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Festo
8211834
Quarter turn actuator DFPD-3500-RP-90-RD-F16
The Festo industrial component, part number 8211834, is a double-acting gear rack and pinion valve actuator featuring a size 3500 designation and an F16 flange hole pattern. It provides a 90-degree swivel angle with an end-position adjusting range of -5 degrees to 5 degrees at both 0 degrees and the nominal swivel angle, alongside an ISO 5211 standard valve connection and a 50 mm shaft connection depth. Operating within a pressure range of 2 bar to 6.8 bar and a nominal operating pressure of 5.5 bar, this unit achieves a burst pressure of 20.43 bar and includes ATEX CE marking as per the EU explosion protection directive. Furthermore, the actuator supports functional safety up to SIL 2 in low demand mode and SIL 3 in a redundant architecture, certified to ISO 13849 and IEC 61508 standards with VDI/VDE 3845 NAMUR and VDI/VDE 3845 Size AA 3 compliance. Submit the exact part number, quantity, and application requirements to request a quote.
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- Manufacturer
- Festo
- Part number
- 8211834
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 8211834.
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Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Size of valve actuator
- 3500
- Flange hole pattern
- F16
- Swivel angle
- 90 deg
- End-position adjusting range at 0°
- -5 deg...5 deg
- End-position adjusting range at nominal swivel angle
- -5 deg...5 deg
- Depth shaft connection
- 50 mm
- Standard connection for valve
- ISO 5211
- Mounting position
- Any
- Mode of operation
- Double-acting
- Structural design
- Gear rack/pinion
- Closing direction
- Closes to the right
- Valve connection conforms to standard
- VDI/VDE 3845 (NAMUR)
- Connection point for positioner and position sensor conforms to
- VDI/VDE 3845 Size AA 3
- Safety function
- The safety function consists of the actuator switching to the dened | safety switching position. This switching movement is achieved by | pressurizing the corresponding pressure chamber with compressed air. | The value of the torque generated depends on the pressure difference | between the two pressure chambers separated by the piston.
- Safety integrity level (SIL)
- Up to SIL 2 low demand mode | up to SIL 3 in a redundant architecture
- Certied for safety function to ISO 13849 and IEC 61508 (SIL)
- Product can be used in safety-related parts of control systems up to SIL | 2, low demand | up to SIL 3 in a redundant architecture
- Burst pressure
- 20.43 bar
- Operating pressure
- 0.2 MPa...0.68 MPa | 2 bar...6.8 bar | 29 psi...98.6 psi
- Nominal operating pressure
- 0.55 MPa | 5.5 bar | 79.75 psi
- CE marking (see declaration of conformity)
- as per EU explosion protection directive (ATEX)
- UKCA marking (see declaration of conformity)
- acc. to UK EX instructions
- Explosion protection certication outside the EU
- EPL Db (GB) | EPL Gb (GB)
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 8211834. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.