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0811402182

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BOSCH

MATERIAL:  0811402182

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The valves of type ZDRE are electrically pilot-operated 3-way pressure reducing valves with pressure limitation of the actuator. They are used for reducing a system pressure.

Technical set-up:

The valve consists of three main assemblies:

Pilot control valve (1) Proportional solenoid (2) Main valve (3) with main control spool (4)

Function:

General function:

Command value-dependent setting of the pressure to be reduced in channel P1 via the proportional solenoid (2). In the depressurized port P, the spring (17) holds the main control spool (4) in the initial position. Thus, opening the connection from P1 to T and blocking of the connection from P to P1. Pressure connection from port P to the ring channel (5). Pilot oil flows from the bore (6) to port T, via the flow controller (7), the nozzle (8) to the pilot control valve (1), the throttle gap (9) to the longitudinal groove (10) and the bores (11, 12).

Pressure reduction:

Build-up of the pilot pressure in the control chamber (16) as function of the command value. Movement of the main control spool (4) to the right, hydraulic fluid flows from P to P1. Actuator pressure present in port P1 to the spring chamber (15) via channel (13) and nozzle (14). Increase in the pressure in port P1 to the set pressure of the pilot control valve (1) leads to the movement of the main control spool (4) to the left. Pressure in port P1 is almost identical with the set pressure at the pilot control valve (1).

Pressure limitation:

If the pressure in port P1 exceeds the set pressure of the pilot control valve (1), the main control spool (4) is moved further to the left. This opens the connection from P1 to T and limits the pressure present in port P1 to the set command value. technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

The valves of type ZDREE are electrically pilot-operated 3-way pressure reducing valves with pressure limitation of the actuator. They are used for reducing a system pressure.

Technical set-up:

The valve consists of three main assemblies:

Pilot control valve (1) Proportional solenoid (2) with control electronics (18) Main valve (3) with main control spool (4)

Function:

General function:

Command value-dependent setting of the pressure to be reduced in channel P1 via the proportional solenoid (2). In the depressurized port P, the spring (17) holds the main control spool (4) in the initial position. Thus, opening the connection from P1 to T and blocking of the connection from P to P1. Pressure connection from port P to the ring channel (5). Pilot oil flows from the bore (6) to port T, via the flow controller (7), the nozzle (8) to the pilot control valve (1), the throttle gap (9) to the longitudinal groove (10) and the bores (11, 12). Supply and command value voltage or command value current are applied to the connector (19). At the factory, the command value pressure characteristic curve is adjusted with little manufacturing tolerance.

Pressure reduction:

Build-up of the pilot pressure in the control chamber (16) as function of the command value. Movement of the main control spool (4) to the right, hydraulic fluid flows from P to P1. Actuator pressure present in port P1 to the spring chamber (15) via channel (13) and nozzle (14). Increase in the pressure in port P1 to the set pressure of the pilot control valve (1) leads to the movement of the main control spool (4) to the left. Pressure in port P1 is almost identical with the set pressure at the pilot control valve (1).

Pressure limitation:

If the pressure in port P1 exceeds the set pressure of the pilot control valve (1), the main control spool (4) is moved further to the left. This opens the connection from P1 to T and limits the pressure present in port P1 to the set command value. technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

Z

DRE

6

1X

/

M

G24

*

01

Sandwich plate

Z

02

Proportional pressure reducing valve

DRE

03

For external analog electronics

no code

With integrated electronics

E

04

Size 6

6

Pressure reduction

05

in channel A (subplate mounting)

no code

In channel P (sandwich plate valve)

VP

Position of the mating connector (omitted in case of subplate mounting)

06

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

1

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

2

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

3

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

4

07

Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions)

1X

Pressure rating

08

50 bar

50

100 bar

100

210

315 bar

315 1)

09

Without check valve

M

Power supply

10

Direct voltage 24 V

G24

11

With manual override

N9

Without manual override

no code

Electrical connection

12

For type ZDRE:

