R978877922 - BuyRexroth

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Manufacturer: Bosch Rexroth

Material #: R978877922

Model : DR20-5-5X/50YV/12

$1,689.00 USD

More are expected on November 12, 2026

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Note: Sales tax, shipping, and applicable tariffs will be calculated at checkout.

Qty	Price	Savings
5-24	$1,646.77 USD	$42.23 USD
25+	$1,604.55 USD	$84.45 USD

Status: This product is temporarily out of stock.

Qty: Delivered as early as November 12, 2026 when ordered in

This product is eligible for factory repair.

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For subplate mounting Porting pattern according to ISO 5781 For threaded connection As cartridge valve 4 optional adjustment types:• Rotary knob• Sleeve with hexagon and protective cap• Lockable rotary knob with scale• Rotary knob with scale 5 pressure ratings Check valve, optional (subplate mounting only)

Pressure valves type DR are pilot-operated pressure reducing valves controlled from the secondary circuit.

The pressure reducing valves basically consist of the main valve (1) with main spool insert (3) and pilot control valve (2) with pressure adjustment element.

Basic principle:

In rest position, the valves are open. Hydraulic fluid can flow via the main spool insert (3) from channel B to channel A without restrictions. The pressure applied in channel A acts on the bottom of the main spool. Simultaneously, pressure is applied via the nozzle (4) to the spring-loaded side of the main spool (3) and via channel (5) to ball (6) in the pilot control valve (2). Similarly, it acts via nozzle (7), control line (8), check valve (9) and nozzle (10) on the ball (6). Depending on the setting of the spring (11), pressure builds up upstream of the ball (6), in channel (5) and in the spring chamber (12) holding the control spool (13) in open position. The hydraulic fluid in channel B can flow via the main spool insert (3) to channel A without restrictions until a pressure builds up in channel A exceeding the value set at the spring (11) and opening the ball (6). The control spool (13) is moved into closing direction.

The desired reduced pressure is reached if there is a balance between the pressure in channel A and the pressure set at the spring (11).

The pilot oil return from the spring chamber (14) is always realized externally via the control line (15) into the tank.

For the free return flow from channel A to channel B, a check valve (16) can optionally be installed.

A pressure gauge connection (17) enables control of the reduced pressure in channel A.

Type DR..-4-5X/...Y...

01	02	03	04	05		06		07	08	09	10	11
DR					–	5X	/		Y			*

01	3-way pressure reducing valve		DR
02	Valve complete (subplate mounting or threaded connection)		no code
	Pilot control valve without main spool insert (cartridge valve) (do not enter nominal size)		C
	Pilot control valve with main spool insert (cartridge valve) (enter valve size 30)		C
03	Size	Ordering code
		Subplate mounting "–"	Threaded connection "G"
	10	= 10	= 10 (G1/2)
	16	–	= 15 (G3/4)
	25	= 20	= 20 (G1)
	25	–	= 25 (G1 1/4)
	32	= 30	= 30 (G1 1/2)
04	As cartridge valve (version "C", without main spool insert)		no code
	As cartridge valve (version "C", with main spool insert)		–
	For subplate mounting		–
	For threaded connection		G
Adjustment type for pressure adjustment
05	Rotary knob		4
	Sleeve with hexagon and protective cap (always at maximum pressure adjustment)		5
	Lockable rotary knob with scale		6 1)
	Rotary knob with scale		7
06	Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions)		5X
07	Set pressure up to 50 bar		50
	Set pressure up to 100 bar		100
	Set pressure up to 200 bar		200
	Set pressure up to 315 bar		315
	Set pressure up to 350 bar (only version "M")		350
Pilot oil supply
08	Internal pilot oil supply, external pilot oil return		Y
09	With check valve (only for subplate mounting)		no code
	Without check valve		M
Seal material
10	NBR seals		no code
	FKM seals (other seals upon request)		V
	Observe compatibility of seals with hydraulic fluid used.
11	Further details in the plain text		*

	1) H-key with material no. R900008158 is included in the scope of delivery.

