You are using an outdated browser. For a faster, safer browsing experience, upgrade for free today.
Bosch Rexroth-R900457256-R900457256

BOSCH REXROTH
R900457256


$1,011.81 USD
  • BOSCH REXROTH
  • Material:R900457256
  • Model:Z2FS16-8-3X/S2

Quantity in stock: 0

Note: Sales tax, and shipping will be calculated at checkout.
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth Z2FS16-8-3X/S2 (R900457256) is a high-performance industrial hydraulic valve designed for efficient flow regulation within hydraulic systems. This throttle check valve, with its sandwich plate design, is engineered to limit the flow to one or two actuator ports, ensuring precise control over the movement of hydraulic actuators. The valve features two symmetrically arranged throttle check valves that utilize adjustable throttle spools to restrict flow in one direction while permitting free return flow in the opposite direction. This particular model is equipped with a spindle that has an internal hexagon for direct actuation, allowing for accurate and easy adjustment of the throttling point. The spool symbol configurations available are A A, B B or A A, B B, mechanically actuated to suit various application requirements. With a maximum pressure capacity and multiple ports, this valve can handle demanding operational conditions. The Z2FS16-8-3X/S2 is designed for sandwich plate mounting and adheres to NFPA T.. R D and ISO standards for porting patterns. It offers flexibility in terms of connection options and can be used for either meter-in or meter-out throttling applications. The size of the valve corresponds to CETOP D specifications, ensuring compatibility with standard subplates. Constructed with NBR seals, it is compatible with a range of hydraulic fluids including HL, HLP, HLPD, HVLP, HVLPD, and HFC types. The robust design guarantees reliable performance in controlling actuator speed by being installed between the directional valve and the subplate. Its maximum operating pressure reaches up to bar while it can accommodate a maximum flow rate of l/min. The product's weight adds to its stable installation without compromising ease of maintenance. In summary, the Bosch Rexroth Z2FS16-8-3X/S2 offers exceptional control over fluid dynamics within industrial hydraulics systems through precise throttling capabilities and reliable construction suited for various mechanical applications.


Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Industrial hydraulic valve in a high performance range. Reliable throttling of the flow to setting value.

Unpacked Weight: 4.46 kg

The valve type Z2FS is a throttle check valve in sandwich plate design. It is used for the flow limitation of one or two actuator ports.

 

Two symmetrically arranged throttle check valves limit flows (by adjustable throttle spools) 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) to actuator A➁. The throttle spool (2.1) can be axially adjusted via the spindle (3) for adjustment of the throttling point (1).

Simultaneously, the hydraulic fluid in channel A➀ is directed via the bore (4) to the piston side (5).

The active pressure and the spring force retain the throttle spool (2.1) in throttle position.

The hydraulic fluid return flow from actuator B➁ displaces the throttle spool (2.2) and enables the unobstructed flow as check valve. Depending on the version ("S" or "S2"), the throttling effect may occur in supply or discharge.

 

Flow limitation

For actuator velocity adjustment, the throttle check valve is installed between the directional valve and the subplate.

Supply throttling

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

➀

component side

➁

plate side

Direct actuated
Internal hexagon
Maximum operating pressure 350 bar
Component series 3X
Size 16
Maximum flow 250 l/min
Data Sheet Download Data Sheet
3D CAD Download 3D CAD
Manual Download Manual
Manual Download Manual
Manual Download Manual
Manual Download Manual
Manual Download Manual
Spool symbolA1 → A2, B1 → B2 or A2 → A1, B2 → B1
Max. pressure350
Productgroup ID9,10,11,12,13,14
Number of ports4
Type of actuationwith mechanical actuation
Size16
Max. flow250
Type of connectionSandwich plate
Connection diagram NFPANFPA T3.5.1 R2-2002 D07
Size_CETOPD07
Connection diagramISO 4401-07-07-0-05
Number of switching positions2
Weight4.46
SealsNBR
Hydraulic fluidHL,HLP,HLPD,HVLP,HVLPD,HFC