Without mating connector; connector DIN EN 175301-803

K4

For type ZDREE:

Without mating connector; connector M12

K24

Electrical interface

13

Command value 0 … 10 V

A1

Command value 4 to 20 mA

F1

For type ZDRE:

no code

Seal material

14

NBR seals

M

FKM seals

V

15

Further details in the plain text

*

For applications outside these parameters, please consult us!

general

Type

ZDRE ZDREE

Size

6

Component series

1X

Installation position

Any

Weight

kg

2 2.1

Storage temperature range

°C

-20 … +80

Ambient temperature range

°C

-20 … +70

hydraulic

Type

ZDRE ZDREE

Size

6

Maximum operating pressure

bar

315

Maximum operating pressure

Port P

bar

315

Port P1

bar

210

Port P2

bar

315

Port A

bar

210

Port B

bar

210

Port T

separate and depressurized to the tank

Maximum set pressure in ports P1 and A

Pressure rating 50 bar

bar

50

Pressure rating 100 bar

bar

100

Pressure rating 210 bar

bar

210

Pressure rating 315 bar 1)

bar

315

Minimum set pressure 2)

See characteristic curves

Pilot flow

l/min

0.65

Maximum flow

l/min

30

Hydraulic fluid

see table

Hydraulic fluid temperature range

°C

-20 … +80

Viscosity range

mm²/s

15 … 380

Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 3)

Class 20/18/15 according to ISO 4406 (c)

Hysteresis 4)

%

± 2.5

Repetition accuracy 4)

%

< ± 2

Linearity 4)

%

± 3.5

Manufacturing tolerance of the command value pressure characteristic curve 5)

%

± 2 ± 3

Step response 6)

10 ... 90%

ms

≈ 150

90 ... 10%

ms

≈ 150
1) Only available for "Z" version
2) with command value 0 in channels P1 and A
3) 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.
4) Of the maximum set pressure
5) of the maximum set pressure, related to the hysteresis characteristic curve, pressure increasing
6) measured with 1 liter standing hydraulic fluid column

Hydraulic fluid

Classification

Suitable sealing materials

Standards

Mineral oils and related hydrocarbons

HL, HLP

NBR / FKM

DIN 51524

Bio-degradable   - insoluble in water

HETG

NBR / FKM

VDMA 24568

HEES

FKM

Bio-degradable   - soluble in water

HEPG

FKM

VDMA 24568

Flame-resistant   - water-free

HFDU, HFDR

FKM

ISO 12922

Flame-resistant   - containing water

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

NBR

ISO 12922

Important information on hydraulic fluids:

For more information and data on the use of other hydraulic fluids please contact us.

The flash point of the process and operating medium used must be 40 K over the maximum solenoid surface temperature.

There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.).

Flame-resistant   - containing water

Maximum operating pressure of 210 bar

Maximum hydraulic fluid temperature 60 °C

Expected life cycle as compared to HLP hydraulic oil 30% to 100%

electrical

Type

ZDRE ZDREE

Voltage type

Direct voltage

Power supply

Nominal voltage

24 V 24 VDC

Lower limit value

VDC

18

Upper limit value

VDC

35

Minimum control current

mA

100

Maximum control current

mA

1600

Solenoid coil resistance

Cold value at 20 °C

Ω

5

Solenoid coil resistance

Maximum hot value

Ω

7.5

Duty cycle

%

100

Current consumption

A

1.5

Required fuse protection

2 A, time-lag

Inputs

Voltage

V

0 … 10

Current

mA

4 … 20

Outlet

Actual current value

1 mV ≙ 1 mA

Protection class according to DIN EN 60529

IP65 (with mating connector mounted and locked)

Conformity

EN 61000-6-2: 2011-06, EN 61000-6-3: 2011-09

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

Pressure in port A dependent on the command value (manufacturing tolerance); without flow

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)
1) With type (Z)DRE, the manufacturing tolerance at the external amplifier can be adjusted using the command value attenuator potentiometer "Gw". With the digital amplifier, the setting is made using the "Limit" parameter. In this connection, the control current according to the technical data must not be exceeded! In order to match several valves to the same characteristic curve, at a command value of 100%, the pressure must not exceed the maximum set pressure of the relevant pressure rating at no valve.

