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Артикул: RX7617

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4/2 and 4/3 proportional directional valves, pilot-operated, without electrical position feedback, without integrated electronics (OBE), with spool position indicator 4WRZEM

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Description

  • Size 10, 16, 25
  • Component series 1X
  • Maximum operating pressure 350 bar
  • Maximum flow 870 l/min

Features

  • Pilot-operated, 2-stage proportional directional valves with integrated electronics (OBE)
  • Switching position indicator
  • In connection with a contact shut-off, the valve complies with the requirements for safety-related components of a control according to category 4, EN ISO 13849-1:2006
  • Suitable for use in safety-related parts of controls according to category 4, EN ISO 13849-1:2006
  • Control of the direction and magnitude of a flow
  • Operation by means of proportional solenoids with central thread and detachable coil
  • For subplate mounting: Porting pattern according to ISO 4401
  • Optional auxiliary operating device
  • Spring-centered control spool

Product description

Electro-hydraulically actuated proportional directional valves type 4WRZ(E)M…

Valves of type 4WRZ(E)M… are pilot-operated proportional directional valves with spool position indicator. They control the flow direction and size. They are actuated by the proportional solenoids of the pilot control valve.

Set-up:

The valve basically consists of:

  • Pilot control valve (10) with proportional solenoids (5) and (6)
    • Main valve (11) with main control spool (12), valve spring (13) and position indicator (14)
    • With de-energized solenoids (5) and (6), the main control spool (12) is held in the central position by the valve spring (13).
    • By energizing a proportional solenoid, e.g. solenoid "b" (6), the control spool (2) is moved to the right. Pilot oil enters the pressure chamber (15). The generated pressure moves the main control spool (12) proportionally to the electric input signal
    • against the valve spring (13). This opens the connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristics.
    • Depending on the type, pilot oil is internally supplied to the pilot control valve via port P or externally via port X.
    • When the solenoid (6) is switched off, the control spool (2) is returned into the central position by the compression springs (8) . This unloads the pressure chamber (15) towards the tank and the main control spool (12) is returned to the central position by the valve spring (13).
    • Depending on the type, the pilot oil is returned internally from the pilot control valve to the tank via port T or externally via port Y.
    • An optional manual override (16 and 17) allows the control spool (2) and with it the main control spool (12) to be moved.

Function:

Inadvertent activation of the manual override may result in uncontrolled machine movements!

Spool position indicator

The spool positions of the main control spool are detected by the inductive position switch (14) and displayed via two switching outputs with a preset logic. If the fixedly set switching points are exceeded, the deviation from the zero position is displayed within the control spool overlap.

The switching signals can be used in a superior control for monitoring functions.

The electrical connection is implemented separately via a 4-pole connector M12x1 with two pins for signal output and two pins for voltage supply.

Area of application:

The valve may be used in machines with high safety requirements, e.g. hydraulic press control systems.

In connection with a contact shut-off, the valve complies with the requirements for safety-related components of a control according to category 1, EN ISO 13849-1:2006 The "emergency stop" command or an error detected by the machine control has to result in the switching off of the valve supply voltage.

For the valve design the basic and well-tried safety principles according to ISO 13849-2:2003, tables C1 and C2 were used.

The valves are suitable for use in safety-related parts of controls according to category 4, EN ISO 13849-1:2006. This requires the entire control to meet the requirements of category 4, EN ISO 13849-1:2006 as well as the respective requirements of the applicable standards.

Please note chapter "Safety instructions"!

Notice:

The tank line must not be allowed to run empty. With corresponding installation conditions, a preload valve (preload pressure approx. 2 bar) must be installed.

