Open center control block in monoblock design MO-40 · RE 64370/02.2015, Bosch Rexroth AG Open...

RE 64370/02.2015, Bosch Rexroth AG

Open center control block in monoblock designMO-40

▶ Size 40 ▶ Series 1X ▶ Maximum working pressure

– on pump side 350 bar – on consumer side 420 bar

▶ Maximum flow 680 l/min

Features ▶ Valve control in accordance with the 6/3-way principle ▶ Large fine control range for flow control with

progressiveflow characteristic ▶ High pressure carry-over feature for downstream

consumers when using C port (separation of by-pass line from tank line)

▶ Low internal leakage due to fitted main spool ▶ Main spool with automatic air bleed possible

Design ▶ Monoblock with 1, 3 or 4 consumer axes ▶ Type of actuation

– Hydraulic – Electrohydraulic

▶ Pressure limitation – Primary pressure relief valve in the P supply line – Secondary pressure relief valves/anti-cavitation

valves in stacking element design.

Fields of application ▶ Mining excavators ▶ Drilling rigs ▶ Cranes

RE 64370Edition: 02.2015Replaces: 02.1985

4MO-40

ContentsFunctional description 2Technical data 5Ordering code 6Characteristic curves 8Dimensions 9Related documents 12

Bosch Rexroth AG, RE 64370/02.2015

2 MO-40 | Control blockFunctional description

Functional description

High pressure mobile control blocks, type MO-40 are direc-tional control valves in monoblock design. They provide fine control of the speed and flow direction. The valves are optionally operated hydraulically or electrohydraulically.The control blocks of type MO-40 consist mainly of the housing (1), the main spool (2), load holding valve (3), the operating element (4), the return springs (5), mounted feed valves (6) (optional) and mounted secondary pressure relief valves (7) (optional).The 6/3-way valves combine the function of a 4/3-way valve and a 2/2-way valve. In non-actuated state, the main spool (2) is kept in the initial position by the return springs (5). In this position, the connection from the pump to the con-sumer is closed, the 2/2-way part is open and allows fluid to flow without pressure from P to T (free circulation).If the main spool (2) is moved out of its initial position, the connection from the pump to the consumer is opened via metering notches. The pump pressure increases. When the pressure at the consumer port is reached, the load holding valve (3) opens and the hydraulic fluid begins to flow to the consumer. As the main spool (2) continues its movement, the opening to the tank takes place via metering notches for the hydraulic fluid coming from the consumer and the flow is gradually fed from the 2/2-way line to the consumer channel (fine control).

On the 3-spool control block, the load holding valves (3) are always integrated in the main spool. With the 1-spool and 4-spool version, the load holding valves (3) are located in the housing (1).

Spool strokeThe spool stroke is divided into approx. 30 % control land overlap and 50 % fine control range, while the remaining stroke serves to create the full opening. The overlap and a low spool tolerance serve to reduce internal leakage. Due to the large fine control range, the consumers can be sensitively controlled.

Control characteristics, operating forces Uniform quality of the control characteristics and low oper-ating forces are achieved through optimum design of the metering edges in the housing, favorable shape of the metering notches and fitting of the main spool with constant clearance.

Pressure setting of the primary and secondary valvesThe specified pressure values are set as follows:

▶ direct operated pressure valves at a flow of 2 to 3 l/min ▶ pilot operated pressure valves at a flow of 10 l/min.

Circuit types

Number of spool axes Size Possible circuit type

Ordering code

1

MO-40

1 T3 1 – – 2 – – 3 T4 1 //2//3//4 P4 1 – – 2//3 – – 4 L4 1//2//3 – – 4 M

// = parallel circuit– – = tandem circuit


Control block | MO-40 Functional description

3

▼ Cross section (example)

1 Housing2 Main spool3 Load holding valve (see symbol)4 Operating element5 Return springs6 Feed valve7 Secondary pressure relief valve

(optional)8 Primary pressure relief valve

(see symbol)

T

P

C

P

T

Version R (standard)Port T consumer side (only when no port C is required).

Version CBy-pass channel is separated from the tank line.

