positive control block in mono block design m9-25 · ambient temperature range θ °c –20 to +80...

RE 64303/02.2014, Bosch Rexroth AG

Features ▶ Control principle: 2 circuit positive control

(no fixed pump circuit possible) ▶ 6/3-way valve control ▶ Internal summing functions for arm and boom ▶ Improved distribution of quantities with parallel motions

for driving/equipment ▶ Arm regeneration with braking valve function at the tank ▶ Boom spool with integrated regeneration function ▶ Optimum boom supply with parallel motions of the

bucket or rotating mechanism ▶ Semi priority of the rotating mechanism axis with regard

to the arm axis ▶ Integrated anti drift valves for the arm rod and the

boom base ▶ Primary and secondary pressure limitation via pilot

operated screw-in cartridge valves with combined feed function to avoid cavitation

Design ▶ Mono block with 7 actuator axes and 2 summing semiaxes ▶ Can be extended with directional valves (maximum of 2) ▶ Flanged inlet element with primary valve, tank and

cooler preload valve, movement compensation valve ▶ Cost-effective piping with low Δp ▶ Type of actuation

– Hydraulic

▶ Size 25 ▶ Series 1X ▶ Maximum operating pressure

– 350 bar on the pump side – 380 bar on the actuator side

▶ Maximum flow – 2 x 300 l/min on the pump side

RE 64303Edition: 02.2014Replaces: 07.2013

Positive control block in mono block designM9-25

ContentsFunctional description 2Technical data 3Ordering code 4Symbols 7Primary and secondary pressure limitation 9Dimensions 9Project planning information 13Related documents 13

Bosch Rexroth AG, RE 64303/02.2014

2 M9-25 | Control blockFunctional description

Functional description

Fields of applicationThe series M9 compact control blocks primarily control the standard functions of tracked excavators or mobile excava-tors in a 2 circuit hydraulic system, such as boom, bucket, travel drive, arm and rotating mechanism.In this context, it is very important that the driver can control the many possible parallel movements of a hydrau-lic excavator easily, comfortably and without a high amount of concentration and with optimum use of energy.

Control block M9-25The control block mainly consists of the housing (1), the main spools (2) with return springs (3), integrated primary and secondary cartridge valves (4) and load holding valves (5).

Actuator controlThe right travel drive (spool axis 3), rotating mechanism (spool axis 2) and arm (spool axis 1) are connected to pump P1.Compared to a true parallel connection, the influence of the arm motions on the motions of the rotating mechanism is reduced. Therefore, semipriority of the rotating mecha-nism is achieved by switching the rotating mechanism and arm sections. Quantity fluctuations of the rotating

mechanism due to the parallel movements that drivers consider uncomfortable are minimized. The left travel drive (spool axis 4), boom (spool axis 5), bucket (spool axis 6) and option section (spool axis 7) are connected to pump P2.The selected switching guarantees sufficient supply of the boom function in parallel movement with the bucket move-ment with a lower load. This prevents the boom from stopping. The option section (spool axis 7) integrated into the block is connected in parallel to the boom. Other option sections can be flange-mounted at the sides. The pump is connected via the parallel channel.

SummingBoth circuits contain one summing valve each. They allow for internal supply of the functions lift boom and arm on/off with two pumps.

Inlet elementThe inlet element is used to determine quantity distribution with parallel motions for driving/equipment. In the parallel movement, the inlet element switches pump P1 to both travel drive sections and pump P2 is switched to the equip-ment via the parallel channels of the two circuits.

▼ Section M9-25

T TP

21 33

4 5

1 Housing2 Main spool3 Return spring

4 Secondary valve5 Load holding valve


Control block | M9-25 Technical data

3

Technical data

general

Weight 7-fold mono block kg 195

Directional valve M9-25 kg 20

End plate kg 6.5

Installation position Any

Type of connection of the actuators See page 9

Ambient temperature range θ °C –20 to +80

Priming Single coat paint RAL 5001

hydraulic

Maximum operating pressure at the port

P p bar 350

A, B p bar 380

T p bar 30

L p bar Must be led to the tank in a depressurized form

Maximum pilot pressure at the port a, b p bar 35

Pilot pressure range (recommended) Hydraulic p bar 0 to 35

Maximum flow at the port P qVmax l/min 2 x 300

A, B qVmax l/min

Hydraulic fluid Mineral oil (HL, HLP) according to DIN 51524, other hydraulic fluids, such as HEES (synthetic esters) ac-cording to VDMA 24568, as well as hydraulic fluids as specified in data sheet RE 90221, at request

Hydraulic fluid temperature range θ °C –20 to +80

Viscosity range ν mm²/s 10 to 380

Maximum admissible degree of contamination of the hydraulic fluid cleanliness class according to ISO 4406 (c)

Class 20/18/15, for this we recommend using a filter with a minimum retention rate of β10 ≥ 75

NoticeFor applications outside these parameters, please consult us!


4 M9-25 | Control blockOrdering code

Ordering code

Information on the name plateThe ordering code serves to specify the technical features and requirements. The Rexroth distribution organization derives a short type as well as a material number from the ordering code.

