Winch control block - Bosch Rexroth

RE 65055, Edition: 2021-03, Bosch Rexroth AG

Features

▶ Manual, hydraulic or electrical operation, optional ▶ Sensitive, load-independent control ▶ Adjustable maximum flow ▶ Load sensing function ▶ Pressure compensated flow control ensures load-inde-

pendent winch speed ▶ Hand lever can be locked in neutral position ▶ System protection via pressure relief valve ▶ Important accessory parts (e.g. setscrews) made of

stainless steel or coated with rust protection. Moun-ting surfaces coated with sealant and protected against corrosion.

Contents

Features 1Ordering code 2Symbols 3Function, section, diagram 4 … 9Technical data 10Characteristic curves 11 … 15Dimensions 16 … 26Item explanations 26Flanges 27Circuit example 28, 29Adapter 30More information 30

▶ Size 15 … 50 ▶ Component series 2X ▶ Maximum operating pressure 250 bar ▶ Maximum flow 700 l/min

dmp

Winch control block

Type DMP, DME, DHP, DHE, DEP, DEE

RE 65055 Edition: 2021-03Replaces: 2016-07

Inhalt

Features 1Contents 1Ordering code 2Symbols 3Function, section, diagram: Type DMP 4Function, section, diagram: Type DME 5Function, section, diagram: Type DHP 6Function, section, diagram: Type DHE 7Function, section, diagram: Type DEP 8Function, section, diagram: Type DEE 9Technical data (for applications outside these parameters, please con-sult us!) 10Characteristic curves: Size 15 (measured with VG56, Oil = 50 ±5 °C) 11Characteristic curves: Size 20 (measured with VG56, Oil = 50 ±5 °C) 12Characteristic curves: Size 25 and 32 (measured with VG56, Oil = 50 ±5 °C) 13Characteristic curves: Size 40 and 50 (measured with VG56, Oil = 50 ±5 °C) 14Characteristic curves: Type DEP and DEE (measured with VG56, Oil = 50 ±5 °C) 15Dimensions: Type DMP and DHP, size 15 (dimensions in mm) 16Dimensions: Type DMP and DHP, size 20 to 50 (dimensions in mm) 17Dimensions: Type DME and DHE, size 15 (dimensions in mm) 18Dimensions: Type DME and DHE, size 20 to 50 (dimensions in mm) 19Dimensions: Type DEP, size 20 … 32 (dimensions in mm) 20Dimensions: Type DEP, size 40 and 50 (dimensions in mm) 21Dimensions: Type DEE, size 20 … 32 (dimensions in mm) 22Dimensions: Type DEE, size 40 and 50 (dimensions in mm) 23Dimensions: With counter balance valve or pressure relief valve (dimensions in mm) 24Dimensions: With counter balance valve and pressure relief valve (dimensions in mm) 25Dimensions: With brake release valve (dimensions in mm) 26Item explanations 26Dimensions: Flanges (dimensions in mm) 27Circuit example: Series circuit 28Circuit example: Ring main system 29Adapter: G1/4 (JIS B 2351) to G1/4 (ISO 1179) (separate order) 30More information 30Notes 31Notes 32

2/30 DMP, DME, DHP, DHE, DEP, DEE | Winch control block

Bosch Rexroth AG, RE 65055, Edition: 2021-03

Ordering code

01 Directional valve D

Winch control block

02 Manually operated, without spring centering M

Hydraulically operated, with spring centering H

Electrically operated, with spring centering E 1)

03 Ring main system (constant pressure system, load sensing system) E

Series circuit (fixed displacement pump for example) P

04 Size 15 15

Size 20 20

Size 25 25

Size 32 32

Size 40 40

Size 50 50

Connection type

05 Flange connection (separate order, see page 27) F

06 Component series 20 … 29 (20 … 29: unchanged installation and connection dimensions) 2X

Symbols

07 e.g. B, E, etc; possible variants see page 3

Pilot oil drain

08 Internal 1

External 2 2)

Counter balance valve 3)

09 Without counter balance valve 0

With counter balance valve in port A 1

With counter balance valve in port B 2

With counter balance valve in port A and B 3

Pressure relief valve 3)