Type (Z)DRE: Pressure in port P1 or A dependent on the command value

Pressure rating 50 bar

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 100 bar

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 210 bar

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 315 bar

ZDRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 50 bar

(Z)DREE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 100 bar

(Z)DREE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 210 bar

(Z)DREE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 315 bar

ZDREE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Minimum set pressure in port P1 or A with command value 0 V

(without counter pressure in channel T)

Pressure rating 50 bar

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 100 bar / 210 bar

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 315 bar

ZDRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure in channel P1 or A – flow

Pressure rating 50 bar

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 100 bar

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 210 bar

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Pressure rating 315 bar

ZDRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Δp-qV characteristic curves

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Δp-qV characteristic curves

(Z)DRE

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Notice:

The indicated Δp value corresponds to the minimum pressure available in port P (P2) minus the maximum pressure to be controlled in port A (P1).

Type ZDRE 6 VP...

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Type ZDREE 6 VP...

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

(Z)DREE 6...1X

Pin assignment

Contact

Assignment interface "A1"

Assignment interface "F1"

Power supply

1

24VDC(u(t)= 21 ...35V);Imax ≤ 1,5 A

Command value input

2

0 ... 10 V; Re = 20 kΩ

4 ... 20 mA; Re = 100 kΩ

Reference potential actual value

3

0 V

Differential amplifier input (command value)

4

Reference potential command value

M12 plug-in connector port

Connector on amplifier

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Mating connector and wire colors with pre-assembled cable set

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Connection at the connector

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Connection at mating connector

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Connection cable

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)
1) Connection cable:- Recommendation 6-wire, 0.75 or 1mm2 plus protective earthing conductor and screening- Connect screening to PE on supply side only- Maximum admissible length 100 m The minimum supply voltage at the power supply unit depends on the length of the supply line (see diagram)

Type ZDRE

Dimensions in mm

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

1

Proportional solenoid without manual override

2

Name plate

3

Valve housing

4

Identical seal rings for ports A, B, P, and T

5

mating connector according to DIN EN 175301-803

6

Space required to remove the mating connector

7

Machined valve contact surface; Porting pattern according to ISO 4401-03-02-0-05

8

Proportional solenoid with manual override

Type ZDREE

Dimensions in mm

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

1

Proportional solenoid without manual override

2

Name plate

3

Valve housing

4

Identical seal rings for ports A, B, P, and T

5

mating connector according to DIN EN 175301-803

6

Space required to remove the mating connector

7

Machined valve contact surface; Porting pattern according to ISO 4401-03-02-0-05

8

Proportional solenoid with manual override

9

Integrated electronics (OBE)

Notice:

The dimensions are nominal dimensions which are subject to tolerances.

Recommended valve mounting screws (separate order):

4 hexagon socket head cap screws ISO 4762 - M5 - 10.9-flZn-240h-L

Tightening torque MA = 7 Nm ± 10%

Mating connectors for valves with connector “K4”, without circuitry, standard

3P Z4

technical illustration-0811402182-Pilot-operated pressure reducing valve in ports A and P1 with pressure limitation Operation by means of a proportional solenoid For subplate mounting or sandwich plate design: Porting pattern according to ISO 4401-03-02-05 Minimum set pressure in ports A or P1 Type ZDREE with integrated electronics (OBE)

Mating connectors for valves with connector “K4”, without circuitry, standard

3P Z4

For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)

Data sheet

Spare parts & repair