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Festo
557550
Semi-rotary actuator DFPB-20-090-S4-F05
The Festo 557550 is a single-acting rack and pinion industrial component featuring a size 20 actuator, an F05 flange hole pattern, a 90-degree swivel angle, and a NAMUR-standard valve connection based on VDI/VDE 3845 without position detection or cushioning. Operating at pressures up to 8 bar with a nominal working pressure of 5.6 bar, this unit supports compressed air per ISO 8573-1:2010 [7:4:4] in any assembly position and permits lubricated operation. Certified for hazardous locations with ATEX categories II 2G and II 2D, it maintains an explosion-proof and standard ambient temperature range of -20°C to +80°C while supporting Safety Integrity Levels up to SIL 3 in Low Demand mode. Submit the exact part number, quantity, and application requirements to receive a formal quotation.
Request pricing and availabilityCommercial response for your destination and required quantity.
Request a Quote- Manufacturer
- Festo
- Part number
- 557550
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 557550.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Size of actuator
- 20
- Flange hole pattern
- F05
- Swivel angle
- 90 deg
- Cushioning
- No cushioning
- Assembly position
- Any
- Mode of operation
- single-acting
- Design structure
- Rack and pinion
- Position detection
- No
- Valve connection conforms to standard
- Based on VDI/VDE 3845 (NAMUR)
- Safety Integrity Level (SIL)
- bis SIL 3 Low Demand mode
- Working pressure
- <= 8 bar
- Nominal working pressure
- 5.6 bar
- ATEX category Gas
- II 2G
- Explosion ignition protection type Gas
- c T4 X
- ATEX category Dust
- II 2D
- Explosion ignition protection type Dust
- c 125°C X
- Explosion-proof ambient temperature
- -20°C <= Ta <= +80°C
- Ambient temperature
- -20 ... 80 °C
- Operating medium
- Compressed air in accordance with ISO8573-1:2010 [7:4:4]
- Note on operating and pilot medium
- Lubricated operation possible (subsequently required for further | operation)
- CE symbol (see declaration of conformity)
- according to EU-Ex protection guideline (ATEX)
- Corrosion resistance classification CRC
- 3
- Note about the torque
- Das Betriebsdrehmoment des Antriebs darf nicht höher sein als das in | der ISO 5211 aufgeführte maximal zulässige Drehmoment, bezogen auf | die Größe des Befestigungsflansches und der Kupplung.
- PFD (Probability of Failure on Demand)
- 4.95E-06
- Pneumatic connection
- Subbase | G1/8
- Materials note
- Conforms to RoHS
- Materials information for drive shaft
- Wrought Aluminum alloy | Anodized
- Materials information for cover
- Aluminum die cast | coated
- Materials information for seals
- NBR
- Materials information, housing
- Wrought Aluminum alloy | Anodized
- Materials information for nut
- Wrought Aluminum alloy | Anodized
- Screw material data
- High alloy steel, non-corrosive
Engineering context
Identification and RFQ Guidance
What to include in your RFQ
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Technical verification
Our sourcing response is prepared against Festo 557550. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.