10 Without pressure relief valve 0

With pressure relief valve in A and B line 1

Reducing valve (for brake release valve / brake activation) 1)

11 Without reducing valve 0

Brake release valve 4)

12 Without brake release valve 0

With brake release valve, normally open 1

With brake release valve, normally closed 2

13 Further details in the plain text *

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

D F 2X 0 *

1) Only available for size 20 … 502) Only available for type DMP size 25 … 503) Only available for size 20, 25 and 32, see page 244) Only available for type DMP and DME, see page 26

Winch control block | DMP, DME, DHP, DHE, DEP, DEE 3/30


Type Symbol Ordering Code

DMP

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DME

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DEP

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DEE

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DHP

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DHE

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GeneralWinch control valves of type DMP are proportional, manu-ally operated valves with pressure compensator. They provide a sensitive and load-independent hauling in and paying out in anchor, warping and mooring winches. They basically consist of housing (1), main spool (2), pressure compensator (3) and hand lever (4).

Neutral positionAs port A and B are blocked, the oil supplied by the pump, flows from port P to T via oil passage (9).

Operated positionThe stroke of the main spool (2) and thus the flow are proportional to the position of the hand lever (4). By operating the hand lever (4), the required flow will pass P–A and B–T, or P–B and A–T.The pressure acts on both sides of the pressure compen-sator. Load pressure A and B via channel X and Y affect on spring chamber of the pressure compensator (5) and on the other side pump pressure via channel (6).The pressure difference at the main spool (2), and there-fore the flow to the actuator, is maintained constant via the pressure compensator (3). The pressure difference between port P and A (B) is determined by spring force (7) and is constant at approx. 3,5 bar.Pressure changes at the actuators or at the pump are compensated by the pressure compensator (3). The flow to the actuator remains constant even if the load varies.The maximum flow can be set mechanically and individu-ally via stroke limiter (8).

Function, section, diagram: Type DMP

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GeneralWinch control valves of type DME are proportional, manu-ally operated valves with pressure compensator. They provide a sensitive and load-independent hauling in and paying out in anchor, warping and mooring winches. They basically consist of housing (1), main spool (2), pressure compensator (3) and hand lever (4).DME valve is designed for single applications in a ring main system.

Neutral positionIn case of spool type A ports A, B, P and T are blocked. In case of spool type C ports A, B are connected to the tank line. In neutral position the variable pump is in minimum displacement to maintain the pressure.

Operated positionBasically, the function of the valve is the same as that of type DMP. In case of ring main system, variable displace-ment pump with DR control (constant pressure control) is to be used.

Function, section, diagram: Type DME

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GeneralWinch control valves of type DHP are proportional, pilot pressure controlled valves with pressure compensator. They provide a sensitive and load-independent hauling in and paying out in anchor, warping and mooring winches. They basically consist of housing (1), main spool (2), pressure compensator (3) and spring pack (4). DHP valves are designed for series connections of two or more valves, supplied by a constant pump.

Neutral positionIn neutral position the main spool (2) is spring centered. In case of spool type B, port A and port B are blocked, in case of spool type E, ports A, B, P are connected via oil passage (10) to the tank line.

Operated positionThe stroke of the main spool (2) and at the same time the flow rate are proportional to the remote control pressure signal given to port PP1 and PP2. When pilot pressure is supplied to port PP1 or PP2, the required flow will pass P–A and B–T, or P–B and A–T.The pressure acts on both sides of the pressure compen-sator. Load pressure A and B via channel X and Y affect on spring chamber of the pressure compensator (5) and on the other side pump pressure via channel (6).The pressure difference at the main spool (2), and there-fore the flow to the actuator, is maintained constant via the pressure compensator (3). The pressure difference between port P and A (B) is determined by spring force (7) and is constant at approx. 3,5 bar.Pressure changes at the actuators or at the pump are compensated by the pressure compensator (3). The flow to the actuator remains constant even if the load varies.The maximum flow can be set mechanically and individu-ally via stroke limiter (8).

Function, section, diagram: Type DHP

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GeneralWinch control valves of type DHE are proportional, pilot pressure operated directional valves with pressure com-pensator. They provide a sensitive and load-independent hauling in and paying out in anchor, warping and mooring winches. They basically consist of housing (1), main spool (2), pressure compensator (3) and spring pack (4).DHE valve is designed for single applications in a ring main system.

