B4	L7	L3
2	SAE 1"	25,4 mm	3/8"-16UNC; 19 mm	52,4 mm	26,2 mm	38,1 mm
4	SAE 1 1/4"	31,8 mm	7/16"-14UNC; 22 mm	58,7 mm	30,1 mm	38,1 mm
5	SAE 1 1/2"	38,1 mm	1/2"-13UNC; 23,8 mm	69,9 mm	35,7 mm	42,9 mm

BG	Mounting flange								B2	L1	H2
BG		B1	ØD1	ØD2	ØD3	ØD4-0,05 mm	L2	L5	B2	L1	H2
2	SAE-B	174 mm	14 mm	146 mm	121 mm	101,6 mm	9,5 mm	13 mm	117 mm	163 mm	64 mm
4	SAE-C	212 mm	17,5 mm	181 mm	148 mm	127 mm	9,5 mm	16 mm	140 mm	186 mm	70 mm
5	SAE-C	212 mm	17,5 mm	181 mm	148 mm	127 mm	12,7 mm	16 mm	159 mm	216 mm	83 mm

PVV / PVQ 2...K.. - with through-drive

Dimensions in mm

PVV / PVQ 4...K.. - with through-drive

Dimensions in mm

PVV, PVQ 5...K.. - with through-drive

Dimensions in mm

Double pump PVV / PVQ, BG21; 41; 42; 51; 52

Dimensions in mm

1	Suction port
2.1	Pressure connection, flange-side
2.2	Pressure connection, cover-side
3	Cylindrical drive shaft (nominal dimensions of the shaft ends see shaft end for BG2 to 54)

BG	Mounting flange
BG		B1	ØD1	ØD2	ØD3	ØD4-0,05 mm	L2	L5
21	SAE-B	174 mm	14 mm	146 mm	121 mm	101,6 mm	9,5 mm	13 mm
41; 42	SAE-C	212 mm	17,5 mm	181 mm	148 mm	127 mm	9,5 mm	16 mm
51; 52	SAE-C	212 mm	17,5 mm	181 mm	148 mm	127 mm	12,7 mm	16 mm

BG	Suction port
BG		ØD5	D8-2B	B3	L6	L4	H1
21	SAE 1 1/2"	63,5 mm	1/2"-13UNC; 23,8 mm	88,5 mm	50,8 mm	101,6 mm	84,1 mm
41; 42	SAE 3"	76,2 mm	5/8"-11UNC; 28,6 mm	106,3 mm	61,9 mm	114,4 mm	88,9 mm
51; 52	SAE 3 1/2"	88,9 mm	5/8"-11UNC; 31,8 mm	120,7 mm	69,9 mm	119,3 mm	102,4 mm

BG	Pressure connection, flange-side
BG		ØD6	D7-2B	B4	L7	L3	H4
21	SAE 1"	25,4 mm	3/8"- 16UNC; 19,1 mm	52,4 mm	26,2 mm	38,1 mm	76,2 mm
41; 42	SAE 1 1/4"	31,8 mm	7/16"- 14UNC; 21,6 mm	58,7 mm	30,1 mm	38,1 mm	82,6 mm
51; 52	SAE 1 1/2"	38,1 mm	1/2"- 13UNC; 23,8 mm	69,9 mm	35,7 mm	42,9 mm	93,6 mm

BG	Pressure connection, cover-side
BG		ØD11	D12-2B	B5	L12	L11	H6	B2	L1	H2
21	SAE 3/4"	19,1 mm	3/8"-16UNC; 19,1 mm	47,6 mm	22,2 mm	88 mm	76,2 mm	132 mm	252 mm	64 mm
41	SAE 3/4"	19,1 mm	3/8"-16UNC; 19,1 mm	47,6 mm	22,2 mm	99,5 mm	74,7 mm	140 mm	275 mm	70 mm
42	SAE 1"	25,4 mm	3/8"-16UNC; 19,1 mm	52,4 mm	26,2 mm	109,5 mm	76,2 mm	143 mm	288 mm	74 mm
51	SAE 3/4"	19,1 mm	3/8"-16UNC; 19,1 mm	47,6 mm	22,2 mm	119,5 mm	74,7 mm	162 mm	306 mm	85 mm
52	SAE 1"	25,4 mm	3/8"-16UNC; 19,1 mm	52,4 mm	26,2 mm	135,8 mm	76,2 mm	162 mm	324 mm	85 mm