general

Size				10	16	25	25	32
Type				10	16 (Typ DR...15)	25 (Typ DR..20)	25 (Typ DR...25)	32 (Typ DR...30)
Weight	Subplate mounting	Type DR . .‒	kg	3.4	-	5.3	-	8
	Cartridge valve	Type DRC	kg	1.2
	Cartridge valve	Type DRC 30	kg	1.5
	Threaded connection	Type DR . .G	kg	5.3	5.2	5.1	5	4.8
Installation position				any
Ambient temperature range	NBR seals		°C	-30 … +50
Ambient temperature range	FKM seals		°C	-20 … +50

hydraulic

Size			10	16	25		32
Maximum operating pressure 1)	Port B	bar	350
Maximum inlet pressure 1)	Port B	bar	350
Maximum outlet pressure 1)	Port …	bar	350
Operating pressure range 1)	Anschluss A	bar	10 … 350
Maximum counter pressure 1)	Port Y	bar	350
Minimum set pressure			flow-dependent, see characteristic curves
Maximum set pressure 1)		bar	50 100 200 315 350
Maximum flow	Subplate mounting	l/min	150	-	300	-	400
	Threaded connection	l/min	150	300		400
Hydraulic fluid			see table
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
	FKM seals	°C	-20 … +80
Viscosity range		mm²/s	10 … 800
Maximum admissible degree of contamination of the hydraulic fluid 2)			Class 20/18/15 according to ISO 4406 (c)

1)	350 bar only possible at version without check valve
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.

Hydraulic fluid		Classification	Suitable sealing materials	Standards
Mineral oils and related hydrocarbons		HL, HLP, HLPD	NBR, FKM	DIN 51524
Environmentally compatible	Insoluble in water	HETG	NBR, FKM	ISO 15380
	Insoluble in water	HEES	FKM	ISO 15380
	Soluble in water	HEPG	FKM	ISO 15380
Containing water	Water-free	HFDU, HFDR	FKM	ISO 12922
Containing water	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620)	NBR	ISO 12922
Important information on hydraulic fluids! For further information and data on the use of other hydraulic fluids, please refer to data sheet 90220 or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! Flame-resistant – containing water: Maximum operating pressure 210 bar Maximum hydraulic fluid temperature 60 °C Expected life cycle as compared to HLP hydraulic oil 30 % to 100 %

For applications outside these parameters, please consult us!

(measured with HLP46, ϑOil = 40 ±5 °C)

Outlet pressure pA dependent on the flow qV (B to A)

Minimum set pressure pAmin dependent on the flow qV (B to A)

The characteristic curves apply to the pressure at the valve outlet pT = 0 bar across the entire flow range.

Δp-qV characteristic curve (B to A; minimum adjustable pressure differential)

Pilot flow dependent on flow (B to A) and pressure differential

Δp-qV characteristic curves via check valve (A to B)

Type DR…YM

Type DR…Y

Type DRC…; cartridge valve

Dimensions in mm

1	Name plate
2.1	Y port for pilot oil return, external
2.2	Port Y optionally for external pilot oil return
3	Adjustment type "4"
4	Adjustment type "5"
5	Adjustment type "6"
6	Adjustment type "7"
7	Hexagon SW10
8	Space required to remove the key
9	Valve mounting bores
10	Seal rings
11	Main spool insert
12	Seal ring
13	Seal ring
14	Seal ring
15	Support ring
16	Support ring

Valve mounting screws (separate order)

4 hexagon socket head cap screws, metric

ISO 4762 - M8 x 40 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 31 Nm ± 10 %,

material no. R913000205

Type DR…; threaded connection

Dimensions in mm

1	Name plate
2.1	Y port for pilot oil return, external
3	Adjustment type "4"
4	Adjustment type "5"
5	Adjustment type "6"
6	Adjustment type "7"
7	Hexagon SW10
8	Space required to remove the key
9	Valve mounting bores
17	Pressure gauge connection

NG	D1	ØD2	T1
NG		mm	mm
10	G1/2	34	14
16 (Typ DR...15)	G3/4	42	16
25 (Typ DR..20)	G1	47	18
25 (Typ DR...25)	G1 1/4	58	20
32 (Typ DR...30)	G1 1/2	65	22

Type DR…; subplate mounting

Dimensions in mm

1	Name plate
2.1	Y port for pilot oil return, external
2.2	Port Y optionally for external pilot oil return
3	Adjustment type "4"
4	Adjustment type "5"
5	Adjustment type "6"
6	Adjustment type "7"
7	Hexagon SW10
8	Space required to remove the key
9	Valve mounting bores
17	Pressure gauge connection
18	Identical seal rings for ports A and B
18	Identical seal rings for ports X and Y
19	Port X without function (blind bore)
20	Locking pin