Neutral positionIn neutral position the main spool (2) is spring centered.In case of spool type A ports A, B, P and T are blocked. In case of spool type C ports A, B are connected to the tank line.

Operated positionBasically, the function of the valve is the same as that of type DME. In case of ring main system, variable displace-ment pump with DR control (constant pressure control) is to be used.

Function, section, diagram: Type DHE

Position 1 and 4 are illustrated with an offset of 90° to show the ports PP(X) and Y(DR)!

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GeneralWinch control valves of type DEP are proportional, elec-trically operated directional valves with pressure compen-sator. They provide a sensitive and load-independent hauling in and paying out in anchor, warping and mooring winches. They basically consist of housing (1), main spool (2), pressure compensator (3) and proportional pressure reducing valve (4).DEP valve is designed for series connections of two or more blocks, supplied by a constant pump.A pilot pressure of 50 bar has to be supplied to port PP (X), port DR (Y) has to be connected to the tank directly.

Neutral positionIn neutral position the main spool (2) is spring centered.In case of spool type B, ports A and B are blocked. In case of spool type E ports A, B, P, T are connected.

Operated positionBasically, the function of the valve is the same as that of type DMP.

Function, section, diagram: Type DEP

Position 1 and 4 are illustrated with an offset of 90° to show the ports PP(X) and Y(DR)!

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GeneralWinch control valves of type DEE are proportional, elec-trically operated directional valves with pressure compen-sator. They provide a sensitive and load-independent hauling in and paying out in anchor, warping and mooring winches. They basically consist of housing (1), main spool (2), pressure compensator (3) and proportional pressure reducing valve (4).DEE valve is designed for single application in a ring main system.A pilot pressure of 50 bar has to be supplied to port PP (X), port DR (Y) has to be connected to the tank directly.

Neutral positionIn neutral position the main spool (2) is spring centered.In case of spool type B, ports A and B are blocked. In case of spool type C ports A, B are connected to the tank line.

Operated positionBasically, the function of the valve is the same as that of type DME.

Function, section, diagram: Type DEE



Technical data (for applications outside these parameters, please consult us!)

1) The cleanliness class stated for the components must be adhered too in hydraulic systems. Effective filtration prevents faults from occurring and at the same time increases the com-ponent service life.

For the selection of the filters see www.boschrexroth.com/filter.

general

Size 15 20 25 32 40 50

Weight ▶ Type DMP kg 14 21 46 46 90 90

▶ Type DME kg 14 25 50 50 101 101

▶ Type DHP kg 14.5 21 47 47 95 95

▶ Type DHE kg 14.5 25 56 56 106 106

▶ Type DEE kg _ 27 58 58 116 116

▶ Type DEP kg _ 23 50 50 105 105

▶ Counter balance valve (per valve) kg – 5.0 14.5 14.5 – –

▶ Pressure relief valve kg – 6.5 13.5 13.5 26 26

▶ Brake release valve kg – 4.5 4.5 4.5 4.5 4.5

Installation position any

Ambient temperature range °C –20 … +70 (Type DEE and DEP used with proportional pressu-re reducing valve type 3DREP)

Minimum paint coat thickness µm 30

hydraulic

Maximum operating pressure (Ports P, A, B) bar 250

Back pressure (Port T)

▶ Type DMP

– Internal drain bar 250 250 < 100 (connect to T line)

– External drain bar – – 250 250 250 250

▶ Type DME, DHE, DEE bar < 100 (connect to T line)

▶ Type DHP, DEP bar 250 250 250 250 250 250

(Port Y(DR)) ▶ Type DEP, DEE bar – 30 30 30 30 30

(Port DR1, DR2) ▶ Type DMP

– External drain bar < 100 (connect to T line)

Pilot pressure range (Port PP1, PP2, PP(X))

▶ Type DHP, DHE bar 5.2 … 20 5.0 … 19 5.1 … 24 5.1 … 24 5.3 … 22 5.3 … 22

▶ Type DEP, DEE bar _ 30 … 100

30 … 100

30 … 100

50 … 100

50 … 100

Pilot oil volume ▶ Type DHP, DHE cm3 3.5 6.9 23.9 23.9 51 51

Maximum flow l/min 60 120 200 300 450 700

Lever operating force N 40

Lever operating angle ° –40 … +40

Hydraulic fluid Mineral oils HL, HLP according to data sheet 90220, preferably HLP 32 or HLP 46, other hydraulic fluids upon request

Hydraulic fluid temperature range °C –25 … +90

Viscosity range mm2/s 10 … 1000

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

Class 20/18/15 1)

Note: ▶ In case of internal drain type, no drain port. ▶ Type DMP:

– 2 drain ports are available for size 32, 40 and 50. – 2 pressure port (P) available, blanking flange is attached to one side.

