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BOSCH REXROTH
DBDS2K2X/315
R900203853
Pressure Relief Valves

Pressure valves: DBD* 2 K2x/

$335.00

BOSCH REXROTH

MATERIAL:  R900203853

SUMMARY:  Pressure valves: DBD* 2 K2x/

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Function, section, symbol

 

Pressure valves of type DBD .. K are direct operated pressure relief valves to be installed in block designs. They are used for system pressure limitation. The system pressure can be set via the adjustment type (5).

In the initial position the valve is closed. Via control line (1) and ball (2), the pressure in the main port ① acts on the spring plate (3). If the pressure in the main port ① rises above the value set at the compression spring (4), the ball (2) opens and the hydraulic fluid flows into the main port ②.

technical illustration-DBDS2K2X/315-Pressure valves: DBD* 2 K2x/technical illustration-DBDS2K2X/315-Pressure valves: DBD* 2 K2x/

Main port 1 (P)

Main port 2 (T)

01

02

03

04

05

06

07

08

09

DBD

2

K

2X

/

V

*

01

Pressure relief valve, direct controlled

DBD

Adjustment type

02

Hexagon with protective cap

S

Rotary knob with scale

L

Lockable rotary knob with scale

A

Hand wheel

H

03

Size 2

2

04

Screw-in cartridge valve

K

05

Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions)

2X

Pressure rating

06

Set pressure up to 25 bar

25

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

Set pressure up to 420 bar

420

Sealed set pressure (adjustment type “S” only)

07

Unsealed

no code

Sealed – please specify set pressure (setting interval si]5 bar[/si][imp]75 psi[/imp] )

P...1)

Seal material

08

NBR seals

no code

FKM seals

V

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

09

Further details in the plain text

*

1) Order example:
Set pressure 190 bar → DBDS 2 K2X/200P180V

For applications outside these parameters, please consult us!

general

Size

2

Weight (approx.)

kg

0.3

Installation position

any

Ambient temperature range

°C

-20 … +80

hydraulic

Size

2

Maximum operating pressure

Inlet

bar

420

Outlet

bar

315

Maximum set pressure

bar

25
50
100
200
315
420

Maximum flow

l/min

2

Recommended

l/min

1.5

Hydraulic fluid

see table

Hydraulic fluid temperature range

°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

Data sheet

Mineral oils

HL, HLP, HLPD, HVLP, HVLPD

NBR, FKM

DIN 51524

90220

Bio-degradable

Insoluble in water

HETG

NBR, FKM

ISO 15380

90221

HEES

FKM

Soluble in water

HEPG

FKM

ISO 15380

Flame-resistant

Water-free

HFDU, HFDR

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 solenoid surface temperature.

Flame-resistant – containing water:

Maximum pressure differential per control edge 50 bar. Pressure pre-loading at the tank port >20 % of the pressure differential; otherwise, increased cavitation. Life cycle compared to operation with mineral oil HL, HLP 50 to 100 %

Bio-degradable and flame-resistant: When using hydraulic fluids that are simultaneously zinc-solving, zinc may accumulate (per pole tube 0.7 g zinc).

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

p-qV characteristic curves

technical illustration-DBDS2K2X/315-Pressure valves: DBD* 2 K2x/

Notice:

The characteristic curves apply to output pressure = zero in the entire volume flow range and were measured without housing resistance.

General information

 

Hydraulic counter pressures in the main port ➁ (T) add 1:1 to the response pressure of the valve set at the adjustment.

Example:

Pressure adjustment of the valve due to spring preloading (item 4 on product description) pspring = 200 bar Hydraulic counter pressure in the main port ➁ (T): phydraulic  = 50 bar

⇒ Response pressure = pspring + phydraulic = 250 bar

Dimensions in mm

technical illustration-DBDS2K2X/315-Pressure valves: DBD* 2 K2x/

Mounting cavity: R/DBD . 2K; 2 main ports; thread M24 x 1.5

Dimensions in mm

technical illustration-DBDS2K2X/315-Pressure valves: DBD* 2 K2x/
1) Depth of fit
2) Visual inspection