Festo DFPI-NB3 linear actuator

Water, dust, dirt particles and aggressive media often represent considerable challenges for linear actuators in process automation. Designed in accordance with ISO 15552 and equipped with an integrated displacement encoder and an optimised piston rod guide, the Festo DFPI-NB3 linear actuator delivers high performance over long periods in harsh environments. 

The actuator is suitable for swivel motions to control ventilation, flue gas and furnace pressure control valves, hot gas valves and drum slide valves, and for regulating flow rates and filling levels. It is equally suitable for adjusting the pitch of turbine and rotor blades. In the area of linear actuated process valves, the product can also be used to optimise the motion of shut-off and dosing valves, sluice gates and pinch and dart valves.

The actuators used in most process automation applications require external attachments in order to implement closed-loop control. Externally mounted displacement encoders require frequent re-adjustment. In addition, the moving components are prone to increased wear due to corrosion and dirt particles. With its integrated displacement encoder, the DFPI-NB3 linear actuator avoids these drawbacks. 

The device includes an optimised piston rod guide, which counteracts the effect of transverse forces on the piston rod and thus makes the product suitable for swivel motions. Due to the standard mounting interfaces, users can draw on a comprehensive range of accessories for every installation situation.