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Actuators
Five series of air-powered actuators: scotch yoke for quarter-turn valves from 10 to 120,867 Nm, and linear actuators for push / pull duty. Double acting or spring return for a fail-safe position.
Scotch yoke and linear
Highest output torque (HD scotch yoke)
Direct mounting on quarter-turn series
Every series on this page is Susin
Actuator finder
Pick what the actuator has to do and the torque your valve needs. We’ll point you to the series that fit.
Series
Pick a series to see every size and model, with the full torque table and a quote.
Torque ranges
Each bar shows the output torque of a quarter-turn series, 10 to 120,867 Nm on a log scale. Ratings vary by size and air pressure, so check each series’ table.
Also in our group
Valvenok is also a distributor for KOSAPLUS UK and SPAC Pneumatic. Their full ranges, with model lists, prices and quotes, are on their own websites.
Complete the package
Add a limit switch box to report the valve position, or choose another type where air isn’t the right fit.
FAQ
Rack & pinion actuators give an even torque through the stroke and suit smaller valves. Scotch yoke actuators give their highest torque at the ends of the stroke, where most valves need it, and suit larger valves.
Double acting actuators use air to open and to close, and stay put if the air fails. Spring return actuators use air one way and a spring the other, so the valve goes to a safe position (fail-close or fail-open) when air is lost.
It depends on the series: PDS runs on 3.5–8 bar, HD on 3.5–10 bar and PLDS on 3–7 bar. Size the actuator on the lowest pressure your supply will deliver.
Yes. Our actuators accept NAMUR solenoid valves, limit switch boxes and positioners. Tell us the control signal and we’ll quote the full package.
Send us the valve, its torque, your air pressure and the fail-safe position, and we’ll size the actuator and quote it with its accessories.