Double pump PVV / PVQ, BG54

Dimensions in mm

1	Suction port
2.1	Pressure connection, flange-side
2.2	Pressure connection, cover-side
3	Cylindrical drive shaft (nominal dimensions of the shaft ends see tables)
4	Fitting key (dimensions see table)

Shaft end for BG2 to 54

Dimensions in mm

Shaft design A
BG	L8	L9	H3	ØD9	Fitting key	Tmax in Nm
2; 21	46,8 mm	59 mm	24,5-0,2 mm	22,23-0,3 mm	▢ 4,76 mm x 31,8 mm	250
4; 41; 42	61,9 mm	73,2 mm	35,2-0,3 mm	31,75-0,3 mm	▢ 7,9 mm x 38,1 mm	407
5; 51; 52; 54	47,8 mm	62 mm	35,2-0,3 mm	31,75-0,3 mm	▢ 7,9 mm x 28,4 mm	610

Shaft design B
BG	L8	L9	H3	ØD9	Fitting key	Tmax in Nm
2; 21	64 mm	78 mm	28,3-0,2 mm	25,37-0,02 mm	▢ 6,36 mm x 50,8 mm	400
4; 41; 42	74,6 mm	86 mm	38,6-0,3 mm	34,9-0,03 mm	▢ 7,9 mm x 54,6 mm	600
5; 51; 52; 54	73 mm	88 mm	42,37-0,23 mm	38,07-0,02 mm	▢ 9,5 mm x 54,6 mm	810

Shaft design J
BG	L8	L9	L10	ØD10	Tmax in Nm	Gearing data
2; 21	33,3 mm	41 mm	4 mm	27,8 mm	316	SAE-B 7/8", 13 teeth, 16/32 DP
4; 41; 42	42,1 mm	56 mm	3,04 mm	35,05 mm	580	SAE-C 1/4", 14 teeth, 12/24 DP
5; 51; 52; 54	46,6 mm	56 mm	9,7 mm	41,28 mm	818	SAE-C 1/4", 14 teeth, 12/24 DP

Maximum admissible through-drive torques in Nm
BG	Through-drive
BG	K01 (SAE-A, 9T)	K02 (SAE-B, 13T)	K07 (SAE-C, 14T)
2	131	316	-
4	131	316	437
5	131	384	702

SAE connection flanges

Suction port	Pressure connection for PVV / PVQ 1)	NG	Seal material	Material number for flange with		B1	B2	B3	B4	ØD1	ØD2	D3	Mounting screws
Suction port	Pressure connection for PVV / PVQ 1)	NG	Seal material	Welded connection	Threaded connection	B1	B2	B3	B4	ØD1	ØD2	D3	Mounting screws
	1; 21; 41; 51	3/4“	NBR	R900211169	R900063050	47,6 mm	65 mm	22,2 mm	52 mm	25 mm	19 mm	G3/4	3/8"-16UNC
	2; 21; 42; 52	1“	NBR	R900211170	R900211175	52,4 mm	70 mm	26,2 mm	59 mm	30 mm	22 mm	G1	3/8"-16UNC
	4; 41; 42; 54	1 1/4"	NBR	R900211363	R900211172	58,7 mm	79 mm	30,2 mm	68 mm	38 mm	28 mm	G1 1/4	7/16"-14UNC
	5; 51; 52; 54	1 1/2"	NBR	R900211168	R900211171	69,9 mm	95 mm	35,7 mm	76 mm	38 mm	30 mm	G1 1/2	1/2"-13UNC
1; 2		1 1/2"	NBR	R900211165	R900211171	69,9 mm	95 mm	35,7 mm	76 mm	48 mm	39 mm	G1 1/2	1/2"-13UNC
4		2"	NBR	R900211434	R900211173	77,8 mm	102 mm	42,9 mm	90 mm	60 mm	49 mm	G2	1/2"-13UNC
21		2 1/2"	NBR	R900063063	R900211174	88,9 mm	114 mm	50,8 mm	104 mm	76 mm	62 mm	G2 1/2	1/2"-13UNC
5; 41; 42		3"	NBR	R900211362	‒	106,3 mm	135 mm	61,9 mm	131 mm	76 mm	70 mm	‒	5/8"-11UNC
51; 52		3 1/2"	NBR	R900211166	‒	130,7 mm	152 mm	69,9 mm	140 mm	89 mm	82 mm	‒	5/8"-11UNC
54		4"	NBR	R900211167	‒	130,2 mm	162 mm	77,8 mm	152 mm	114 mm	107 mm	‒	5/8"-11UNC

1)	Bold figure specifies the stage for which the flange (with double pumps) is intended.