▶ Lever operating force shows the value when friction adjust-ment screw is loosened.

▶ Maximum flow to port A or B is controlable by stroke adjust-ment screw: – turn to right hand → flow increase – turn to left hand → flow decrease

▶ The position of the lever can be rotated in 90 degree steps.

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Characteristic curves: Size 15 (measured with VG56, Oil = 50 ±5 °C)

1 P – A (B), A – T

2 P – T, B – T

3 Adjusting screw fully closed

4 Adjusting screw fully open

Flow resistance curves: ∆p-qV

Flow in l/min →

Lever operating angle in °→

Pilot pressure in bar →


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Lever operating angle – flow curvesType DMP

Lever operating angle – flow curvesType DME

Pilot pressure – flow curvesType DHP and DHE

0

1

1

2

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2

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4

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0 20 40 60 80 100 120 1400

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15

20

25 5

67

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0 20 40 60 80 100 120 140

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Characteristic curves: Size 20 (measured with VG56, Oil = 50 ±5 °C)

1 A – T

2 P – A (B)

3 B – T

4 P – T

5 B3 – B2

6 B2 – B3

7 A2/A3 – A3/A2

8 Adjusting screw fully closed



Main spoolFlow resistance curves: ∆p-qV

Counter balance valve




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Characteristic curves: Size 25 and 32 (measured with VG56, Oil = 50 ±5 °C)

1 P – A (B)

size 252 A – T

3 P – T, B – T

4 P – A (B), A – Tsize 32

5 P – T, B – T

6 Adjusting screw fully closedsize 25





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Characteristic curves: Size 40 and 50 (measured with VG56, Oil = 50 ±5 °C)

1 P – A (B)

size 402 A – T

3 P – T, B – T

4 A – T

size 505 P – A (B)

6 P – T, B – T






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01,6 1,61,2 1,20,8 0,80,4 0,40

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600

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Characteristic curves: Type DEP and DEE (measured with VG56, Oil = 50 ±5 °C)

1 size 20

2 size 25

3 size 32

4 size 40

5 size 50

Current – flow curves

Current in A →

Flow

in l/m

in →



Dimensions: Type DMP and DHP, size 15 (dimensions in mm)

Ø Port A, B, P, T Port PP1, PP2 (JIS B 0203)

15 Rc3/8

Item explanations see page 26.

Type DMP Type DHP



Dimensions: Type DMP and DHP, size 20 to 50 (dimensions in mm)

Size L10 L11 H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 H13

20 58 40 115 65 – 20 – 260 35 458 82 65 247 56 338

25 and 32 78 50 155 85 20 25 160 360 45 643 115 85 345 60 486.5

40 and 50 91 60 210 110 25 30 215 470 55 753 155 110 470 70 621.5

Size D1 ØD2 t Ø Port A, B, P, T

20 M10 11 15 20

25 and 32 M12 14 19 30

40 and 50 M16 18 22 45

Size B1 B2 B3 B4 B5 B6 B7 B8 L1 L2 L3 L4 L5 L6 L7 L8 L9

20 134 110 – 67 110.5 48 75 3 134 110 40 32 60,5 48 92 70 106

25 and 32 170 140 15 85 139.5 65 95 5 170 140 56 40 74,5 65 128.5 90 128.5

40 and 50 220 180 20 110 178.5 80 120 0 220 180 73 91 84,5 80 162 103 138.5

Item explanations see page 26.Options with counter balance valve, pressure relief valve and brake release valve see page 24 to 26.

