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Electric actuator

Stafsjö’s standard electric actuator comes from AUMA type SA or SAR for modulating duty. Other brands such as Rotork can also be supplied on request. 

As standard Stafsjö supply the valve with a rising stem, i.e. attachment A for rising stem. Non-rising stem with attachment B3 can also be supplied on request. The AUMA actuators are available with 3-ph AC or 1-ph AC motors. 

The multi-turn actuator type SA is used for open-close operations within temperaturs –40 °C to +80 °C. The actuator has enclosure protection IP 68 and it fulfills corrosion protection class KS. It has a wide torque range, is easy to commission and has low service requirements.

The AUMA actuator can also be supplied with various local integral controls, i.e. AUMA MATIC. The AUMA MATIC AM is the most cost-effective solution for those applications with conventional control of the valves in open-close duty. Further requirements such as position control, logging of operating data or a fieldbus interface such as Profibus can be met with the AUMATIC AC.

Recommended motor sizes is presented in each knife gate valve data sheet. For advice and further information on the AUMA actuators or on ATEX-classified ones, please contact Stafsjö, your local representative or visit www.auma.com.

Basic equipment for AUMA multi-turn type SA 
Torque switch for opening/closing
Overload protection against torque peaks
Limit switch for opened/closed position
Thermo switches
Built in heater
Hand wheel for manual operation

 

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