01

02

03

04

05

06

07

08

09

10

11

Z

2

FS

16

8

–

3X

/

*

01

Sandwich plate valve

Z

Number of functions

02

2 (throttling in channel A and/or B)

2

03

Throttle check valve

FS

04

Size 16

16

Functions in

05

Channel A

A

Channel B

B

Channel A and B

–

Adjustment type

06

Spindle with internal hexagon

8

07

Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions)

3X

Supply throttling / discharge throttling

08

Supply throttling on side A ("…A8–3X/S")

S

Supply throttling on side B ("…B8–3X/S")

Supply throttling on side A and B ("…–8–3X/S")

Discharge throttling on side A ("…A8–3X/S2")

S2

Discharge throttling on side B ("…B8–3X/S2")

Discharge throttling on side A and B ("…–8–3X/S2")

Corrosion resistance (outside)

09

None (valve housing primed) (standard)

no code

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

J3

Seal material

10

NBR seals

no code

FKM seals

V

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

11

Further details in the plain text

*

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

general

Size

16

Weight (approx.)

kg

4.7

Installation position

any

Ambient temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80

hydraulic

Size

16

Maximum operating pressure

bar

350

Maximum flow

l/min

250

Hydraulic fluid

see table

Hydraulic fluid temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80

Viscosity range

mm²/s

2.8 … 380

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

Data sheet

Mineral oils

HL, HLP

NBR, FKM

DIN 51524

90220

Bio-degradable

Insoluble in water

HEES 2)

FKM

 

ISO 15380

90221

Soluble in water

HEPG 2)

FKM

 

ISO 15380

Containing water

Containing water

HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) 2)

 

NBR

ISO 12922

upon request

Important information on hydraulic fluids:

Further information and information on the use of other hydraulic fluids on request! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! The flash point of the hydraulic fluid used must be 40 K higher than the maximum solenoid surface temperature.

Flame-resistant – containing water:

Maximum pressure differential 210 bar, otherwise increased cavitation Pressure pre-loading at the tank port >20 % of the pressure differential; otherwise, increased cavitation Life cycle compared to operation with mineral oil HL, HLP 30 to 100 %
2) Not for version "J3"

For applications outside these parameters, please consult us!

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

Δp-qV characteristic curves (via check valve with closed throttle)

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Δp-qV characteristic curves (constant throttle position)

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Supply throttling "S"

Version "-"

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Discharge throttling "S2"

Version "-"

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Discharge throttling "S2"

Version "A"

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Discharge throttling "S2"

Version "A"

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Supply throttling "S"

Version "B"

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Discharge throttling "S2"

Version "B"

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

➀

component side

➁

plate side

Supply throttling "S"

Version "A"

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Dimensions in mm

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

Dimensions in mm

technical illustration-R900457256-Size 16, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, mechanically actuated

1

Name plate

2

Adjustment type "8“

Spindle for changing the flow cross-section (internal hexagon SW6)

Left rotation = higher flow Right rotation = lower flow

3

Through holes for valve mounting

4

Identical seal rings for connection A, B, P, T

5

Identical seal rings for ports X, Y, L

6

Locking pin (included in the scope of delivery)

7

Hexagon SW19, tightening torque MA see table

8

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

9.1

Plug screw with version "B"

9.2

Plug screw with version "A"

Version “Corrosion resistance”

L1

L2

L3

L4

L5

L6

Pos. 7 MA in Nm ±10 %

mm

mm

mm

mm

mm

mm

Nm

"no code" 224 248 224 248 246 294 25
„J3“ 227 251 227 251 252 300 33

Valve mounting screws (separate order)

metric

4 hexagon socket head cap screws ISO 4762 - M10 - 10.9-flZn-240h-L

2 hexagon socket head cap screws ISO 4762 - M6 - 10.9-flZn-240h-L

 

UNC

4 hexagon socket head cap screws 3/8-16 UNC

2 hexagon socket head cap screws 1/4-20 UNC

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.