Type DMP Type DHP



Dimensions: Type DME and DHE, size 15 (dimensions in mm)

Ø Port A, B, P, T Port PP1, PP2 (JIS B 0203)

15 Rc3/8

Item explanations see page 26.

Type DME Type DHE



Dimensions: Type DME and DHE, size 20 to 50 (dimensions in mm)

Size L10 L11 L12 H1 H2 H4 H5 H6 H7 H8 H9 H11 H12 H13 H14

20 45 40 72,5 115 65 20 – 260 35 458 82 114 247 56 338

25 and 32 65 50 82,5 155 85 25 130 360 45 643 115 157 345 60 486.5

40 and 50 80 60 90 210 110 30 175 470 55 753 155 210 470 70 621.5

Siz

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D1 ØD2 tØ Port

A, B, P, T

20 M10 11 15 20

25, 32

M12 14 19 30

40, 50

M16 18 22 45

Size B1 B2 B4 B5 B6 B7 B8 B9 L1 L2 L3 L4 L5 L6 L7 L8 L9

20 134 110 67 120.5 48 80 3 40 134 110 40 32 60,5 48 92 80 106

25 and 32 170 140 85 169.5 65 110 5 56 170 140 56 40 74.5 65 120 105 128.5

40 and 50 220 180 110 208.5 80 135 0 73 220 180 73 52 84.5 80 162 132 138.5


Type DME Type DHE



Dimensions: Type DEP, size 20 … 32 (dimensions in mm)


Port PP, Y (JIS B 2351)

20 M10 11 15 20 G1/4

25 and 32 M12 14 19 30 G1/4


Size H1 H2 H4 H5 H6 H7 H9 H10

20 115 65 20 – 320 335 82 65

25 and 32 155 85 25 160 435 450 115 85

Size B1 B2 B4 B5 B6 B7 L1 L2 L3 L4 L6 L7 L8 L10 L11

20 134 110 67 110,5 48 75 134 110 40 32 48 92 70 58 40

25 and 32 170 140 85 139,5 65 95 170 140 56 40 65 120 90 65 50

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Dimensions: Type DEP, size 40 and 50 (dimensions in mm)


Port PP, Y, DR1, DR2 (JIS B 2351)

G1/4



Dimensions: Type DEE, size 20 … 32 (dimensions in mm)


Port PP, Y (JIS B 2351)

20 M10 11 15 20 G1/4

25 and 32 M12 14 19 30 G1/4


Size H1 H2 H4 H5 H6 H7 H9

20 115 65 20 114 320 335 82

25 and 32 155 85 25 157 435 450 115

Size B1 B2 B4 B5 B6 B7 L1 L2 L3 L4 L6 L7 L8 L9 L10 L11 L12

20 134 110 67 120,5 48 80 134 110 40 32 48 92 172 54,5 80 40 72,5

25 and 32 170 140 85 169,5 65 110 170 140 56 40 65 120 225 65 105 50 82,5



Dimensions: Type DEE, size 40 and 50 (dimensions in mm)


Port PP, Y, DR1, DR2 (JIS B 2351)

G1/4

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Dimensions: With counter balance valve or pressure relief valve (dimensions in mm)

Size

20 25, 32

H1 273 361

H2 40 65

L1 80 120

B1 78 100

Size

20 25, 32

H1 255 330

H2 22 34

L1 80 120

B1 78 100

Size H1 H2 H3 L1 L2 L3 L4 B1 B2 B3

20 244 147,5 51 80 40 – 40 – 118 39

25, 32 314 198,5 81 120 60 149,5 56 60 83 50

With counter balance valve at port B „2“With counter balance valve at port A „1“

With pressure relief valve „1“



Dimensions: With counter balance valve and pressure relief valve (dimensions in mm)

Size L1 L2 L3 L4 L5 B1 B2 B3

20 – 240 200 – – – 118 39

25, 32 389,5 360 300 260 129,5 60 83 50

With counter balance valve at port A and B and pressure relief valve „31“

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Item explanations

1 Name plate

2.1 Stroke adjustment screw; 13 A/F (P → B)

2.2 Stroke adjustment screw; 13 A/F (P → A)

3 Port PP2 (P → B); pilot port 2

4 Port PP1 (P → A); pilot port 1

5 4 valve mounting bores

6 Port DR1, DR2; drain port

7 Port T; tank

8 Port P; pump

9 Port A; consumer, outlet, serviceline

10 Port B; consumer, outlet, serviceline

11 Adjustment screw qV max; 13 A/F (size 15 to 32), 19 A/F (size 40 and 50)

Dimensions: With brake release valve (dimensions in mm)

