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Description
- Size 200 … 300
- Component series 4X
- Maximum operating pressure 350 bar
- Maximum flow 14000 l/min
Features
- Hydraulically active switching prefill valve (check valve) for flange connection
- Reduced switching noises due to end position cushioning effective on both sides
- Optimized switching time characteristics
Product description
Control port X: "Open" control port X1: "Close"
Type code
| 01 | Prefill valves | SFS |
| 02 | Size | 200 |
| 250 | ||
| 300 | ||
| 03 | Flange connection | A |
| 04 | without pre-decompression | 0 |
| 05 | Main spool actively controllable | 1 |
| 06 | Component series 40 to 49 (40 to 49: unchanged installation and connection dimensions) | 4X |
| Seal material | ||
| 08 | NBR seals | no code |
| Observe compatibility of seals with hydraulic fluid used. | ||
| 09 | Further details in the plain text | * |
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | |||
| SFS | A | 0 | – | 1 | – | 4X | / | * |
Technical data
general
| Size | 200 | 250 | 300 | |
| Weight | kg | 190 | 380 | 655 |
| Installation position | any | |||
| NG | Maximum switching time in ms 1) | |
| Close | Open | |
| ms | ms | |
| 200 | 60 | 70 |
| 250 | 70 | 80 |
| 300 | 110 | 90 |
| 1) | At X, X1 = 150 bar. The switching time depends on the line resistance, control valve and pilot flow. |
hydraulic
| Size | 200 | 250 | 300 | ||
| Maximum operating pressure | Anschluss A | bar | 16 | ||
| Port B | bar | 350 | |||
| Anschluss X | bar | 150 | |||
| Anschluss X1 | bar | 150 | |||
| Maximum flow | Case of application 1 | l/min | 5600 | 10000 | 14000 |
| Case of application 2 | l/min | 4340 | 6775 | 9750 | |
| Case of application 3 | l/min | 3770 | 5890 | 8480 | |
| Case of application 4 | l/min | 1510 | 2360 | 3400 | |
| Druckflüssigkeit | Mineral oil (HL, HLP) to DIN 51524;fast bio-degradable hydraulic fluids according to VDMA 24568; HETG (rape seed oil); other hydraulic fluids on enquiry | ||||
| Hydraulic fluid temperature range | °C | -30 … +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. |
Flow ‒ case of application 1 (A to B)
Flow ‒ case of application 2 (A to B)
Size of the filling tank at least 1.5 x cylinder content
Flow ‒ case of application 3 (A to B)
Flow ‒ case of application 4 (A to B)
Information on case of application 1 to 4
For limit areas, please contact us. It is often enough, to select a pipeline which is one size larger.
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 |
| a | min. 300 mm with extended cylinder |
| b | up to 1000 mm with the specified maximum flows |
| c | ≤ 500 mm |
| h | 300 mm ≤ h < 500 mm |
(For applications outside these values, please consult us!)
Symbols/Circuit diagrams
Dimensions
Dimensions in mm
| 1 | Housing installation continuously rotatable by 360° |
| 2 | Flange according to EN 1092-1/11.../PN16 |
| 3 | Name plate |
| T2 | Depth of fit |
| N2 | Number of the valve mounting screws evenly arranged at the circumference (separate order) The following valve mounting screws are recommended: Hexagon socket head cap screws ISO 21269 - 10.9 friction coefficient μtotal = 0.12 to 0.17 |
Number of the valve mounting screws evenly arranged at the circumference (separate order)
The following valve mounting screws are recommended:
Hexagon socket head cap screws ISO 21269 - 10.9
friction coefficient μtotal = 0.12 to 0.17
| NG | Dimensions in mm | Tightening torqueMA in Nm |
| 200 | M36 x 3 x 150 | 3100 |
| 250 | M42 x 3 x 180 | 5100 |
| 300 | M42 x 3 x 220 | 5100 |
| NG | B1 | B2 | B3 | B4 | ØD1 | ØD2 | ØD3 | ØD4 | ØD5 | ØD6 | ØD7 | D8 | D9 | ØD10 | ØD11 | ØD12 | ØD13 | ØD14 | ØD15 | H1 | H2 | H3 | H4 | H5 | N1 | N2 | T1 | T2 | T3 | T4 | R1 |
| 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 | |||||
| 200 | 275 | 24 | 3 | 60 | 168 | 273 | 268 | 340 | 295 | 22 | 40 | G1 1/4 | 350 | 420 | 290 | 350 | M36 x 3 | 270 | 445 | 180 | 255 | 35 | 100 | 12 | 15 | 37 | 26 | 5 | 50 | 3 | |
| 250 | 330 | 26 | 3 | 80 | 225 | 356 | 320 | 405 | 355 | 26 | 46 | G1 1/2 | G1 1/4 | 445 | 530 | 380 | 445 | M42 x 3 | 355 | 571 | 240 | 320 | 55 | 120 | 12 | 18 | 57 | 42 | 8 | 60 | 5 |
| 300 | 380 | 28 | 4 | 94 | 250 | 419 | 378 | 460 | 410 | 26 | 46 | G1 1/2 | G1 1/4 | 525 | 610 | 450 | 525 | M42 x 3 | 425 | 684 | 305 | 390 | 55 | 160 | 12 | 24 | 57 | 42 | 8 | 75 | 5 |
Poppet geometry and determination of the minimum pilot pressure
| A1 | Effective area of the main poppet |
| A2 | Effective area of the control spool "closing" |
| A3 | Effective area of the control spool "opening" |
| s | Piston stroke |
| V1 | Pilot volume for opening the valve |
| V2 | Pilot volume for closing the valve |
| pSt | Pilot pressure at port X |
| pB | Operating pressure at port B |
 |
| NG | A1 | A2 | A3 | s | V1 | V2 | Unchecking ratio |
| cm² | cm² | cm² | mm | cm³ | cm³ | ||
| 200 | 216.4 | 36.4 | 50.3 | 42 | 211 | 153 | 4.3 |
| 250 | 373.3 | 67.4 | 95 | 52.5 | 503.7 | 353.8 | 3.9 |
| 300 | 572.6 | 92.86 | 143.1 | 63 | 901.8 | 585 | 4 |
Example: Type SFS 200 A0...
pB = 30 bar;
pSt = 4.3 x 30 bar = 129 bar
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