01 02 03 04 05 06 07 08

M9 – . . . . – 1X / M9-25 / H / V 11 *

Series01 Control block M9 M9

02 4-digit control block number . . . .

Series03 10 to 19 (unchanged installation and connection dimensions) 1X

04 Total number of spool axes 7 to 9

Type of actuation05 Hydraulic H

Seal material06 FKM seals V

Actuator ports07 Flange connection according to DIN EN 6162 11

08 Further details in the plain text *


Control block | M9-25 Ordering code

5

1) When designing the preload values, consider the cooling power necessary for the machine.

Features of the inlet element01 02 03 04 05

M9-25 / –

Primary pressure limitation 01 02 03

01 Pressure relief valve V … 000

Pressure/feed valve with pressure sequencing stage B … …

Pressure/feed valve with pressure cut-off stage L … …

02 Specified pressure of the pressure relief valve (in bar, 3 digits) …

03 Specified pressure of the pressure sequencing and/or cut-off stage (in bar, 3 digits) …

Tank preloading 1)

04 Without tank preloading TZ

1.0 bar T1

3.0 bar T3

5.0 bar T5

7.0 bar T7

Cooler preloading 1)

05 Without cooler preloading KZ

1.0 bar K1

3.0 bar K3

5.0 bar K5

7.0 bar K7



Features of the spool axes

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16

M9-25-1X / 1 H H

7-fold mono block

1. Spool axis (arm)

2 H H2. Spool axis (rotating mechanism)

3 J H H3. Spool axis (driving right)

4 J H H4. Spool axis (driving left)

5 H H5. Spool axis (boom)

6 H H6. Spool axis (bucket)

7 H H7. Spool axis (option)

M9/22-1X / 8 H H Directional valves to be flange-mounted (optional)

8. Spool axis (option)

M9/22-1X / 9 H H9. Spool axis (option)

01 Spool axis number 1 to 9

Spool type 2)

02 Main spools A/B/T blocked in neutral position E

Main spools A/B → T open in neutral position J

Main spools A/B → T throttled at the tank in neutral position Q

Main spools P/B → A in spool position b R

Flow03 Supply quantity A (in l/min, 3 digits) …

04 Supply quantity B (in l/min, 3 digits) …

A side B side

Type of actuation 05 06 07 08 09 10

05,08 Hydraulic 3) H H

0609

Shuttle Without shuttle 00 00

With 0.8 mm shuttle 08 08



07,10 Pilot oil port G 1/4 without adapter Z Z

2) For the symbols, see “Main spool” on page 7 With hydraulic cylinders, the gear ratio must be specified in the plain text as E and Q spools have supply and outlet characteris-tic curves.

3) With measuring port.


Control block | M9-25 Symbols

7

A side B side

Secondary valves 11 12 13 14 15 16

1114

Without Z 000 000 Z 000 000

Feed valve E 000 000 E 000 000

Pressure relief/feed valve H … 000 H … 000

Pressure relief/feed valve with pressure sequencing function B … … N … …

12, 15 Specified pressure of the pressure relief/feed valve (in bar, 3 digits) … …

13, 16 Specified pressure of the pressure sequencing function (in bar, 3 digits) … …

NoticeAll functions can only be combined to a limited extent. Every enquiry requires individual verification.

Symbols

Main spool

Ordering code Main use Symbol

E ▶ Shut-off valve

B

T

A

P

J ▶ Hydraulic motor as actuator (A/B → T) ▶ Actuator ports are unloaded to the tank in

neutral position

B

T

A

P

Q

▶ Application with defined remaining opening (A/B → T)

▶ Actuator port is unloaded to the tank in neutral position

B

T

A

P

R

▶ E spool with regeneration function for the boom (cylinder base side to cylinder ring chamber)

B

T

A

P

▶ E spool with regeneration function for the arm

B

T

A

P



Control block Example: 7-fold mono block

1 Main spool2 Primary valve3 Secondary valve4 Load holding valves5 Throttled parallel arm bypass6 Throttled parallel bucket bypass7 Parallel channel P18 Parallel channel P29 Circulation valve circuit P110 Circulation valve circuit P211 Boom summing valve12 Arm summing valve13 Inlet element14 Regeneration spool lower boom15 Regeneration spool arm on16 Arm discharge valve17 Arm anti drift valve18 Boom anti drift valve19 Tank preload valve20 Cooler preload valve

17

3

5

1

7

8

6

20

2

13

19

A1B

1b1

A2B

2b2

A3B

3A4

B4

A5L3B

5b3

b4b5

A6B

6b6

a4

TPi

P2P1

YK

SL1

a3B

Ba2

a1L2

Pc1

a5a6

A7B

7b7 a7

Pc2

AB

15

16

1011

12

14

18

9

4

Arm

Rot

atin

g m

echa

nism

Dri

ving

rig

htD

rivi

ng le

ftB

oom

Buc

ket

Opt

ion

End

plat

e


Control block | M9-25 Primary and secondary pressure limitation

9Dimensions [mm]