Subplate mounting:

Subplates (separate order)

Size 10

G 460/01 (G3/8)

G 461/01 (G1/2)

Size 20

G 412/01 (G3/4)

G 413/01 (G1)

Size 30

G 414/01 (G1 1/4)

G 415/01 (G1 1/2)

1	Notice! Bore Ø32 can cut into Ø45 at any position. However, it must be observed that the connection bores and valve mounting bore are not damaged!
2	Support ring and seal rings are to be inserted into this bore before assembly of the main spool!
3	Nozzle, separate order

Valve mounting screws (separate order)

Size 10

4 hexagon socket head cap screws, metric

ISO 4762 - M10 x 50 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 60 Nm ± 10 %,

material no. R913000471

Size 20

4 x ISO 4762 - M10 x 60 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 60 Nm ± 10 %,

material no. R913000116

Size 30

6 x ISO 4762 - M10 x 70 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 60 Nm ± 10 %,

material no. R913000126

NG	L1	L2	L3	L4	L5	L6	L7	L8	L9	L10	B1	B2	B3	B4	B5	H1	H2	H3
NG	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm
10	96	35.5	33	42.9	21.5	-	7.2	21.5	31.8	35.8	85	50	66.7	58.8	7.9	112	92	28
16	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
25	116	37.5	35.4	60.3	39.7	-	11.1	20.6	44.5	49.2	102	59.5	79.4	73	6.4	122	102	38
25	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
32	145	33	29.8	84.2	59.5	42.1	16.7	24.6	62.7	67.5	120	76	96.8	92.8	3.8	130	110	46

Valve mounting screws (separate order)

4 hexagon socket head cap screws, metric

ISO 4762 - M8 x 40 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 31 Nm ± 10 %,

material no. R913000205

Installation bore
Dimensions in mm

Dimensions in mm

1	Notice! Bore Ø32 can cut into Ø45 at any position. However, it must be observed that the connection bores and valve mounting bore are not damaged!
2	Support ring and seal rings are to be inserted into this bore before assembly of the main spool!
3	Nozzle, separate order

Valve mounting screws (separate order)

Size 10

4 hexagon socket head cap screws, metric

ISO 4762 - M10 x 50 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 60 Nm ± 10 %,

material no. R913000471

Size 20

4 x ISO 4762 - M10 x 60 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 60 Nm ± 10 %,

material no. R913000116

Size 30

6 x ISO 4762 - M10 x 70 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 60 Nm ± 10 %,

material no. R913000126

Rexroth Training

Manufacturer: Bosch Rexroth

Material #: R978877922

Model : DR20-5-5X/50YV/12

More are expected on November 12, 2026

This product is eligible for factory repair.

Type DR..-4-5X/...Y...

general

hydraulic

(measured with HLP46, ϑOil = 40 ±5 °C)

Outlet pressure pA dependent on the flow qV (B to A)

Minimum set pressure pAmin dependent on the flow qV (B to A)

Δp-qV characteristic curve (B to A; minimum adjustable pressure differential)

Pilot flow dependent on flow (B to A) and pressure differential

Δp-qV characteristic curves via check valve (A to B)

Type DR…YM

Type DR…Y

Type DRC…; cartridge valve

Type DR…; threaded connection

Type DR…; subplate mounting

Installation bore
Dimensions in mm

Related Products

Information

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Rexroth Training

Manufacturer: Bosch Rexroth

Material #: R978877922

Model : DR20-5-5X/50YV/12

More are expected on November 12, 2026

View Bulk Pricing Discounts

This product is eligible for factory repair.

Type DR..-4-5X/...Y...

general

hydraulic

(measured with HLP46, ϑOil = 40 ±5 °C)

Outlet pressure pA dependent on the flow qV (B to A)

Minimum set pressure pAmin dependent on the flow qV (B to A)

Δp-qV characteristic curve (B to A; minimum adjustable pressure differential)

Pilot flow dependent on flow (B to A) and pressure differential

Δp-qV characteristic curves via check valve (A to B)

Type DR…YM

Type DR…Y

Type DRC…; cartridge valve

Type DR…; threaded connection

Type DR…; subplate mounting

Installation bore Dimensions in mm

Related Products

Information

Account

Installation bore
Dimensions in mm