The material numbers comprise the flange, the O-ring and the mounting screws.

Pipe thread "G" according to ISO 228/1

Comprehensive information and suggestions are contained in the Hydraulics Trainer, volume 3, RE 00281, “Project planning information and design of hydraulic systems".

When using vane pumps, we recommend particularly observing the information specified below.

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.

Noise

The values for sound pressure level shown on page 8 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 unfavorable influences at the place of installation of the power unit, the sound pressure level may, however, still be 5 to 10 db(A) higher than the values of the pump itself.

Drive

Electric motor + pump carrier + coupling + pump

Attention!

no radial and axial forces on the pump drive shaft admissible! Motor and pump must be exactly aligned! use a torsionally flexible coupling

Fluid tank

Adjust useful volume of the tank to the operating conditions.

Attention!

The admissible fluid temperature must not be exceeded use coolers, if necessary!

Lines and connections

Cut with an inclination of 45° Remove the protective plug at the pump We recommend using seamless precision steel pipes according to DIN 2391 and releasable pipe connections. Select the inner width of the pipes according to the connections Pipelines and fittings must be carefully cleaned before assembly. – min. distance 120 mm to the tank bottom Dirt deposits are not sucked in or raised min. 50 mm immersion depth, also with lowest fluid level admissible Foam formation is avoided Leakage and return fluid must not be directly sucked in again under any circumstances! Liquid temperature remains low For the inlet pressure refer to the Technical data

Recommendation for pipe-laying

Return fluid must not be directly sucked in again under any circumstances, i.e. select the largest distance possible between suction and return line Return flow outlet must always lie below the oil level Ensure suction-tight assembly of the pipelines

Filter

Use return flow or pressure filter if possible. (Suction filters only in connection with underpressure switch/clogging indicator).

Hydraulic fluid

Please observe our provisions according to catalog sheet RE 07075. 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 liquid must be renewed at certain time intervals. In this connection, it is also necessary to clean the fluid tank from residues.

admissible installation positions

horizontal position preferred

B3

B5

V1

Commissioning

Check whether the system has been assembled carefully and properly. Only fill in hydraulic fluid through filters with the required minimum retention rate. Observe the arrow indicating the direction of rotation. Start up the pump without load and allow to pump at zero pressure for some seconds in order to allow for sufficient lubrication. Do not operate the pump without oil under any circumstances. If the pump does not deliver medium without bubbles after approx. 20 seconds, the system must be checked once again. After the operating values have been reached, check the pipe connections for leak-tightness. Check the operating temperature.

Bleeding

Before the initial commissioning, we recommend filling the housing and the suction line of the pump with oil. This increases the operational safety and prevents wear in case of unfavorable installation conditions. During the initial commissioning, the foaming oil has to be discharged in circulation at zero pressure by carefully opening the pressure flange (provide splashguard, if necessary). Only re-tighten the fitting applying the specified torque if bubble-free oil exits.

General information

The pumps delivered by us have been checked for function and performance. Changes of any kind at the pump are not admissible; otherwise, the warranty will become void! Repair works may only be carried out by the manufacturer or their authorized dealers and agencies. No warranty is accepted for independently performed repairs.

Notice!

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!

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 RE 25880 and RE 25890.

PVQ21-1X/040-040RA15UUMB

Manufacturer: Bosch Rexroth

Material #: R978918941

Model : PVQ21-1X/040-040RA15UUMB

More are expected on February 20, 2025

This product is eligible for factory repair.

Selection table

Selection table

Hydraulic fluid

BG1; BG2; BG4; BG21; BG41; BG42

BG5; BG51; BG52; BG54

BG1

BG2

BG4

BG5

Double pump

Single pump

Version "A"

Version J

SAE connection flanges

Drive

Recommendation for pipe-laying

B3

B5

V1

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