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BOSCH REXROTH
R900958303

  • BOSCH REXROTH
  • Material:R900958303
  • Model:SFA32G1-1X/M/01

Due to extremely high demand, please call 877-366-7226 for availability

***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 SFA32G1-1X/M/01 (R900958303) is a high-performance pilot operated check valve designed for versatility and reliability in hydraulic systems. This particular model, part of component series X, is engineered to facilitate both threaded and flange connections, adhering to ISO standards for seamless integration into a wide range of applications. It offers the flexibility of direct attachment to working cylinders, enhancing its usability across various setups. The valve comes with the option of predecompression, which can be selected based on system requirements. The inclusion of an integrated high-pressure port further expands its capability, allowing for additional system configuration options. With its robust design, the SFA32G1-1X/M/01 can withstand a maximum operating pressure of up to 350 bar and is capable of handling maximum flow rates as specified by the manufacturer. This model is distinguished by its ability to maintain stability and control in fluid power applications, ensuring that hydraulic systems operate smoothly and efficiently. Its precise engineering demonstrates Bosch Rexroth's commitment to producing components that meet stringent quality and performance standards. Whether for mobile or industrial applications, this check valve is designed to deliver optimal performance while maintaining safety and reliability within hydraulic circuits.
technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Type SFA…GT0-1X/M/01 (without pre-decompression)

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Type SFA…FT1-X/M/01 (with pre-decompression)

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

01

Prefill valves

SFA

02

Size 25

25

Size 32

32

Size 40

40

Size 50

50

Size 63

63

Size 80

80

03

Threaded connection (only NG25 and 32)

G

Flange connection (from NG40)

F

04

Without tank bore

no code

With tank bore (from NG32)

T

05

With pre-decompression (from NG32)

1

Without pre-decompression

0

06

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

1X

Seal material

07

NBR seals

M

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

Connection version

08

Threaded holes with pipe thread according to DIN 3852 part 2

01

09

Further details in the plain text

*

01

02

03

04

05

06

07

08

09

SFA

–

/

M

/

01

*

general

Nenngröße

25 32 40 50 63 80

Weight (approx.)

kg

4.5 6 7 10.5 16 23

Installation position

any

Ambient temperature range

°C

-30 … +80

hydraulic

Size

25 32 40 50 63 80

Maximum operating pressure

Port P

bar

350

Anschluss A

bar

16

Port B

bar

350

Anschluss X

bar

150

Cracking pressure 1)

bar

≈ 0.12

Maximum flow 2)

Case of application 1

l/min

125 200 300 500 800 1200

Case of application 2

l/min

90 170 250 400 650 1000

Case of application 3

l/min

60 140 220 360 560 900

Case of application 4

l/min

40 100 150 240 380 620

Case of application 5

l/min

20 70 110 170 280 450

Druckflüssigkeit

see table

Hydraulic fluid temperature range 3)

°C

-30 … +80

Viscosity range

mm²/s

10 … 800

Maximum admissible degree of contamination of the hydraulic fluid 4)

Class 20/18/15 according to ISO 4406 (c)
1) Pressure differential at the main poppet for overcoming the spring force
2) A to B
3) At the valve working ports
4) 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, HVLP

NBR, FKM 3)

DIN 51524

Bio-degradable

Insoluble in water

HETG

NBR, FKM 3)

VDMA 24568

HEES

FKM 3)

Soluble in water

HEPG

FKM 3)

VDMA 24568

Flame-resistant

Water-free

HFDU, HFDR

FKM 3)

ISO 12922

HFC

NBR

ISO 12922

Important information on hydraulic fluids!

Flame-resistant and bio-degradable:

3) Upon request

Flow ‒ case of application 1 (A to B)

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Flow ‒ case of application 2 (A to B)

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Flow ‒ case of application 3 (A to B)

Size of the filling tank at least 1.5 x cylinder content

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Flow ‒ case of application 4 (A to B)

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Flow ‒ case of application 5 (A to B)

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Information on case of application 2 to 5

For limit areas, please contact us. It is often enough, to select a pipeline which is one size larger.

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Attention!

An underdimensioned prefill valve and/or an underdimensioned line leads to gas leaks from the hydraulic fluid with corresponding consequences and often to long-term damage at the cylinder seals.

1

Cylinders

2

Prefill valve

3

This sheet is not included in the scope of delivery. With smaller tank dimensions and minimum hydraulic fluid level (a), it prevents the formation of tunnels.

4

Observe the supply cross-section ‑ differs depending on the size!

a

min. 300 mm with extended cylinder

b

max. 1000 mm with the specified maximum flows

c

≥ 500 mm

h

~ 300 mm to max. 500 mm

For applications outside these parameters, please consult us!

