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BOSCH REXROTH
L-DB150F2-3X/16
R900346976
Pressure Relief Valves

Pressure valves: L-DB

$24,783.00

BOSCH REXROTH

MATERIAL:  R900346976

SUMMARY:  Pressure valves: L-DB

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Pressure valves of type L–DB are pilot-operated pressure relief valves for a low preload pressure. They are suitable for high flows.

The valves basically consist of pipeline installation housing (1), main spool guide (2) for accepting the pilot control valve (5) and main spool (3).

Type L–DB

The pressure applied to channel P acts on the main spool (3) and is simultaneously applied to the pilot control valve (5) via nozzles (4) and (6). If the pressure in channel P exceeds the value set at the pilot control valve (5), the latter opens and the pilot oil is directly discharged into channel Y (7).

The main spool (3) moves upwards against the springs (8) and (9) and connects channel P to channel T as long as the pressure exceeds the value set at the pilot control valve.

With version “U”, the main spool (3) is only kept closed by the external spring (9). If the control channel is unloaded, a lower circulation pressure can be achieved.

Type L–DBF

In principle, the function of version “L–DBF” corresponds to the function of type L–DB. The valve is, however, designed as cartridge valve without pipeline housing (1).

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB

01

02

03

04

05

06

07

08

09

10

11

L–DB

2

3X

/

*

01

Pressure relief valve

L–DB

02

Pipeline installation

no code

Cartridge valve (only size 50 … 200)

F

03

Size 40

40

Size 50

50

Size 65

65

Size 80

80

Size 100

100

Size 125

125

Size 150

150

Size 200

200

Size 250

250

Size 300

300

04

Flange connection according to DIN EN 1092-2 type 21

 

F

Cartridge valve

no code

Adjustment type

05

Sleeve with hexagon and protective cap

2

06

Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions)

3X

Set pressure

07

Up to 16 bar

16

Up to 25 bar (only size 80, 100 and 150)

25

Pilot oil flow

08

Internal pilot oil supply, external pilot oil return

Y

External pilot oil supply, external pilot oil return

XY

09

Standard version

no code

Valve for minimum cracking pressure

U

Seal material

10

NBR seals

no code

FKM seals

V

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

11

Further details in the plain text

*

general

Size

40 50 65 80 100 125 150 200 250 300

Weight

kg

11 15 26 32 50 75 100 180 300 475

Installation position

any

Ambient temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-15 … +80

hydraulic

Size

40 50 65 80 100 125 150 200 250 300

Maximum operating pressure

Port P

bar

16 16
25
16 16
25
16

Port X

bar

16 16
25
16 16
25
16

Port T

bar

16 16
25
16 16
25
16

Maximum counter pressure

Port Y

bar

16 16
25
16 16
25
16

Maximum flow

l/min

1000 1500 2700 3600 6000 7000 13000 24000 35000 50000

Hydraulic fluid

see table

Hydraulic fluid temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-15 … +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

Data sheet

Mineral oils

HL,HLP

NBR, FKM

DIN 51524

90220

Bio-degradable

2)

Insoluble in water

HETG

FKM

ISO 15380

90221

HEES

FKM

Soluble in water

HEPG

FKM

ISO 15380

Containing water

2)

Water-free

HFDU

FKM

ISO 12922

90222

Containing water

HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620)

NBR

ISO 12922

90223

Important information on hydraulic fluids:

For further information and data on the use of other hydraulic fluids, please refer to the data sheets above 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 valve surface temperature.

Flame-resistant – containing water:

Life cycle compared to operation with mineral oil HL, HLP 30 to 100 %

For applications outside these parameters, please consult us!

Notice:

The maximum operating pressure is the sum of the set pressure and counter pressure!

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

Minimum set pressure dependent on the flow

Size 40 … 80

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB

Minimum set pressure dependent on the flow

Size 100 … 200

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB

Notice:

The characteristic curves were simulated with external, depressurized pilot oil return.

Minimum set pressure dependent on the flow

Size 250 and 300

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB

Type L–DB…Y…

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB

Type L–DB…XY…

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB

Pipeline installation “L–DB”

Dimensions in mm

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB

1

Name plate (position may vary depending on the size)

2

Ports X for external pilot oil supply

3

Ports Y for external pilot oil return

4

Adjustment type "2"

5

Valve mounting bores

6

Ring bolt (2 pieces from NG50)

NG

L1

L2

L3

L4

L5

L6

H1

H2

H3

H4

B1

B2

ØD1

ØD3

ØD4

ØD5

ØD6

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

40 198 ± 2 99 68 42.5 77.5 117 139 127 97.5 - 13 95 40 110 150 19 96
50 228 ± 2 114 68 42.5 75 125 147 135 105.5 36 15 100 50 125 165 19 110
65 288 ± 3 144 65 52 92 155 183 167 130 36 15 125 65 145 185 19 134
80...16 308 ± 3 154 65 52 100 170 195.5 179.5 142.5 36 17 140 80 160 200 19 152
80...25 308 ± 3 154 65 52 100 170 195.5 179.5 142.5 36 14 140 80 160 200 19 152
100...16 348 ± 3 174 65 52 111 191 220 200 163 36 19 160 100 180 220 19 182
100...25 348 ± 3 174 65 52 111 191 220 200 163 36 14 160 100 190 235 23 182
125 398 ± 3 199 67 50.5 122.5 245 247.5 227.5 190.5 53 21 - 125 210 250 19 215
150...16 478 ± 3 239 65 53 138 276 265 245 208 53 21 - 150 240 285 23 245
150...25 478 ± 3 239 65 53 138 276 265 245 208 53 14 - 150 250 300 28 245
200 598 ± 4 299 65 59 170 340 314 294 257 53 25 - 200 295 340 23 305
250 728 ± 4 364 57 67 205 410 357 333 296 62 27 - 250 355 405 28 370
300 848 ± 5 424 50 73.5 237.5 475 398 374 337 62 26 - 300 410 460 28 435

Notice:

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

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Cartridge valve “L–DBF”

Dimensions in mm

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB

1

Name plate (position may vary depending on the size)

2

Ports X for external pilot oil supply

3

Ports Y for external pilot oil return

4

Adjustment type "2"

6

Ring bolt (2 pieces from NG50)

NG

L3

L4

L5

L6

H4

H5

H6

B2

mm

mm

mm

mm

mm

mm

mm

mm

50 68 42.5 75 125 36 60.5 24.5 100
65 65 52 92 155 36 75.5 32 125
80 65 52 100 170 36 76 32 140
100 65 52 111 191 36 76 32 160
125 67 50.5 122.5 245 53 82 38 -
150 65 53 138 276 53 79 35 -
200 65 59 170 340 53 82 37 -

NG

L1

L2

L3

L4

L5

L6

L7

ØD1

ØD3

ØD4

ØD5

ØD6

ØD7

G

α

β

n

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

°

°

50 67.5 65.5 50 40.5 35 15 23 110 57 73 89 86 50 M12 45 90 4
65 83.5 81.5 60 55.5 45 20 29 134 75 89 105 105 65 M12 45 90 4
80 94.5 92.5 65 65.5 55 20 29 152 95 104 120 130 80 M16 45 90 4
100 114.5 112.5 76 75.5 67 30 38 182 109 128 148 160 100 M20 45 90 4
125 135 133 100 100.5 90 27 34 215 135 156 176 200 125 M20 30 60 6
150 153.5 151.5 110 110.5 105 27 34 245 160 183 203 230 150 M20 22.5 45 8
200 197 193 130 155.5 155 27 34 305 220 235 265 320 200 M20 15 30 12

Standards:

Workpiece edges

DIN ISO 13715

Form and position tolerance

DIN EN ISO 1101

General tolerances for metal-cutting procedures

DIN ISO 2768–mK

Tolerance

DIN ISO 8015

Surface condition

DIN EN ISO 1302

Type L–DB (not included in the scope of delivery)

NG

Quantity

Hexagon screw

1)

Hexagon nut

MA in Nm

2)

40

4

Hexagon screw ISO 4018 - M16 - 4.6

Hexagon nut ISO 4032-M16

63

50

4

Hexagon screw ISO 4018 - M16 - 4.6

Hexagon nut ISO 4032-M16

63

65

4

Hexagon screw ISO 4018 - M16 - 4.6

Hexagon nut ISO 4032-M16

63

80

8

Hexagon screw ISO 4018 - M16 - 4.6

Hexagon nut ISO 4032-M16

63

100 3)

8

Hexagon screw ISO 4018 - M16 - 4.6

Hexagon nut ISO 4032-M16

63

100 4)

8

Hexagon screw ISO 4018 - M20 - 4.6

Hexagon nut ISO 4032-M20

123

125

8

Hexagon screw ISO 4018 - M16 - 4.6

Hexagon nut ISO 4032-M16

63

150 3)

8

Hexagon screw ISO 4018 - M20 - 4.6

Hexagon nut ISO 4032-M20

123

150 4)

8

Hexagon screw ISO 4018 - M24 - 4.6

Hexagon nut ISO 4032-M24

213

200

12

Hexagon screw ISO 4018 - M20 - 4.6

Hexagon nut ISO 4032-M20

123

250

12

Hexagon screw ISO 4018 - M24 - 4.6

Hexagon nut ISO 4032-M24

213

300

12

Hexagon screw ISO 4018 - M24 - 4.6

Hexagon nut ISO 4032-M24

213

Type L–DBF (included in the scope of delivery)

NG

Fastening

Assembly aid (from NG80)

5)

Quantity

Hexagon socket head cap screw

Part number

MA in Nm

Hexagon socket head cap screw

Part number

40

4

ISO 4762 - M12 x 70 - 10.9-flZn-240h-L

R913000515

35

50

4

ISO 4762 - M12 x 70 - 10.9-flZn-240h-L

R913000515

35

65

4

ISO 4762 - M16 x 90 - 10.9-flZn-240h-L

R913000544

85

80

4

ISO 4762 - M16 x 90 - 10.9-flZn-240h-L

R913000544

85

ISO 4762 - M16 x 120 - 8.8

R916445155

100

4

ISO 4762 - M20 x 100 - 10.9-flZn-240h-L

R913000386

165

ISO 4762 - M20 x 140 - 8.8

R916445188

125

6

ISO 4762 - M20 x 100 - 10.9-flZn-240h-L

R913000386

165

ISO 4762 - M20 x 160 - 8.8

R916445189

150

8

ISO 4762 - M20 x 100 - 10.9-flZn-240h-L

R913000386

165

ISO 4762 - M20 x 160 - 8.8

R916445189

200

12

ISO 4762 - M20 x 100 - 10.9-flZn-240h-L

R913000386

165

ISO 4762 - M20 x 140 - 8.8

R916445188

250

12

ISO 4762 - M24 x 100 - 10.9-flZn-240h-L

R913000407

285

ISO 4762 - M24 x 190 - 8.8

R916309987

300

14

ISO 4762 - M24 x 100 - 10.9-flZn-240h-L

R913000407

285

ISO 4762 - M24 x 220 - 8.8

R916445211

1) In the selection and design, DIN EN 1092-2 is to be observed
2) Tightening torques have been calculated with hexagon socket head cap screws ISO 4762 (galvanized)
friction coefficient μtotal = 0.09 to 0.14
3) Version “16”
4) Version “25”
5) In each case 2x

Notice:

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

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Installation bore
Dimensions in mm

Dimensions in mm

technical illustration-L-DB150F2-3X/16-Pressure valves: L-DB