Primary and secondary pressure limitation

The following primary valves can be selected: ▶ Pressure relief valve, pilot operated ▶ Pressure relief valve, pilot operated with pressure

sequencing range and pressure cut-off range

The following secondary valves can be selected: ▶ Pressure/feed valve, pilot operated ▶ Feed valve ▶ Pressure relief valve, pilot operated with pressure

sequencing range

Dimensions

Line connections

Port Dimension Similar standard

P1, P2DN 28 (SAE 1 1/4" 6000 PSI) DIN ISO 6162-2

A1, B5

A2 – A7, B1 – B4, B6, B7 DN 25 (SAE 1" 6000 PSI) DIN ISO 6162-2

TDN 28 (SAE 1 1/4" 3000 PSI) DIN ISO 6162-1

K

S M33 x 2 DIN EN ISO 9974-1

Y, Y‘, L DN 10 (G 1/4) DIN EN ISO 1179-1

a1 – a7, b1 – b7

DN 10 G 1/4 (version Z) DIN EN ISO 1179-1

Connections

P Pump

T Tank

K Cooler

A, B Actuator

S Feed connection of the rotating mechanism

Y, L Leakage oil connection (depressurized to the tank)

a, b Pilot oil port


10 M9-25 | Control blockDimensions

Dimensions [mm]

Install SAE flanges according to the manufacturer's specifications:1. Tighten the mounting bolts manually. 2. Diagonally tighten the mounting bolts.3. Tighten the mounting bolts gradually with the specified

torque (manufacturer's specifications).

NoticeNon-compliance may cause malfunctions due to stress on the anti drift valves!

Ø29+3

30.1

5±0.2

58.75±0.2

Ø29+3

31.7

±0.2

66.7±0.2

Ø25+0.5

27.8

±0.2

57.2±0.2

321

SAE 1“ 6000 PSI SAE 1 ¼“ 6000 PSI SAE 1 ¼“ 3000 PSI

1 4 x M12 thread depth 19

2 4 x M14 thread depth 19

3 4 x M10 thread depth 15.5

Flange coverM9-25 control blocks are delivered by default with the following flange cover.

▼ Standard flange cover

Optionally, M9-25 control blocks can be equipped with the following flange cover. This option must be specified in the configuration in clear text.

▼ Optional flange cover


Control block | M9-25 Dimensions

11Dimensions [mm]

▼ Example 7M9-25

111.5

1

436

280

317.3

70 70

49

5675.5

218.5230.5233.5

229227

6951

43 435.3

23.5

115.5

15

b7

b6

b5L3

b4

Pc1BB

b3

b2

b1

A1 B1

A2 B2

A3 B3

A4 B4

A5 B5

A6 B6

A7 B7

A B

145161

90

6767

55

165

21930

8.5

239

443

638

72.5

72.5

72.5

126

7675

7225

12

70.5

76.5

72.5

6813

0

6868

7070

70

3

2

2

47

86

5

9

3

1 Name plate2 Secondary valve3 Load holding valve4 Throttled parallel arm bypass5 Throttled parallel bucket bypass6 Inlet element7 Arm anti drift valve8 Boom anti drift valve9 End plate


12 M9-25 | Control blockDimensions

Dimensions [mm]

▼ Example 7M9-25 (back)

110

261.5191

11085

1

3

2

4

25.5154±0.2

43±0.2

1442

180

92.5115.5

1515

a7

a6

a5

a4

ABPc2

a3

a2

a1

L2

P2

Pi

P1L1

Y

TK

6767

3168

68

327.

5 361

356

215

7847

8±0.2

288 33

5

306

573 70

7070

5

638

1 Three mounting threads M16, 23 deep2 Primary valve3 Tank preload valve4 Cooler preload valve5 End plate


Control block | M9-25 Project planning information

13

Project planning information

The control block M9-25 is the core component of the hydraulic control of a mobile working machine. It is there-fore recommended to only specify it in connection with an overall hydraulic circuit diagram. For the design of a hydraulic control block of type M9-25, the following boundary conditions are relevant for project planning and should be enclosed to the enquiry:

▶ Machine type ▶ Maximum and minimum pump flow at rated speed ▶ Type of the pump controller ▶ Description of the actuator on the sections

(e.g. boom, winch) ▶ Cylinder ratios/motor displacement ▶ Information whether a system element is installed down-

stream the valve (e.g. hose burst check valve, lowering brake valve)

▶ Information on the loads (pressures) to be throttled per axis if there is no braking valve or the like.

Related documents

The control blocks M9-25 are system components.Also observe the instructions for the other system compo-nents. The product may not be commissioned until you are provided with the following documentation and have under-stood and observed it.

Title Document number Document type

Control blocks for mobile applications 64025-B Operating instructions

System documentation from the machine manufacturer Operating instructions

14


Bosch Rexroth AGMobile ApplicationsZum Eisengießer97816 Lohr am Main, GermanyPhone +49 9352 [email protected]

© This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.

M9-25 | Control block

positive control block in mono block design m9-25 · ambient temperature range θ °c –20 to +80...

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