ϑoil ϑ meter-in pressure compensator, direct operated

1/12

Information on available spare parts: www.boschrexroth.com/spc

Sizes 10 to 32Component series 2XMaximum operating pressure 350 barMaximum flow 520 l/min

Meter-in pressure compensator, direct operated

Type ZDC

RE 29224/11.07Replaces: 02.03

Table of contents Features

– Sandwich plate valve– Porting pattern to ISO 4401– Load compensation in channel P → A or P → B by integrated

shuttle valve– 2-way design “P“– 3-way design “PT“ (sizes 10 to 25)– Flow control in interaction with proportional directional valve

Content PageFeatures 1Ordering code 2Symbols 2, 3Function, section 3Technical data 4Characteristic curves 5, 6Unit dimensions 7 to 10Pilot oil supply 11, 12

tb0217

InhaltTable of contents 1Features 1Ordering code 2Symbols: 2-way design “P“ (① = component side, ② = plate side) 2Symbols: 3-way design “PT“ (① = component side, ② = plate side) 3Function, section 3Technical data (for applications outside these parameters, please consult us!) 4Characteristic curves (measured with HLP46 and ϑoil = 40 °C ±5 °C) 5Characteristic curves (measured with HLP46 and ϑoil = 40 °C ±5 °C) 6Unit dimensions: Size 10 (dimensions in mm) 7Unit dimensions: Size 16 (dimensions in mm) 8Unit dimensions: Size 25 (dimensions in mm) 9Unit dimensions: Size 32 (dimensions in mm) 10Pilot oil supply 11Pilot oil supply 12

2/12 Bosch Rexroth AG Hydraulics ZDC RE 29224/11.07

Ordering code

Further details in clear textSeal material

M = NBR seals V = FKM seals

(other seals on request) Attention!

Observe compatibility of seals with hydraulic fluid used!

No code = Without special type of protection J = Seawater-resistant

Size 10 = 10 Size 16 = 16 Size 25 = 25 Size 32 (variant “P“ only) = 32

2-way design (pressure reducing function) = P 3-way design (pressure relief function) = PTComponent series 20 to 29 = 2X (20 to 29: unchanged installation and connection dimen-sions)Pilot oil supply “internal” = No code Pilot oil supply “external = X Pilot oil supply external, port X on component side = XL plugged (size 10 only)

Symbols: 2-way design “P“ (① = component side, ② = plate side)

ZDC 2X *

Pilot oil supply “internal“Type ZDC . P-2X/…

TP A B

1

2X Y

Pilot oil supply “external“Type ZDC . P-2X/X…

TP A B

1

2X Y

Pilot oil supply “external“, port X on component side plugged (size 10 only)Type ZDC 10 P-2X/XL…

P A B

1

2X Y T

Standard types and components can be found in the EPS (standard price list).

AA

5 1243

X T A P B Y 1

2X T A P B Y

A

B6

Hydraulics Bosch Rexroth AGRE 29224/11.07 ZDC 3/12

Valves of type ZDC are direct operated meter-in pressure compensators of 2- or 3-way design.They are used for load compensation as meter-in pressure compensator in channel P.These valves basically consist of housing (1), control spool (2), compression spring (3) with spring plate (4), and cover (5) with integrated shuttle valve (6).

Function, section

Section A–A

Symbols: 3-way design “PT“ (① = component side, ② = plate side)

Pilot oil supply “internal“Type ZDC . PT-2X/…

P A B

1

2X Y T

Pilot oil supply “external“Type ZDC . PT-2X/X…

TP A B

1

2X Y

Pilot oil supply “external“, port X on component side plugged (size 10 only)Type ZDC 10 PT-2X/XL…

TP A B

1

2X Y

Compression spring (3) holds control spool (2) in the open position from P2 to P1, when pressure differential P1 → A1 or P1 → B1 is less than 10 bar.When the pressure differential exceeds 10 bar, control spool (2) is pushed to the left until the pressure differential is re-stored.


Technical data (for applications outside these parameters, please consult us!)

GeneralSize Size 10 16 25 32Weight kg 3.0 3.5 8.9 64.7Installation position Optional

1) Suitable for NBR and FKM seals2) Suitable only for FKM seals3) The cleanliness classes specified for components must be

adhered to in hydraulic systems. Effective filtration prevents malfunction and, at the same time, prolongs the service life of components.

For the selection of filters, see data sheets RE 50070, RE 50076, RE 50081, RE 50086, RE 50087 and RE 50088.

HydraulicMaximum operating pres-sure

– Ports A, B, P bar 350– Port T bar 250– Port X bar 30 to 100– Port Y bar 150; up to 30 bar in conjunction with pilot operated propor-

tional directional valveMaximum flow l/min 85 150 325 520Hydraulic fluid Mineral oil (HL, HLP) to DIN 51524 1); fast bio-degradable

hydraulic fluids to VDMA 24568 (see also RE 90221); HETG (rape seed oil) 1); HEPG (polyglycols) 2); HEES (synthetic esters) 2); other hydraulic fluids on request

Hydraulic fluid temperature range °C –20 to +70Viscosity range mm2/s 15 to 380Permissible max. degree of contamination of the hydraulic fluid - cleanliness class to ISO 4406 (c)

Class 20/18/15 3)