Type code

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

4

WRZEM

1X

/

6E

G24

K31

*

01

4 main ports

4

02

Proportional directional valve with electro-hydraulic operation, integrated electronics and switching position monitoring

WRZEM

03

Size 10

10

Size 16

16

Size 25

25

04

Symbols; for the possible version, see "Symbols/Circuit diagrams"

E; E1-; E3-; W6-; W8-; W9-; EA; W6A

Rated flow NG10

05

25 l/min

25

50 l/min

50

90 l/min

85

Rated flow NG16

05

100 l/min

100

125 l/min

125

150 l/min

150

180 l/min

180

Rated flow NG25

05

220 l/min

220

325 l/min

325

06

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

7X

07

Pilot control valve NG6
Proportional solenoid with detachable coil

6E

08

Supply voltage 24 V

G24

09

Without manual override

no code

With concealed manual override

N9

Pilot oil supply and return

10

External pilot oil supply, external pilot oil return

no code

Internal pilot oil supply, external pilot oil return

E

Pilot oil supply internal, pilot oil return internal

ET

External pilot oil supply, internal pilot oil return

T

Electrical connection

11

Without mating connector, connector according to DIN EN 175201-804

K31

Electrical interface

12

Command value ±10 V

A1

Command value 4 to 20 mA

F1

13

Without pressure reducing valve

no code

With pressure reducing valve ZDR 6 DP0-4X/40YM-W80 (fixedly set)

D3

14

NBR seals

M

FKM seals

V

15

Further details in the plain text

*

Technical data

general

Type

4WRZEM

Size

101625

Installation position

any, preferably horizontal

Ambient temperature range

°C

-20 … +50

Storage temperature range

°C

-20 … +80

Weight

kg

913.720.9

Weight

with "D3"

kg

9.514.221.4

Sine test according to DIN EN 60068-2-6

10 cycles, 10…2000.. 10 Hz with logarithmic frequency changing speed of 1 octave/min, 5 to 57 Hz, amplitude 1.5 mm (p-p), 57 to 2000 Hz, amplitude 10g, 3 axes

Noise test according to DIN EN 60068-2-64

20…2000 Hz, amplitude 0.05g2/Hz (10gRMS) 3 axes, testing time 30 min per axis

Shock test according to DIN EN 60068-2-27

Half-sine 15g / 11 ms, 3 times in positive and 3 times in negative direction per axis, 3 axes

Damp heat according to DIN EN 60068-2-30

Variant 2: +25 °C … +55 °C, 90 % … 97 % relative humidity, 2 cycles á 24 hours

hydraulic

Size

101625

Maximum operating pressure

bar

350

Maximum operating pressure

Port P

bar

315350

Anschluss A

bar

315350

Port B

bar

315350

Operating pressure range

External pilot oil supply

bar

30 … 100

Pilot control valve without "D3", internal pilot oil return

bar

30 … 100

Internal pilot oil supply

bar

100 … 315

Maximum return flow pressure

Port T, external pilot oil return

bar

315250

Port T, internal pilot oil return

bar

30

Port Y

bar

30

Maximum flow

l/min

170460870

Pilot flow

input signal 0 → 100%

Port X and Y

l/min

3.55.57

Pilot volume

switching process 0 → 100%

cm³

1.74.610

Hydraulic fluid

see table

Hydraulic fluid temperature range

°C

-20 … +80

preferably

°C

-40 … +50

Viscosity range

mm²/s

20 … 380

preferably

mm²/s

30 … 46

Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1)

Pilot control valve

Class 18/16/13 according to ISO 4406 (c)

Main valve

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

Hysteresis

%

≤ 6
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.

electrical

Size

101625

Voltage type

Direct voltage

Command value overlap

%

20

Maximum solenoid current

A

2.5

Maximum current consumption

of the amplifier

A

1.8

of the amplifier (impulse current)

A

3

Solenoid coil resistance

Cold value at 20 °C

Ω

2

Maximum hot value

Ω

3

Actuated time

%

100

Maximum coil temperature 1)

°C

+ 150

Protection class according to DIN EN 60529

IP65 (If a suitable and a correctly mounted mating connector are used.)

Power supply

V

24

Supply voltage range

V

19,4 … 35

Command value input

"A1"

V

± 10

Command value input range

"F1"

mA

4 … 20
1)Due to the surface temperatures occurring at the solenoid coils, the European standards ISO 13732-1 and EN 982 need to be adhered to.

Spool position indicator

Principle:

Inductive position switch

Switching point

Within positive valve overlap

Power supply

V

24

Supply voltage tolerance

V

± 4.8

Residual ripple

%

< 10

Current consumption

without load current

mA

≤ 40

Reverse polarity protection

installed, max. 300 V

Outputs

reverse polarity protected, positive switching and short-circuit-proof

Protection class according to DIN EN 60529

IP65 bei montierten Steckern

Duty cycle

%

100

Electrical connection

M12x1, 4-pole; assignment according to DIN EN 60947-5-2

Hydraulic fluid

Classification

Suitable sealing materials

Standards

Mineral oils and related hydrocarbons

HL, HLP

NBR / FKM

DIN 51524

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.

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

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

Flame-resistant - containing water:
Maximum pressure differential per control edge 175 bar
Pressure pre-loading at the tank port > 20 % of the pressure differential, otherwise increased cavitation
Life cycle as compared to operation with mineral oil HL, HLP 50 % to 100 %

Diagrams/characteristic curves

(measured with HLP46, ϑÖl = 40 ±5 °C)

Rated flow 25 l/min at a valve pressure differential of 10 bar

Size 10

Rated flow 50 l/min at a valve pressure differential of 10 bar

Size 10

Rated flow 85 l/min at a valve pressure differential of 10 bar

Size 10

Transition function with stepped electric input signals (ps = 50 bar)

Size 10

Rated flow 100 l/min at a valve pressure differential of 10 bar

Size 16

Rated flow 125 l/min at a valve pressure differential of 10 bar

Size 16

Rated flow 150 l/min at a valve pressure differential of 10 bar

Size 16

Rated flow 180 l/min at a valve pressure differential of 10 bar

Size 16

Transition function with stepped electric input signals (ps = 50 bar)

Size 16

Rated flow 220 l/min at a valve pressure differential of 10 bar

NG25

Rated flow 325 l/min at a valve pressure differential of 10 bar

NG25

Transition function with stepped electric input signals (ps = 50 bar)

NG25

Symbols/Circuit diagrams

Symbols

With symbols E1- and W8-, the following applies:

P → A: qvmax

B → T: qv/2

P → B: qv/2

A → T: qvmax

With symbols E3- and W9-, the following applies:

P → A: qvmax

B → T: blocked

P → B: qv/2

A → T: qvmax

(Differential circuit, piston top at port A)

Notice:
With symbols W6-, W8-, W9- and W6A, there is - in the “0” spool position - a connection from A →T and B → T with less than 2% of the relevant nominal cross-section.

Pilot oil supply

3 spool positions

2 spool positions

(Version ".A)"

Type 4WRZEM...A...

Type 4WRZ …

External pilot oil supply, external pilot oil return

The pilot oil is supplied from a separate control circuit (external). The pilot oil return is not directed into channel T of the main valve, but is separately directed to the tank via port Y (external).

Type 4WRZ …E…

Internal pilot oil supply, external pilot oil return

The pilot oil supply is implemented from channel P of the main valve (internally). The pilot oil return is not directed into channel T of the main valve, but is separately directed to the tank via port Y (external).

In the subplate, port X is to be closed.

Type 4WRZEM...A.../...ET...

Type 4WRZ …ET…

Internal pilot oil supply; internal pilot oil return

The pilot oil supply is implemented from channel P of the main valve (internally). The pilot oil is directly returned to channel T of the main valve (internally).

In the subplate, ports X and Y are to be closed.

Type 4WRZ …T…

External pilot oil supply, internal pilot oil return

The pilot oil is supplied from a separate control circuit (external). The pilot oil is directly returned to channel T of the main valve (internally).

In the subplate, port Y is to be closed.

Electrical connection

Pin assignment

Contact

Assignment interface "A1"

Assignment interface "F1"

Power supply

A

24 VDC (u(t) = 19,4 ... 35 V); Imax = 2 A

B

0 V

C

cannot be used 1)

Differential amplifier input (command value)

D

±10 V command value; Re > 50 kΩ

4 ...20 mA command value; Re > 100 Ω

E

Reference potential command value

F

cannot be used 1)

PE

connected to cooling element and valve housing

1)

Contacts C and F must not be connected!

