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BOSCH REXROTH
R900349889


$705.00 USD
  • BOSCH REXROTH
  • Material:R900349889
  • Model:DR20G-5-4X/100YM/12

Due to extremely high demand, please call 920-337-0234 for availability

***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 DR20G5-4X/100YM/12 (R900349889) is a sophisticated pilot-operated pressure reducing valve designed to modulate system pressure efficiently. This valve is particularly suitable for subplate mounting and can be optionally equipped with a check valve for applications requiring a free return flow from channel A to B. The core functionality of the DR20G5-4X/100YM/12 lies in its ability to maintain consistent pressure in the outlet channel, regulated by a spring mechanism. In its default state, the valve allows hydraulic fluid to pass from the inlet to the outlet channel unimpeded, with the main control spool being held open. The system's pressure is balanced by the force of the spring against the hydraulic pressure acting on the main control spool. When outlet channel pressure surpasses a predetermined threshold, as set by an adjustable spring, it triggers the pilot poppet to open, redirecting fluid into a spring chamber which then shifts the main control spool into a controlling position to stabilize pressure at set levels. The design includes various adjustment types such as rotary knob and sleeve with hexagon and protective cap, including options that are lockable or come with a scale for precise settings. It also features external pilot oil return via port Y and adheres to ISO porting patterns for assured compatibility and ease of integration into various hydraulic systems. With component series X; X marking, this model boasts maximum operating pressures up to bar levels, demonstrating its capability in high-pressure environments. The DR20G5-4X/100YM/12 offers reliability and precision for industries requiring accurate pressure modulation within their hydraulic systems.

The pressure valve type DR is a pilot-operated pressure reducing valve. It is used to reduce the system pressure.

It mainly consists of screw-in cartridge valve (cartridge) and housing, optionally with or without check valve (subplate mounting only).

In the rest position the valve is open. The hydraulic fluid is able to flow freely from the inlet channel via the main control spool (1) to the outlet channel. The pressure in the outlet channel is applied to the spring-loaded side of the main control spool (1) via the bore (2). At the same time, the pressure acts upon the side of the main control spool (1) that is opposite to the spring via the bores (3) and (4).

If the pressure in the outlet channel exceeds the value set at the spring (6), the pilot poppet (5) opens.

Hydraulic fluid flows from the spring-loaded side of the main control spool (1) via the nozzle (7) and the pilot poppet (5) into the spring chamber (8).

The main control spool (1) assumes its control position and keeps the value in the outlet channel set at the spring (6) constant. The pilot oil return from the spring chamber (8) is always realized externally via the Y port (9).

In subplate mounting version "P", a check valve (10) can be optionally installed for free return flow from channel A to B.

Type DR 10 -4-4X/…

technical illustration-R900349889-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 4 pressure ratings

Type DR 20 G-4-4X/…

technical illustration-R900349889-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 4 pressure ratings

Notice!

The pressure in port Y is added 1:1 to the set reduced pressure.

01

02

03

04

05

06

07

08

09

10

DR

–

–

/

Y

*

01

Pressure reducing valve

DR

02

Size 10

Subplate mounting "no code"

10

Threaded connection "G" (G1 1/2)

10

Size 25

Subplate mounting "no code"

20

Threaded connection "G" (G3/4)

15

Threaded connection "G" (G1)

20

Screw-in cartridge valve "K"

20

03

Subplate mounting

no code

Threaded connection

G

Cartridge valve

K

Adjustment type

04

Rotary knob

4

Sleeve with hexagon and protective cap

5

Lockable rotary knob with scale

6 1)

Rotary knob with scale

7

05

Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions); (03 = "K")

1X

Component series 40 ... 49 (40 ... 49: unchanged installation and connection dimensions); (03 = "no code" and "G")

4X

Pressure rating

06

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

07

Internal pilot oil supply, external pilot oil return

Y

08

With check valve (subplate mounting only)

no code

Without spring return

M

Seal material

09

NBR seals

no code

FKM seals

V

Observe compatibility of seals with hydraulic fluid used. (Other seals upon request)

10

Further details in the plain text

*

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

Notice! Preferred types and standard units are specified in the EPS (standard price list).

general

Size

10 25

Weight

Subplate mounting

kg

3.2 3.5

Cartridge valve

kg

2.5 2.8

Threaded connection

kg

3.6 3.3

Installation position

any

Ambient temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80

hydraulic

Size

10 25

Nominal pressure

bar

315

Maximum operating pressure

Inlet

bar

315

Maximum secondary pressure

Outlet

bar

50
100
200
315

Maximum counter pressure

Port Y

bar

250

Set pressure

Minimum

flow-dependent, see characteristic curves

Maximum

bar

50
100
200
315

Maximum flow

Subplate mounting

l/min

80 160

Threaded connection

l/min

80 160

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 1)

Class 20/18/15 according to ISO 4406 (c)
1) 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

HL,HLP

NBR, FKM

DIN 51524

Bio-degradable

Insoluble in water

HETG

NBR, FKM

VDMA 24568

HEES

FKM

Soluble in water

HEPG

FKM

VDMA 24568

Containing water

Water-free

HFDU, HFDR

FKM

 

ISO 12922

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.)! The flash point of the hydraulic fluid used must be 40 K higher than the maximum surface temperature.

