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BOSCH REXROTH
Z2FS6-2-4X/1Q
R900481621
Flow Control Throttle Valves

Flow-/throttle valves: Z2FS 6.-4x/

$394.00

BOSCH REXROTH

MATERIAL:  R900481621

SUMMARY:  Flow-/throttle valves: Z2FS 6.-4x/

Quantity in stock: 2

Quantity Details:
  • Hydrotech Stock: 0 can ship March 28, 2024
  • Factory Stock: 2 can ship May 9, 2024
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The valve type Z2FS is a twin throttle check valve in sandwich plate design. It is used for the main or pilot flow limitation of one or two actuator ports.

Two throttle check valves aligned symmetrically to each other limit flows in one direction and allow free return flow in the opposite direction.

In case of supply throttling, the hydraulic fluid is directed through channel A➀ via throttling point (1) formed by the valve seat (2) and the throttle spool (3) to actuator A➁. The throttle spool (3) can be axially adjusted via the setscrew (4) for adjustment of the throttling point (1).

The hydraulic fluid return flow from actuator A➁ displaces the valve seat (2) against the spring (5) in the direction of the throttle spool (3) and enables the unobstructed flow as check valve. Depending on the installation position, the throttling effect may occur in supply or discharge.

Main flow limitation (Version "2Q")

For actuator velocity adjustment (main flow limitation), the twin throttle check valve is installed between the directional valve and the subplate.

Pilot flow limitation (Version "1Q")

With pilot-operated directional valves, the twin throttle check valve can be applied for switching time adjustment (pilot flow limitation). In this case, it is installed between the pilot control valve and the main valve.

Type Z2FS 6 –2…

(Supply throttling)

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

component side

plate side

01

02

03

04

05

06

07

08

09

Z2FS

6

4X

/

*

01

Twin throttle check valve, sandwich plate design

Z2FS

02

Size 6

6

03

Throttle check valve side A and B

– 1)

Throttle check valve side A

A

Throttle check valve side B

B

Adjustment type

04

Setscrew with lock nut and protective cap

2

Lockable rotary knob with scale

3 2)

Spindle with internal hexagon and scale

5

Rotary knob with scale

7

05

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

4X

06

With fine adjustment

1Q

Standard version

2Q

Seal material

07

NBR seals

no code

FKM seals

V

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

08

no code

With locating hole

/60 3)

09

Further details in the plain text

*

1) Identical adjustment types on sides A and B
2) H-key with material no. R900008158 is included in the scope of delivery.
3) Locking pin ISO 8752-3x8-St, material no. R900005694 (separate order)

Preferred types and standard units are contained in the EPS (standard price list).

general

Size

6

Weight (approx.)

kg

0.8

Installation position

any

Ambient temperature range

°C

-20 … +80

hydraulic

Size

6

Maximum operating pressure

bar

315

Maximum flow

l/min

80

Hydraulic fluid

see table

Hydraulic fluid temperature range

°C

-20 … +80

Viscosity range

mm²/s

10 … 800

Maximum admissible degree of contamination of the hydraulic fluid 1)

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

Mineral oils and related hydrocarbons

HL, HLP, HLPD

NBR, FKM

DIN 51524

Environmentally compatible

Insoluble in water

HETG

NBR, FKM

 

ISO 15380

HEES

FKM

Soluble in water

HEPG

FKM

 

ISO 15380

Containing water

Water-free

HFDU, HFDR

FKM

 

ISO 12922

Containing water

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

 

NBR

ISO 12922

Important information on hydraulic fluids!

For further information and data on the use of other hydraulic fluids, please refer to data sheet 90220 or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)!

Flame-resistant – containing water:

Maximum operating pressure 210 bar Maximum hydraulic fluid temperature 60 °C Expected life cycle as compared to HLP hydraulic oil 30 % to 100 %

For applications outside these parameters, please consult us!

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

Δp-qV characteristic curves (Version "2Q")

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

Δp-qV characteristic curves (Version "1Q")

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

Δp-qV characteristic curves for Z2FS 6 ... via open check valve with closed throttle

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

Supply throttling

Type Z2FS 6 –…

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

Type Z2FS 6 B…

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

Discharge throttling

Type Z2FS 6 –…

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

Type Z2FS 6 A…

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

component side

plate side

Dimensions in mm

technical illustration-Z2FS6-2-4X/1Q-Flow-/throttle valves: Z2FS  6.-4x/

Component side – porting pattern according to ISO 4401-03-02-0-05 (with locating hole Ø3 x 5 mm deep)

plate side – porting pattern according to DIN 24340 form A (without locating hole), or ISO 4401-03-02-0-05 (with locating hole for locking pin ISO 8752-3x8-St; version "/60")

1

Name plate

2

Adjustment type "2"

3

Adjustment type "3"

4

Adjustment type "5"

5

Adjustment type "7"

6

Space required to remove the key

7

Valve mounting bores

8

Lock nut SW10

9

Setscrew/spindle for flow cross-section adjustment (internal hexagon SW5)

10

Same seal rings for ports A, B, P, T

11

Seal ring plate

12

for all adjustment types:

Left rotation = higher flow

Right rotation = lower flow

13

Modification from discharge to supply control is realized by rotation of the device around axis "X" – "X"

14

Stroke

15

Plug screw SW22

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.

Valve mounting screws (separate order)

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