80

70

60

50

40

30

20

10

0 20 40 60 80 100

1

5

2

3

6

450

40

30

20

10

0 20 40 60 80

50

40

30

20

10

0 25 50 75 100 175125 150

175

150

125

100

75

50

25

0 20 40 60 80 100

2

1


Characteristic curves (measured with HLP46 and ϑoil = 40 °C ±5 °C)Flow control P to A, P to B

Pres

sure

diff

eren

tial in

bar

→

Flow in l/min →

1 With type 4WRZ 10…85…2 With type 4WRZ 10…50…3 With type 4WRZ 10…25…4 With type 4WRZ 10…64…

Flow

in l/

min

→Fl

ow in

l/m

in →

Command value in % →

Flow in l/min →Command value in % →

Flow control range

Throttling range

Flow control range

Throttling range

Size 10 Size 10

Size 16 Size 16

5 With type 4WRZ 10…32…6 With type 4WRZ 10…16…

Pressure differential ∆pmin = ppump – pload1 With type 4 WRZ 16…100…2 With type 4 WRZ 16…150…

Pres

sure

diff

eren

tial in

bar

→

Pressure differential ∆pmin = ppump – pload

350

300

250

200

150

100

50

0 20 40 60 80 100

2

1

50

40

30

20

10

0 50 100 150 200 350250 300

700

600

500

400

300

200

100

0 20 40 60 80 100

2

1

50

40

30

20

10

0 100 200 300 400 700500 600


Characteristic curves (measured with HLP46 and ϑoil = 40 °C ±5 °C)Flow control P to A, P to B

Size 25 Size 25

1 With type 4 WRZ 25…270…2 With type 4 WRZ 25…325…

Flow in l/min →

Flow

in l/

min

→Fl

ow in

l/m

in →

Command value in % →

Flow in l/min →Command value in % →

Flow control range

Throttling range

Flow control range

Throttling range

Pres

sure

diff

eren

tial in

bar

→

Size 32 Size 32

1 With type 4 WRZ 32…360…2 With type 4 WRZ 32…520…

Pres

sure

diff

eren

tial in

bar

→



0,01/100

Rzmax 4

148

25,5

3,5

70

11,8

X

TA

A

P

BY

25

6

71

4 x 6,6

70

F1 F2

F3F4

4 15

2,5


Unit dimensions: Size 10 (dimensions in mm)

1 Nameplate4 Idential seal rings for ports A, B, P, T;

Idential seal rings for ports X, Y (plate side)5 Porting pattern ISO 4401-05-05-0-056 Valve mounting screws (see on the right)

Required surface quality of valve mounting face

Valve mounting screws (separate order)4 hexagon socket head cap screws ISO 4762 - M6 - 10.9

Note! The length and tightening torque of the valve mounting screws must be calculated in conjunction with the compo-nents mounted below and above the sandwich plate valve.

0,01/100

Rzmax 4

603

3 2

4 x 11 2 x 6,6 1

352

T PX

A B Y

10,5

F1 F2

F3F4

G1

G2 F6

F5

66 3

25

166

1 4

91

5

2,5




1 Nameplate2 Locating pin3 Bore for locating pins4 Idential seal rings for ports A, B, P, T;


Valve mounting screws (separate order)4 hexagon socket head cap screws ISO 4762 - M10 - 10.9 2 hexagon socket head cap screws ISO 4762 - M6 - 10.9


0,01/100

Rzmax 4

834

44

6214

T P

Y

X A B

117

12,5

60

6 x 146

210

3

3

F1 F2

F3F4

G1

G2 F6

F5

5 2,5








0,01/100

Rzmax 4

36 2

95

75

200

TPY

B AX

6 x 22

20,5

24,5

260

370

440

70

4

100

165

4

16

125

F3 F4

F1F2

G2

3

F6

G1 F5

5

2,5








TP A B

1

2X Y

a ba 0 b

TP A BX Y

P A B

1

2X Y

a ba 0 b

P A BX Y

T

T

X T A P B Y 1

2X T A P B Y

X P 2

X P 2

B B

A B Y

T P X

P

X

P

X


Pilot oil supply

Attention! In conjunction with the meter-in pressure compensator the pilot operated proportional valve must be used in the variant with “external pilot oil supply“!

Type 4WRZ…

Type ZDC..P-2X/X…Type ZDC..P-2X/…

Size 10

External

Internal

With external pilot oil supply the connection to channel P is closed. The pilot oil is taken from a separate control circuit. With internal pilot oil supply the connection to channel P is open. The pilot oil is taken from the throttle side of the pres-sure compensator (port X in the subplate is closed).

Type 4WRZ…

Size 16

External

Internal

Section B–B

C

C

AX

T P Y

B

P X

P X

D

D

TP

AB

X

XP

XP

Bosch Rexroth AG HydraulicsZum Eisengießer 197816 Lohr am Main, Germany Phone +49 (0) 93 52 / 18-0 Fax +49 (0) 93 52 / 18-23 [email protected] www.boschrexroth.de

© This document, as well as the data, specifications and other informa-tion set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent.The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The information given does notrelease the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.


Pilot oil supply

Size 25

External

Internal

Size 32

External

Internal

Section D–D

Section C–C

ϑoil ϑ meter-in pressure compensator, direct operated

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