Flame-resistant – containing water:

The maximum pressure differential per control edge is 210 bar. Otherwise, there is increased cavitation erosion. Maximum hydraulic fluid temperature 60 °C Life cycle as compared to operation with mineral oil HLP 30 to 100 %

For applications outside these parameters, please consult us!

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

Minimum adjustable output pressure P dependent on the flow qV (B to A)

technical illustration-R900349889-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 4 pressure ratings

Pilot flow qV st dependent on the flow qV (B to A) and the pressure differential Δp

technical illustration-R900349889-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 4 pressure ratings

Δpmin-qV characteristic curve (B to A)

technical illustration-R900349889-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 4 pressure ratings

Δp-qV characteristic curve (B to A)

technical illustration-R900349889-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 4 pressure ratings

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

Subplate mounting

technical illustration-R900349889-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 4 pressure ratings

Type DR . .-.-4X/.YM, Type DR . K-.-1X/.YM (screw-in cartridge valve)

Subplate mounting, screw-in cartridge valve

technical illustration-R900349889-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 4 pressure ratings

Type DR . G-.-4X/.YM

Threaded connection

technical illustration-R900349889-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 4 pressure ratings

Subplate mounting

Dimensions in mm

technical illustration-R900349889-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 4 pressure ratings

Subplate mounting

Dimensions in mm

technical illustration-R900349889-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 4 pressure ratings

1

Adjustment type "4"

2

Adjustment type "5"

3

Adjustment type "6"

4

Adjustment type "7"

5

Lock nut SW22

6

Hexagon SW10

7

Hexagon SW30, tightening torque for screw-in MA = 50 Nm

8

Space required to remove the key

9

Locking pin

10

Valve mounting bores

11

Name plate

12

Identical seal rings for ports A and B

13

Seal ring for port Y

Type

L1

L2

L3

L4

L5

L6

B1

B2

B3

B4

H1

H2

H3

H4

ØD1

ØD2

ØD3

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

DR10 95.5 79 42.9 23 2.5 21.5 85 49 66.7 7.9 71 60 26 26 35.5 21.8 15
DR20 96 79.5 60.3 7 4 39.7 100 58 79.4 6.4 96 78 26 40 41 34.8 25

Threaded connection "G"

Dimensions in mm

technical illustration-R900349889-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 4 pressure ratings

1

Adjustment type "4"

2

Adjustment type "5"

3

Adjustment type "6"

4

Adjustment type "7"

5

Lock nut SW22

6

Hexagon SW10

7

Hexagon SW30, tightening torque for screw-in MA = 50 Nm

8

Space required to remove the key

10

Valve mounting bores

11

Name plate

14

Y port for pilot oil return

Type

D1

ØD2

mm

DR 10G G1/2 34
DR 15G G3/4 42
DR 20G G1 47

Notice!

In this valve version, no check valve for free return flow is installed in the valve.

Screw-in cartridge valve "K"

Dimensions in mm

technical illustration-R900349889-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 4 pressure ratings

1

Adjustment type "4"

2

Adjustment type "5"

3

Adjustment type "6"

4

Adjustment type "7"

5

Lock nut SW22

6

Hexagon SW10

7

Hexagon SW30, tightening torque for screw-in MA = 50 Nm

8

Space required to remove the key

15

Seal ring

16

Support ring

Mounting cavity

Dimensions in mm

technical illustration-R900349889-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 4 pressure ratings

Notice!

Optionally, the connection bores A, B and Y can be applied at the circumference.

Subplates (separate order)

Size 10:

G 460/01 (G3/8)

G 461/01 (G1/2)

Size 25:

G 412/01 (G3/4)

G 413/01(G1)

Valve mounting screws (separate order)

Size 10:

4 hexagon socket head cap screws ISO 4762 - M10 x 40 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

Tightening torque MA = 75 Nm ± 10 %

Size 25:

4 hexagon socket head cap screws ISO 4762 - M10 x 50 - 10.9-flZn-240h-L

(friction coefficient μtotal = 0.09 to 0.14);

Tightening torque MA = 75 Nm ± 10 %

Notice!

The tightening torques stated are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ± 10 %).