Switching position indicator

Pin

Signal

Mating connector wire colors

Power supply

1

Ub = + 24 V ± 4,8 V

brown

Switching output 1

2

Switching status 0 (open): < 1.8 VDC

Switching status 1 (closed): > UB-2.5 V< 1.8 VDC

(Limit load Imax = 250 mA)

white

Weight

3

0 V

blue

Switching output 2

4

Switching status 0 (open): < 1.8 VDC

Switching status 1 (closed): > UB-2.5 V< 1.8 VDC

(Limit load Imax = 250 mA)

black

Connection at connector

Switching logics

Dimensions

Size 10

Dimensions in mm

1

Main valve

2

Pilot control valve

3

Dimension for version 4WRZM

4

Dimension for version 4WRZEM

5

Proportional solenoid "a"

6

Proportional solenoid "b"

7

Mating connector "A", color gray, separate order

8

Mating connector "B", color black, separate order

9

Mating connector according to DIN EN 175201-804, separate order

9a

Mating connector for spool position indicator, separate order

10

Concealed manual override “N9”

11

Plug screw for valve with one solenoid

12

Name plate pilot control valve

13

Name plate main valve

14

Integrated electronics (OBE)

15

"D3” pressure reducing valve

16

Identical seal rings for ports A, B, P and T (T1)

17

Identical seal rings for ports X and Y

18

Space required to remove the mating connector

19

Diversion plate

20

Machined valve contact surface; Porting pattern according to ISO 4401-05-05-0-05
- Ports X and Y as required

Recommended valve mounting screws (separate order):

  • 4 hexagon socket head cap screws ISO 4762 - M6 x 45 - 10.9-flZn-240h-L
    • 4 hexagon socket head cap screws ISO 4762 - M6 x 45 - 10.9

Tightening torque MA = 13.5 Nm ± 10 %, material no. R913000258 or

Tightening torque MA = 15.5 Nm ± 10 %

Size 16

Dimensions in mm

1

Main valve

2

Pilot control valve

3

Dimension for version 4WRZM

4

Dimension for version 4WRZEM

5

Proportional solenoid "a"

6

Proportional solenoid "b"

7

Mating connector "A", color gray, separate order

8

Mating connector "B", color black, separate order

9

Mating connector according to DIN EN 175201-804, separate order

9a

Mating connector for spool position indicator, separate order

10

Concealed manual override “N9”

11

Plug screw for valve with one solenoid

12

Name plate pilot control valve

13

Name plate main valve

14

Integrated electronics (OBE)

15

"D3” pressure reducing valve

16

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

17

Identical seal rings for ports X and Y

18

Space required to remove the mating connector

19

Diversion plate

20

Machined valve contact surface; Porting pattern according to ISO 4401-07-07-0-05
Deviating from the standard:
Ports P, A, B, T Ø20 mm
Minimum screw-in depth:
- Ferrous metal 1.5 x Ø
- Non-ferrous metal 2 x Ø

21

Locking pin

Recommended valve mounting screws (separate order):

  • 2 hexagon socket head cap screws ISO 4762 - M6 x 60 - 10.9-flZn-240h-L
    • 4 hexagon socket head cap screws ISO 4762 - M10 x 60 - 10.9-flZn-240h-L

Tightening torque MA = 12.2 Nm ± 10 % , material no. R913000115

Tightening torque MA = 58 Nm ± 20 %, material no. R913000116 or

2 hexagon socket head cap screws ISO 4762 - M6 x 60 - 10.9

Tightening torque MA = 15.5 Nm ± 10 %

4 hexagon socket head cap screws ISO 4762 - M10 x 60 - 10.9

Tightening torque MA = 75 Nm ± 20 %

NG25

Dimensions in mm

1

Main valve

2

Pilot control valve

3

Dimension for version 4WRZM

4

Dimension for version 4WRZEM

5

Proportional solenoid "a"

6

Proportional solenoid "b"

7

Mating connector "A", color gray, separate order

8

Mating connector "B", color black, separate order

9

Mating connector according to DIN EN 175201-804, separate order

9a

Mating connector for spool position indicator, separate order

10

Concealed manual override “N9”

11

Plug screw for valve with one solenoid

12

Name plate pilot control valve

13

Name plate main valve

14

Integrated electronics (OBE)

15

"D3” pressure reducing valve

16

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

17

Identical seal rings for ports X and Y

18

Space required to remove the mating connector

19

Diversion plate

20

Machined valve contact surface; Porting pattern according to ISO 4401-08-08-0-05 (ports X and Y as required)

