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BOSCH REXROTH
ZDB6VP2-4X/100
R900423274
Pressure Relief Valves

Pressure valves: ZDB,Z2DB 6.-4x/

$448.00

BOSCH REXROTH

MATERIAL:  R900423274

SUMMARY:  Pressure valves: ZDB,Z2DB 6.-4x/

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Pressure valves of type ZDB and Z2DB are pilot-operated pressure relief valves in sandwich plate design.

They are used for limiting a system pressure.

The valves basically consist of the housing (7) and one or two pressure valve cartridges.

The system pressure can be set via the adjustment type (4).

 

Example version "VA":

In the initial position the valves are closed. The pressure in channel A acts on the spool (1). At the same time, pressure is applied to the spring-loaded side of the spool (1) via nozzle (2) and to the pilot poppet (6) via nozzle (3). If the pressure in channel A exceeds the value set at the spring (5), the pilot poppet (6) opens.

Hydraulic fluid flows from the spring-loaded side of the spool (1), nozzle (3), channel (8) into channel T. The resulting pressure drop moves the spool (1) and thus opens the connection from A to T while maintaining the pressure set at spring (5).

Die pilot oil drain from the two spring chambers is effected externally, via channel T.

Type ZDB 6 VA2-...

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

➀ = component side

➁ = plate side

01

02

03

04

05

06

07

08

09

10

11

12

Z

DB

6

4X

/

*

01

Sandwich plate

Z

02

1 pressure valve cartridge (only with version “VA”, “VB” and “VP”)

no code

2 pressure valve cartridges (only with version “VC” and “VD”)

2

03

Pressure relief valve

DB

04

Size 6

6

Relief function from – to:

05

A – T

VA

P – T

VP

B – T

VB

A – T and B – T

VC

A – B and B – A

VD

Adjustment type for pressure adjustment

06

Rotary knob

1

Sleeve with hexagon and protective cap

2

Lockable rotary knob with scale

31)

Rotary knob with scale

7

07

Component series 40 … 49 (40 … 49: unchanged installation and mounting dimensions)

4X

Pressure rating

08

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

Corrosion resistance

09

None

no code

Improved corrosion protection (240 h salt spray test according to EN ISO 9227)

J3 2)

High corrosion protection (720 h salt spray test according to EN ISO 9227)

J5 2)

Seal material

10

NBR seals

no code

FKM seals

V

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

11

Without locating hole

no code

With locating hole

/60 3)

12

Further details in the plain text

*

1) Key with material no. R900008158 is included in the scope of delivery.
2) Only with adjustment type "2", however without protective cap
3) Locking pin ISO 8752-3x8-St, material no. R900005694 (separate order)

general

Size

6

Weight (approx.)

Type ZDB 6

kg

1

Type Z2DB 6

kg

1.2

Installation position

any

Ambient temperature range

°C

-20 … +80

hydraulic

Size

6

Maximum operating pressure

bar

315

Maximum counter pressure 1)

bar

315

Maximum set pressure

bar

50
100
200
315

Maximum flow

l/min

60

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 2)

Class 20/18/15 according to ISO 4406 (c)
1) Observe the maximum tank pressure of the subplate-mounted valve/directional valve
2) 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 oil

HL, HLP

FKM, NBR

DIN 51524

90220

Bio-degradable

1)​

Insoluble in water

HETG

FKM

ISO 15380

90221

HEES

FKM

Soluble in water

HEPG

FKM

ISO 15380

Flame-resistant

Water-free

HFDU (glycol base)

FKM

ISO 12922

90222

HFDU (ester base)

1)

FKM

HFDR

FKM

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 ignition temperature of the hydraulic fluid used must be 50 K higher than the maximum surface temperature. Flame-resistant – containing water: Maximum pressure differential 210 bar, otherwise, increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 … 100% Maximum hydraulic fluid temperature 60 °C Bio-degradable and flame-resistant: If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system.
1) Not recommended for corrosion-protected version "J3" and "J5" (contains zinc)

For applications outside these parameters, please consult us!

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

pE-qV characteristic curves

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

pE min-qV characteristic curves

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

Notice:

The characteristic curves apply to the pressure at the valve output p = 0 bar across the entire flow range.

Type ZDB 6 VA...

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

Type ZDB 6 VB...

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

Type ZDB 6 VP...

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

Type Z2DB 6 VC...

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

Type Z2DB 6 VD...

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

➀ = component side

➁ = plate side

 

Version "VA"

(dimensions im mm)

Dimensions in mm

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

1

Name plate

2

Adjustment type "1"

3

Adjustment type "2" (with version "J3" and "J5" without protective cap)

4

Adjustment type "3"

5

Adjustment type "7"

6

Dimensions required to remove the key

7

Valve mounting bores

8

Lock nut SW24, tightening torque MA = 10+5 Nm

9

Hexagon SW10

10

Identical seal rings for ports A, B, P, T (plate side)

11

Hexagon SW24, tightening torque MA = 50 Nm

12

plate side – Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, material no. R900005694, separate order)

13

component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø4 x 4 mm deep)

Version "VB" and "VP"

(dimensions im mm)

Dimensions in mm

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

1

Name plate

2

Adjustment type "1"

3

Adjustment type "2" (with version "J3" and "J5" without protective cap)

4

Adjustment type "3"

5

Adjustment type "7"

6

Dimensions required to remove the key

7

Valve mounting bores

8

Lock nut SW24, tightening torque MA = 10+5 Nm

9

Hexagon SW10

10

Identical seal rings for ports A, B, P, T (plate side)

11

Hexagon SW24, tightening torque MA = 50 Nm

12

plate side – Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, material no. R900005694, separate order)

13

component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø4 x 4 mm deep)

Version "VC" and "VD"

(dimensions im mm)

Dimensions in mm

technical illustration-ZDB6VP2-4X/100-Pressure valves: ZDB,Z2DB 6.-4x/

1

Name plate

2

Adjustment type "1"

3

Adjustment type "2" (with version "J3" and "J5" without protective cap)

4

Adjustment type "3"

5

Adjustment type "7"

6

Dimensions required to remove the key

7

Valve mounting bores

8

Lock nut SW24, tightening torque MA = 10+5 Nm

9

Hexagon SW10

10

Identical seal rings for ports A, B, P, T (plate side)

11

Hexagon SW24, tightening torque MA = 50 Nm

12

plate side – Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, material no. R900005694, separate order)

13

component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø4 x 4 mm deep)

14.1

Version “VC”

14.2

Version “VD”

Valve mounting screws (separate order)

Version „J3“
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9-CM-Fe-ZnNi-5-Cn-T0-H-B
friction coefficient μtotal = 0,09 … 0,14
tightening torque MA = 7,4 Nm ± 10 %
Version „J5“
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9-CM-Fe-ZnNi-8-Cn-T0-H-B
friction coefficient μtotal = 0,09 … 0,14
tightening torque MA = 7,4 Nm ± 10 %
Without corrosion protection
4 hexagon socket head cap screws ISO 4762 - M5 - 10.9
friction coefficient μtotal = 0,12 … 0,17
tightening torque MA = 8,1 Nm ± 10 %