12 Size 20

13 Size 32 to 50

14 Proportional pressure reducing valve in 3-way version type 3DREP 6 with wet-pin DC voltage solenoids; further Infor-mationen and dimensions see data sheet 29184

17 Port PP; proportional valve pilot port

18 Port Y; proportional valve pilot drain

Size L1 L2 L3 H1 H2 H3 H4 H5

20 75 130 36 260 50 10 40 40

25, 32 85 140 36 360 50 17 40 40

40, 50 95 150 36 470 50 24 40 40

Normally open „1“

Normally closed „2“



Dimensions: Flanges (dimensions in mm)

① Slip-on welding flange

(standard)

② Threaded flange

③ Blanking flange

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④ Slip-on welding elbow flange

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⑤ Threaded elbow flange

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Size B1 B2 B3 B4 D1 D2 D3 D4 D5 H1 H2 H3 L1 L2 L3 f

15 58 63 27 11 11 22.2+0,2 32 16 Rc1/2 22 11 40 54 36±0,2 54 3.5

20 62 70 29 12 11 27,7+0,2 38 20 Rc3/4 22 12 45 58 40±0,2 58 4

25 81 92 38 14 13 34,5+0,3 45 25 – 28 14 63 76 56±0,2 76 4

32 81 92 38 16 13 43,2+0,3 56 31.5 – 28 16 63 76 56±0,2 76 6

40 106 125 50 18 18 49,1+0,3 63 37.5 – 36 18 85 100 73±0,4 100 7

50 106 125 50 20 18 61,1+0,3 75 47.5 – 36 20 85 100 73±0,4 100 7

Fixing bolts 1) Material no.

Size O-ring (Pos. 1)

Piping size

①, ②, ③ ④, ⑤ ① ② ③ ④ ⑤

15 G25-1B 15 A M10 x 35 M10 x 50 R97209397B R971034532 R971034526 R971060220 R971060219

20 G30-1B 20 A M10 x 35 M10 x 55 R97209398B R971034533 R971034527 R971060010 R971060021

25 G40-1B 25 A M12 x 45 M12 x 80 R971048678 – R971060221 –

32 G40-1B 32 A M12 x 45 M12 x 80 R97209399B R971060020 R971034528 R971060011 R971060022

40 G60-1B 40 A M16 x 55 M16 x 110 R971048679 – R971060222 –

50 G60-1B 50 A M16 x 55 M16 x 110 R97209400B – R971034529 R971060223 –

1) With 4 off fixing bolts and 1 off o-ring for each flange.

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Circuit example: Series circuit

1R

emot

e co

ntro

l

2Lo

cal co

ntro

l

3B

rake

cyl

inder

4B

rake

rel

ease

val

ve



Circuit example: Ring main system

1R

emot

e co

ntro

l

2Lo

cal co

ntro

l

3B

rake

cyl

inder

4B

rake

rel

ease

val

ve

5P

ort

LS

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Bosch Rexroth AG Industrial HydraulicsZum Eisengießer 197816 Lohr am Main, Germany Phone +49 (0) 93 52 / 40 30 20 [email protected] www.boschrexroth.de

© All rights reserved to Bosch Rexroth AG, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights.The data specified above only serves 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.

Adapter: G1/4 (JIS B 2351) to G1/4 (ISO 1179) (separate order)

Material number

R97269109B (Adapter with O-ring)

More information

▶ Proportional pressure reducing valve Type 3DREP (for „DEP“ and „DEE“) Data sheet 29184

▶ Mineral oil-based hydraulic fluids Data sheet 90220

▶ General product information on hydraulic products Data sheet 07008

▶ Installation, commissioning and maintenance of industrial valves Data sheet 07300

▶ Hydraulic valves for industrial applications Data sheet 07600-B

▶ Selection of the filters www.boschrexroth.com/filter





Notes





Notes

Date post:	01-Mar-2022
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Winch control block - Bosch Rexroth

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