▼ Symbol example for a 1-spool block, hydraulic actuation

B

A

a

T

b

P

3 8

▼ With version R, the circulation and return go into a tank

TB4

P

A4

▼ With version C, the tank line is separated from the by-pass channel

TB4C

P

A4

PAT

1

TB

44 2 5

7

6


4 MO-40 | Control blockFunctional description

▼ Symbol 4MO-40 in parallel circuit (1//2//3//4)

B2

A2

a2

B1

A1

a1

M

T

b2

B3

A3

a3 b3

B4

A4

a4 b4

b1

P

▼ Symbol 3MO-40 in tandem circuit (1 – – 2 – – 3)

B2

A2

a2

B1

A1

a1

T

b2

B3

A3

a3 b3

b1

P

▼ Symbol 4MO-40 in mixed circuit (1//2//3//4)

B2

A2

a2

B1

A1

a1

T

b2

B3

A3

a3 b3

B4

A4

a4 b4

b1

P

On versions with a tandem circuit, the pump channel is blocked to the next spool axis if the free circulation is closed when an upstream main spool is actuated.

▼ Main spool with flushing grooves (on request)


Control block | MO-40 Technical data

5

Technical data

General

Weight with secondary valves Electrohydraulically operated kg approx. 487 (4-spool control block)

Installation position Any

Line connections SAE flange port according to ISO 6162

Ambient temperature range °C −20 to +80

Priming One-coat paint RAL 5010

Hydraulic

Maximum working pressure at port

P, C, X p bar 350

A, B p bar 420

T p bar 30

L p bar 0

Maximum pilot pressure at port

Pst p bar 30 (higher pressures on request)

a, b p bar 30 (higher pressures on request)

Maximum flow l/min 680

Hydraulic fluid Mineral oil (HL, HLP) according to DIN 51524, other hydraulic fluids, e.g. HEES (Synthetic ester) according to VDMA 24568 and hydraulic fluids as specified in data sheet 90221, on 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 level according to ISO 4406 (c)

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

Recommended hydraulic pilot controls 2TH6 see data sheet 645524TH5/6 see data sheet 64555 } Control curve no. 06TH7 see data sheet 64558

Note ▶ Please contact us if the unit is to be used outside

the specified range of values. ▶ The technical data was determined with a viscosity

range of ν = 41 mm2/s and a temperature of θ = 50 °C.


6 MO-40 | Control blockOrdering code

Ordering code

Short type Spool axis Additional information

01 02 03 04 05 06 07 08 09 10

MO – 40 – 1X /1st spool axis

2nd spool axis

3rd spool axis 11 12 13 14 15 16 17 18

/ *4th spool axis

Short type01 Number of spool axes 1, 3 or 4

02 Series control block MO MO03 Size 40 40

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

Primary pressure limitation 1)

05 Without Q 000–000

Pressure relief valve, pilot operated (MHDBV, see data sheet 64642) V …–000

Pressure/anti-cavitation valve with pressure sequencing stage (MHDBH, see data sheet 64642) B …–…

Pressure/anti-cavitation valve with pressure cut-off stage (MHDBM, see data sheet 64642) L …–…

Circuit type06 Number of spool axes Possible circuit type

1 1 Tandem circuit T3 1 – – 2 – – 3 Tandem circuit T4 1 //2//3//4 Parallel circuit P4 1 – – 2//3 – – 4 Mixed circuit L4 1//2//3 – – 4 Parallel circuit, final axis in tandem circuit M// = parallel circuit– – = tandem circuit

Spool type07 A B

P T

2 0 1 001

A B

P T

2 0 1 005

A B

P T

2 0 1 002

A B

P T

2 0 1 006

A B

P T

2 0 1 003

A B

P T

2 0 1 009

1) Pressure information for pressure limitation and pressure sequencing/cut-off stage in bar, 3-digit


Control block | MO-40 Ordering code

7

Type of actuation08 Hydraulic H

Electrohydraulic proportional W2

Electrohydraulic switchable W4

Secondary valves for A- and B-side1)

0910

Without ZPressure relief valve, pilot operated size 22 C…Pressure relief valve, pilot operated size 22 + anti-cavitation valve size 22 F…Pressure relief valve, direct operated size 22 R…Pressure relief valve, direct operated size 22 + anti-cavitation valve size 22 T…Feed valve size 22 SCover plate for secondary valve mounting face size 22 U

Tank port11 With tank port T R

With tank port T and pressure carry over port C for downstream consumers (not possible for tank port on consumer side, ordering code V)

C

Line connections12 SAE flange port according to ISO 6162 11

Pump port position13 Pump port P on secondary valve side S

Pump port P on consumer port side V

Tank port position14 Tank port T on secondary valve side S

Tank port T on consumer port side (not possible with version C) V

Installation position (standard)15 Designation of installation position from horizontal.