21

Locking pin

Recommended valve mounting screws (separate order):

  • 6 hexagon socket head cap screws ISO 4762 - M12 x 60 - 10.9-flZn-240h-L
    • 6 hexagon socket head cap screws ISO 4762 - M12 x 60 - 10.9

Tightening torque MA = 100 Nm ± 20 %, material no. R913000121 or

Tightening torque MA = 130 Nm ± 20 %

Project planning information

Notes for project planning, installation and commissioning

When implementing safety-related controls comply with the applicable industry-specific standards and regulations.

Due to the flexible use of valves in systems, the user has to check and ensure that the product properties comply with all functional and safety requirements of the overall system.

Make sure that there are no switching shocks and that the valve spool does not vibrate.

Valves with switching position indicator may only be installed, adjusted, commissioned and maintained by specialists trained in hydraulics and electronics.

Improper work at safety-related parts of controls may result in personal injury and damage to property!

The following applies to all work carried out at the valve:

Valves with switching position indicator must not be disassembled.

Parts of the valves must not be exchanged.

Integrated throttles must not be removed or modified.

The spool position indicator may only be adjusted by the valve manufacturer.

Accessories

Mating connectors for valves with round connector, 6-pole + PE

7P Z31

Mating connectors for valves with round connector, 6-pole + PE

7P Z31

  • For valves with round connector according to EN 175201-804, 6-pole + PE as well as 6-pole, compatible with VG 95328

Ordering codes

Downloads

4/2, 4/3 proportional directional valve, pilot operated, w/o electric position feedback without/with integrated electronics (OBE), with spool position indicator
Data Sheet | RE29117 | 2013-08-31 | English | PDF | 1.2MB

Product Groups: Pilot-operated
4WRZ(E)M and 4WRHM

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Двухходовой патронный клапан с активным управлением LC2A Bosch Rexroth представляет собой прецизионное гидравлическое устройство, разработанное для контроля и регулирования потока рабочей жидкости в системах гидравлики. Этот клапан работает по принципу двухпозиционного управления потоком, обеспечива..

17 Июля, 2024
Bosch Rexroth - надежный партнер для вашего бизнеса в области гидравлики!

Компания Bosch Rexroth предлагает широкий спектр продукции, включая гидронасосы, гидромоторы, гидроклапана, гидроцилиндры, пневмоцилиндры, клапаны, регуляторы, датчики и многое другое. Благодаря высокому качеству продукции и многолетнему опыту работы в отрасли, Bosch Rexroth является предпочтит..

20 Июня, 2024
Как правильно выбрать насос от BOSCH REXROTH?

В мире мобильной и промышленной гидравлики, где надежность и качество стоят на первом месте, насосы Bosch Rexroth выделяются как эталон долговечности и технического совершенства. Эти изделия, зарекомендовавшие себя в России и за её пределами, стали символом немецкого качества и профессионального под..

30 Мая, 2024
Bosch Rexroth – гидравлические шестерённые насосы серии AZPF

Гидравлические шестерённые насосы серии AZPF - это оборудование, которое обеспечивает преобразование механической энергии в гидравлическую с высоким КПД. Они обладают длительным сроком службы благодаря уплотнению зазоров и высокоточной технологии производства. Приводные валы в соответствии с межд..

8 Апреля, 2024
Bosch Rexroth на выставке LogiMAT

На выставке LogiMAT компания Bosch Rexroth представила передовые компоненты, подсистемы и системные решения для автоматизации и оптимизации логистики. Среди предложений компании - практические решения для трансмиссии и рабочих функций промышленных грузовиков и автономных мобильных роботов (AMR), вкл..

22 Марта, 2024
Bosch Rexroth открывает новые возможности в управлении машинами и подключении к IoT

Bosch Rexroth предлагает одну из самых производительных систем ЧПУ на рынке. Компания является лидером в области автоматизации и устанавливают стандарты в этой области. От датчиков и сервоприводов до революционной новой платформы, Bosch Rexroth предлагает широкий спектр решений для автоматизации. ..

16 Февраля, 2024

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