Rastagroup control valve manufacturer | Series P
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Series P

The Rasta Group “P” actuators were originally identified within the Rasta Group range as the air cylinder actuators. These high power actuating units, for use in on/off or modulating service, have a thrust capability which is much greater than similar size diaphragm-spring actuators due to air pressure up to 150 psig (10 bar) being used. Designed for fitting on to a wide range of control valves, louvers or dampers these actuators are capable of being operated as either a single or double acting unit. A range of springs is available to provide positive air fail action, which is field reversible. Positioner are normally yoke mounted and the double acting type, which by providing air to both sides of the piston, gives a very stiff and precise unit which is resistant to load fluctuations and transients.


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•   High thrust capability.

•   Capable of using air supplies up to 150 psig (10bar).

•   Multi-size options with long stroke capability.

•   Robust parts for trouble free, low cost ownership.

•   Positive spring fail action, which is field reversible.

•   Lightweight corrosion resistance construction.

•   Rotary options available.

•   High degree of stem positioning accuracy.

•   Cylinder design has lower air consumption than comparable diaphragm actuator.

•   Highly stable providing inherent stiffness over full stroke.

•   very responsive with minimum latency on movement or positioning.

•   High resolution of stem positioning for up to 5 ins strokes as standards with longer strokes available.

•   Actuating forces adjustable to suit application.

•   Rigorously proven on-site performance.

•   Produced with Quality Systems certified to ISO 9001.



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