This determines the position of the air bleed.

A2

A1

B2

A3

B3

A4

B4

B1

1

A2

A1

B2

A3 B3

A4 B4

B1

2A B

3

Sealing material16 FKM (fluoroelastomer) V

NBR (nitrile-rubber) M

Optional17 Flushing grooves in the main spool S

18 Further specifications in plain text *

2) If two valves R or T are mounted per consumer port, the code letters + pressure setting are listed twice in the ordering code. Pressure information in bar, 3-digit


8 MO-40 | Control blockCharacteristic curves

Characteristic curves

▼ Δp – qV - Flow characteristic curve P → T in mid position, free by-pass)

0

10

8

6

2

4

600 700500400300200100

Pres

sure

diff

eren

ce [

bar]

Flow [l/min]

▼ Δp – qV - Flow characteristic curves

A1/B1 → T P → A4/B4

A4/B4 → T

P → A1/B1

0

10

8

6

2

4

1000600 800700 900500400300200100

P → A, B

A, B → T

Flow [l/min]

Pres

sure

diff

eren

ce [

bar]

NoteCharacteristic curves measured at ν = 41 mm²/s and θ = 50 °C).

▼ Symbol 001

A B

P T

2 0 1

2 0 1

2 0 1

2 0 1

2 0 1

T

P


Control block | MO-40 Dimensions

9Dimensions [mm]

Dimensions

Line connectionsSAE flange ports according to ISO 6162

Ports

P Pump DN 38 (SAE 1 1/2 in 6000 PSI)

T Tank DN 64 (SAE 2 1/2 in 3000 PSI)

A, B Consumer DN 38 (SAE 1 1/2 in 6000 PSI)

a, b Pilot oil G 3/8

C Pump pressure transfer DN 38 (SAE 1 1/2 in 6000 PSI)

▼ 1MO-40

315±0.3

225±0

.3

277

135

36.5

233.5

70

591

37053

25

25

7880

55

130 17

5 217 27

54

25

232

185

87

168

80

4355

16021

020

4

234

162

P

C

T

2

Aab

1

B

1 Name plate2 Three fastening threads M16, 25 deep


10 MO-40 | Control blockCharacteristic curves

Dimensions [mm]

▼ 3MO-40

a1 b1

b2

b3

a2

a3

T

PA1

A2

A3

B1

B2

B3

60 111.5 128 27

710

41070195 20

1

2 3

2340

87

230234 88

~610

540

120

102

80

50

57

450

300

150

50 55

150±0.2

97±0.2

500±0

.3

3

3

1 Name plate2 Three fastening threads M20, 30 deep3 Attachment point


Control block | MO-40 Characteristic curves

11Dimensions [mm]

▼ 4MO-40

55

135.5 60 35.5

1683705325 290

220200

70

70

a1b1

b2

b3

b4

a2

a3

a4

T

P

155591

1

2

3

3

80

80

210230

715±0

.3170±0.2

24

61

191

140

140

70176

9

140

71

1 Name plate2 Three fastening holes Ø 183 Attachment point

12


Bosch Rexroth AGMobile ApplicationsZum Eisengießer97816 Lohr am Main, GermanyTel. +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 this 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.

MO-40 | Control blockRelated documents

Related documents

The MO-40 control blocks are system components.Observe the instructions for the other system components. Only commission the product if the following documenta-tion is available to you and you have understood and observed it.

Title Document number Document type

Control blocks for mobile applications 64025-B Instruction manual

System documentation from the machine manufacturer Instruction manual

Open center control block in monoblock design MO-40 · RE 64370/02.2015, Bosch Rexroth AG Open...

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