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Pneumatic Actuators F257

Vertical quarter turn Südmo Pneumatic Actuators F257 are used to drive butterfly, ball and shutter type valves. The pneumatic actuators are commonly used in all segments of hygienic applications. 


  • Fast and reliable quarter turn operation makes it suitable for use with butterfly, ball and plug valves
  • Only one external air supply line is required with our internally air ported actuator, when used with the Pentair control top on 100 & 140 sizes.
  • Constructed from corrosion resistant materials
  • Designed with an optimized piston helix to provide maximum torque output
  • Double acting or spring return models available
  • Fully contained spring module, to ensure complete safety to maintenance personnel
  • Maintenance friendly
  • Site repairable
  • Modular bridge clamp mounting for easy actuator change-out on 100 & 140 sizes

Functional Description

Südmo Pneumatic Actuators use an unique helix to convert liner motion of the pistion into 1/4 turn rotary action. On some sizes the helix is characterized to optimize the generated output torque.

The Südmo Pneumatic Actuators can be supplied in two configurations, Spring return (SR), or Double acting (DA) and the SR models can be configured in the valve build up to provide a mechanical fail to close or fail to open condition.


Fields of application

The pneumatic actuators are made from corrosive resistant materials and clean lines important for applications in the food, dairy, brewing, pharmaceutical, beverage and chemical industries. The Südmo Pneumatic Actuator Vertical SS in combination with the Easymind Electronic Control Top creates a simple and cost effective automation package for all 1/4 turn valve options.




Südmo Pneumatic Actuators F257
ATEX Operating and Safety Instructions - Pentair Pneumatic Actuators F257
Südmo Hygienic Components

Download PDF

Pneumatic Actuators - F257 | Pentair - brochure
Pneumatic Actuators - F257  | Pentair - Safety instructions
Components Catalog | Südmo
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