Powerful performer! DFPD-HD is the latest addition to the quarter turn actuator range Highlights DFPD. With torque up to 32,000 Nm, the Scotch yoke actuator is ideal for on/off and closed-loop control of ball valves, air dampers • Highly modular for a variety and butterfly valves in power plants, the chemical industry and in of applications water treatment applications. It is the perfect choice whenever safe, • SIL3-certified reliable solutions are required. • Long product service life • Interfaces to VDI/VDE 3845 NAMUR and ISO 5211 Highly modular system Safety guaranteed – up to SIL3 With a multitude of possible The DFPD-HD is SIL3-certified. combinations, DFPD-HD provides The mechanical or hydraulic the perfect solution for every manual override provides requirement. The options include additional safety along with the three different gear unit sizes, fail-close or fail-open functions. single-acting or double-acting versions, configurable spring A tough performer forces, a choice between right The strong bronze bushings and or left direction of rotation and the coating of the DFPD-HD mechanical or hydraulic manual ensure a long service life, even in override. harsh, corrosive environments.
Adaptable spring forces
For the single-acting version, the optimum torque can be defined for both opening and closing.
www.festo.com Quarter turn actuator DFPD-HD
Main functions
The DFPD-HD is suitable for The main applications of the • Treatment of drinking controlling and regulating ball DFPD-HD are: water, industrial water and valves, air dampers and butterfly • Controlling heating in different wastewater valves. Its VDI/VDE 3845-compli- power station processes • Controlling flaps in chemical ant interface enables direct • Controlling gas ventilation processes mounting of sensor boxes or flaps positioners. • Controlling compressed air flaps on furnaces
The variants
Double-acting Single-acting Single-acting with mechanical Single-acting with hydraulic
manual override manual override
Technical data Design Scotch yoke Mode of operation Double-acting or single-acting Torque Up to max. 32000 Nm Size 9000, 18000, 32000 Swivel angle 90° End position adjustment range 0° -5° ...+5° 90° Connection to process valve as per standard ISO 5211 Connection for attaching solenoid valves conforms to standard VDI/VDE 3845 (NAMUR) Operating pressure 3 ... 8.5 bar Operating temperature -20 ... 80 °C Cap material Carbon steel Piston material Carbon steel Housing material Carbon steel PSI 929.16 en 2016/12 – Errors and omissions excepted
Screw material Steel alloy
Type of ignition protection for gas II 2G Type of ignition protection for dust II 2D Explosion-proof ambient temperature -20 °C ≤ Ta ≤ +60 °C Safety Integrity Level (SIL) Up to SIL3 Low Demand mode to IEC 61508 CE marking According EU Explosion Protection Directive (ATEX)