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

Size 25 … 50

Pressure differential Δp between ports A and B dependent on the flow qV in suction direction A to B.

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Size 63 and 80

Pressure differential Δp between ports A and B dependent on the flow qV in suction direction A to B.

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Type SFA… (from NG25)

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Type SFA…T… (from NG32)

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Notice!

Possible circuit with directional valve and nozzle in channel P for one individual prefill valve. For the parallel connection of prefill valves, the nozzle is to be individually provided for every control line!

Threaded connection

Dimensions in mm

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

1

Name plate

6

4 valve mounting bores

Threaded connection

Dimensions in mm

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port
1) Only version "T"

1

Name plate

2

Seal ring

3

Provide bore Ø6.5 x 6 deep for the valve centering in the connection surface!

4

2 grooved dowel pins 6 x 12

5

Plug screw

6

4 valve mounting bores

Flange connection

Dimensions in mm

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port
1) Only version "T"

1

Name plate

2

Seal ring

3

Provide bore Ø6.5 x 6 deep for the valve centering in the connection surface!

4

2 grooved dowel pins 6 x 12

5

Plug screw (only version "T")

6

4 valve mounting bores

7

Flange connection according to ISO 6162-1

Dimensions

NG

L1

L2

L3

L4

ØD1

ØD2

ØD3

ØD4

ØD5

D6

ØD7

D8

D9

ØD10

H1

H2

H3

H4

H5

H6

H7

H8

H9

H10

H11

H12

H13

max.

max.

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

mm

25 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
32 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
40 35.7 35.7 88.4 ± 0.2 mm 58 62 10 15.7 90 ± 0.1 17.5 58 M16 10 M12 38 40 85 69.9 ± 0.2 109 102 85 22 116 88.4 ± 0.2 10 26 92 ± 0.1 54 18
50 42.9 42.9 102.5 ± 0.2 mm 70 72 13 19 104 ± 0.1 22 71 M20 13 M12 51 50 101 77.8 ± 0.2 132 124 101 22 141 102.5 ± 0.2 12 32 108 ± 0.1 66 18
63 50.8 50.8 113.15 ± 0.2 mm 80 82 13 19 120 ± 0.1 26 90 M24 13 M12 64 63 125 88.9 ± 0.2 152 144 125 30 160 113.15 ± 0.2 14 38 130 ± 0.1 83 18
80 61.9 61.9 134 + 0.3 mm 92 95 13 19 140 ± 0.1 30 107 M27 13 M16 76 78.5 140 106.4 ± 0.2 170 158 140 30 185 134 + 0.3 16 43 150 ± 0.1 90 21

Poppet geometry and determination of the minimum pilot pressure

Dimensions in mm

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

A1

Effective area of the main poppet

A2

Effective area of the pilot poppet

A3

Effective area of the control spool

s1

Stroke of the main poppet

s2

Stroke of the control spool

F1

Spring force of the valve spring

F2

Spring force of the compression spring of the control spool

Vst x

Pilot volume for opening the valve

pÖ

Cracking pressure (pressure differential at the main poppet for overcoming the spring force F1)

pSt

Pilot pressure at port X

pB

System pressure at port B

technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Example: Type SFA32...G0

pB = 30 bar [435 psi];

pSt = 4.0 x 30 bar [435 psi] = 120 bar [1750 psi]

NG

A1

A2

A3

s1

s2

F1

F2

VstX

Unchecking ratio

cm²

cm²

cm²

mm

mm

N

N

cm³

Without pre-decompression 2)

With pre-decompression

25 5.31 - 1.33 6.2 5 6 … 14 38 … 70 0.66 4 -
32 8.04 0.5 1) 2.01 8.5 6.5 9 … 22 58 … 109 1.3 4 0.3 3)
40 13.52 0.78 1) 3.14 10 7 14 … 29 93 … 162 2.2 4.3 0.3 3)
50 21.24 1.13 1) 4.71 12.5 9 23 … 49 149 … 261 4.2 4.5 0.3 3)
63 32.67 1.17 1) 7.07 14.5 11 35 … 63 206 … 348 7.8 4.6 0.3 3)
80 49.02 2.54 1) 10.18 17 13 57 … 127 310 … 579 13.2 4.8 0.3 3)
1) Is omitted for version "without pre-decompression" (SFA...0...)
2) Without pre-decompression
3) With pre-decompression
technical illustration-R900958303-Pilot operated check valve For threaded connection (NG25 and 32) For flange connection according to ISO 6162-1 (from NG40) For direct attachment to the working cylinder With or without pre-decompression, optional Integrated high-pressure port

Nozzle insert

Size

25 32 40 50 63 80

Nozzle Ø in mm

mm

0.8 1