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BOSCH REXROTH
Z2S16A1-5X/
R900328798
Check Valves

Check valves: Z2S 16.-5x/

$1,213.00

BOSCH REXROTH

MATERIAL:  R900328798

SUMMARY:  Check valves: Z2S 16.-5x/

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The isolator valve type Z2S is a releasable check valve in sandwich plate design.

It is used for the leakage-free blocking of one or two actuator ports, also in case of longer standstill times.

In direction A① to A② or B① to B②, there is a free flow; in the opposite direction, the flow is blocked.

If, for example, there is a flow through the valve in direction A① to A②, the control spool (1) is moved in the direction of the B side, opens the ball seat valve (2) and then pushes the poppet (3) off its seat. Hydraulic fluid can now flow from B➁ to B➀.

In order to allow the ball seat valve (2) to be safely closed, the control spool (1) must be hydraulically unloaded (see circuit example).

 

Pre-opening

Due to the pre-opening, there is a damped decompression of the pressurized liquid. Thus, possible switching shocks are avoided. The two-stage set-up with an increased control open ratio means even low pilot pressure can be unloaded securely.

Type Z2S 16 ‒…

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Type Z2S 16 A…

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Type Z2S 16 A…SO40

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Type Z2S 16 A…SO60

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Circuit example, schematic

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

1

Control spool, area A2

2

Ball, area A3

3

Poppet, area A1

4

Stop

5

Control spool, area A4

component side

plate side

01

02

03

04

05

06

07

08

09

Z2S

16

5X

/

*

01

Check valve, Sandwich plate design

Z2S

02

Size 16

16

Leakage-free blocking

03

In channel A and B

In channel A

A

In channel B

B

Cracking pressure

04

3 bar

1

5 bar

2

7,5 bar

3

10 bar

4

05

Component series 50 ... 59 (50 ... 59: unchanged technical data and pin assignment)

5X

Seal material

06

NBR seals

no code

FKM seals

V

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

Corrosion resistance (outside; thick film passivated according to DIN 50979 Fe//Zn8//Cn//T0)

07

None (valve housing primed)

no code

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

J3

Special version

08

Standard

no code

Control open by external port G1/4 (only version "A" and "B")

SO40

Control spool unloaded to port T

SO60

09

Further details in the plain text

*

For applications outside these parameters, please consult us!

general

Size

16

Weight

kg

6.5

Installation position

any

Ambient temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80

MTTFD values according to EN ISO 13849

Years

150 1)
1) For further details, see data sheet 08012

hydraulic

Size

16

Maximum operating pressure

bar

315

Cracking pressure (in free direction)

See characteristic curves

Maximum flow

l/min

300

Direction of flow

see symbols

Hydraulic fluid

see table "Hydraulic fluid"

Hydraulic fluid temperature range (at the valve working ports)

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80

Viscosity range

mm²/s

2.8 … 500

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

Class 20/18/15

Area ratio

With pre-opening

A3/A2 ~ 1/12 (see sectional drawing)

Version "SO60"

A1/A4 ~ 1/7 (see sectional drawing)
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.

Hydraulic fluid

Classification

Suitable sealing materials

Standards

Data sheet

Mineral oils

HL, HLP, HLPD, HVLP, HVLPD

NBR, FKM

DIN 51524

90220

Bio-degradable

Insoluble in water

HETG 1)

NBR, FKM

ISO 15380

90221

HEES 1)

FKM

Soluble in water

HEPG 1)

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) 1)

NBR

ISO 12922

90223

Important information on hydraulic fluids:

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 – containing water: 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" (contains zinc)

Notice:

Selection of optimal sealing material (see "Type code") also depends on the type of hydraulic fluid used.

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

Δp-qV characteristic curves

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/ technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

component side

plate side

Version "A"

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Version "-"

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Version "B"

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Version "A…SO40"

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Version "A…SO60"

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Dimensions in mm

technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/
technical illustration-Z2S16A1-5X/-Check valves: Z2S 16.-5x/

Required surface quality of the valve contact surface

Version

Cracking pressure in bar

Leakage-free blocking in channel

L1 in mm

L2 in mm

"no code"

3; 5

„–“

10

10

7,5; 10

„–“

36,5

36,5

3; 5

A

10

8,5

3; 5

B

8,5

10

7,5; 10

A

36,5

8,5

B

8,5

36,5

„SO40“

3; 5

A, B

10

10

7,5; 10

A

36,5

10

B

10

36,5

„SO60“

3; 5

A

10

8,5

3; 5

B

8,5

10

7,5; 10

A

36,5

8,5

B

8,5

36,5

component side

plate side

1

Name plate

2

Through holes for valve mounting

3

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

4

Identical seal rings for ports X, Y, L

5

Locking pins

6

Locating holes

7

Porting pattern according to ISO 4401-07-0-05

8

Plug screw SW41, Tightening torque MA = 70 Nm

Valve mounting screws (separate order)

Size

Quantity

Hexagon socket head cap screws

Material number

16

4

ISO 4762 - M10 10.9

-

2

ISO 4762 - M6 10.9

-

Notice:

Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve.