BOSCH REXROTH
ZDR6DP1-4X/210YMV/12
R978909631
Pressure Reducing Valves

Pressure valves: ZDR 6.-4x/

$564.00

BOSCH REXROTH

MATERIAL:  R978909631

SUMMARY:  Pressure valves: ZDR 6.-4x/

Quantity in stock: 1

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The valve type ZDR is a direct operated pressure reducing valve in sandwich plate design with pressure limitation of the secondary circuit. It is used to reduce the system pressure.

The pressure reducing valve basically comprises housing (1), control spool (2), compression spring (3), adjustment type (4) and an optional check valve.

The secondary pressure is set via the adjustment type (4).

 

Version "A"

The valve is open in initial position. Hydraulic fluid can flow from channel A➀ to channel A➀ without restrictions. The pressure in channel A➀ is simultaneously applied via the control line (5) at the piston area opposite the compression spring (3). If the pressure in channel A➀ exceeds the value set at the compression spring (3), the control spool (2) is pushed against the compression spring (3) to control position and keeps the set pressure in channel A➀ at a constant level.

Control signal and pilot oil are supplied internally via the control line (5) from channel A➁.

If the pressure in channel A➀ increases further due to an external force effect at the actuator, it pushes the control spool (2) even further against the compression spring (3).

In this way, channel A➀ is connected to the tank via the control edge (9) at the control spool (2) and the housing (1). So much hydraulic fluid is discharged into the tank that the pressure does not increase any further.

The leakage oil drain from the spring chamber (7) is always effected externally via the bore (6) and channel T (Y).

A pressure gauge connection (8) allows for the control of the secondary pressure at the valve.

A check valve can be used for free flow back from channel A➀ to A➀ with version “A”.

 

Versions “P” and “B”

For version “P”, the pressure reduction is effected in channel P➀. Control signal and pilot oil are supplied internally from channel P➀.

For version “B”, the pressure is reduced in channel P➀; but the pilot oil is extracted from channel B.

 

Notice:

If the directional valve is in spool position P to A, the pressure in channel B may not exceed the set secondary pressure. Otherwise, there is pressure reduction in channel A.

Type ZDR 6 DA1-4X/.YM…

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

component side

plate side

01

02

03

04

05

06

07

08

09

10

11

12

13

14

Z

DR

6

D

4X

/

Y

*

01

Sandwich plate valve

Z

02

Pressure reducing valve

DR

03

Size 6

6

04

Direct operated

D

05

Pressure reduction in channel A➁

A

Pressure reduction in channel B➁

B

Pressure reduction in channel P➁

P

Adjustment type

06

Rotary knob

1

Sleeve with hexagon and protective cap ("J3" version without protective cap)

2

Lockable rotary knob with scale

3 1)

Rotary knob with scale

7

07

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

4X

08

Secondary pressure up to 25 bar

25

Secondary pressure up to 75 bar

75

Secondary pressure up to 150 bar

150

Secondary pressure 210 bar

210

Secondary pressure up to 315 bar (only version "B", "P", and "2")

315

09

Internal pilot oil supply, external pilot oil return

Y

10

With check valve (only version "A")

no code

Without check valve

M

Corrosion resistance

11

None

no code

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

J3

Seal material

12

NBR seals

no code

FKM seals

V

Observe compatibility of seals with hydraulic fluid used.

13

Without locating hole

no code

With locating hole

/60 2)

With locating hole and locking pin ISO 8752-3x8-St

/62

13

Further details in the plain text

*

1) H-Key with material no. R900008158 is included in the scope of delivery.
2) Locking pin ISO 8752-3x8-St, material no. R900005694 (separate order)

Notes:

For valve types for use in potentially explosive areas, refer to data sheet 07011. Preferred types and standard units are contained in the EPS (standard price list).

general

Size

6

Weight (approx.)

kg

1.2

Installation position

any

Ambient temperature range

NBR seals

°C

-30 … +80

FKM seal

°C

-20 … +80

MTTFD values according to EN ISO 13849 1)

Years

​150 … ​1,200
1) For further details, see data sheet 08012

hydraulic

Size

6

Maximum operating pressure (Input)

Version "B", "P"

bar

350

Version "A"

bar

315

Maximum secondary pressure 1)

Outlet

bar

25
75
150
210
315

Maximum counter pressure

Port T (Y)

bar

160

Maximum flow

l/min

50

Hydraulic fluid

see table

Hydraulic fluid temperature range

NBR seals

°C

-30 … +80

FKM seal

°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) 315 bar only with version “B” and “P”
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 oils

HL, HLP, HLPD

NBR, FKM

DIN 51524

90220

Bio-degradable

1)

Insoluble in water

HETG

NBR, 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 1)

FKM

Containing water

1)

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

NBR

ISO 12922

90223

Important information on hydraulic fluids:

For more information and data on the use of other hydraulicfluids, 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
1) In connection with the corrosion-protected version “J3”, small amounts of dissolved zinc may get into the hydraulic system.

For applications outside these parameters, please consult us!

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

pA-qV characteristic curves

Version "A"

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

pA-qV characteristic curves

Version "B" and "P"

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Δpmin-qV characteristic curves

Version "A"

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Δpmin-qV characteristic curves

Version "B" and "P"

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Δp-qV characteristic curves

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Notices:

The curve development is maintained if the pressure is set lower according to the pressure rating. The characteristic curves apply to the pressure at the valve output pT = 0 bar across the entire flow range.

Version "P...YM"

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Version "A...YM"

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Version "B…YM"

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Version "A...Y"

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

component side

plate side

Version "A"

Dimensions in mm

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/
technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Required surface quality of the valve contact surface

component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep)

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)

1

Name plate

2

Adjustment type "1"

3

Adjustment type "2"

4

Adjustment type "3"

5

Adjustment type "7"

6

Space required to remove the key

7

Valve mounting bores

8

Lock nut SW24

9

Hexagon SW10

10

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

11

Pressure gauge connection G1/4; 12 mm deep; internal hexagon SW6

Valve mounting screw (separate order)

4 hexagon socket head cap screws ISO 4762-M5-10.9

 

Notices:

Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve. The dimensions are nominal dimensions which are subject to tolerances.

Version "B" and "P"

Dimensions in mm

technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/
technical illustration-ZDR6DP1-4X/210YMV/12-Pressure valves: ZDR 6.-4x/

Required surface quality of the valve contact surface

component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep)

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)

1

Name plate

2

Adjustment type "1"

3

Adjustment type "2"

4

Adjustment type "3"

5

Adjustment type "7"

6

Space required to remove the key

7

Valve mounting bores

8

Lock nut SW24

9

Hexagon SW10

10

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

11

Pressure gauge connection G1/4; 12 mm deep; internal hexagon SW6

Valve mounting screw (separate order)

4 hexagon socket head cap screws ISO 4762-M5-10.9

 

Notices:

Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve. The dimensions are nominal dimensions which are subject to tolerances.

Denomination

Part number

Protective cap

R900135501