Multi-Turn Actuators
In compliance with ISO 5210, a multi-turn actuator is capable of withstanding thrust applied to the valve and transmits torque to the valve for at least one revolution. In general, multi-turn actuators are required to perform more than one revolution. Consequently, gate valves are often equipped with rising valve stems. They are operated on the basis of several revolutions performed by the multi-turn actuator. Therefore, the multi-turn actuator is equipped with a hollow shaft housing the gate valve stem for these applications.
Usage:
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Slide/Sluice Gates. For example any Fontaine actuated gate
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Knife Gate and Traditional wedge and double disk gate valves
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Any valve that requires more than 90deg of travel. Often due to torque/rimpull customer requirements.
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Actuators of the SA type range for open-close duty and positioning duty are rated for class A and B or types of duty S2 – 15 min. A special version for longer running is available for the S2 – 30 min duty.
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The modulating actuators of the SAR range are rated for class C or types of duty S4 - 25 %. Special versions for S4 - 50 % and S5 - 25% are also available.
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Actuators of type range SA/SAR can be combined with various controls from simple OPEN-CLOSE control to the micro-controlled version with logging of operating data or fieldbus interface.
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With SAV .2 multi-turn actuators for open-close duty and SARV .2 for modulating duty paired with ACV .2 actuator controls, the proven AUMA SA/SAR range is enhanced by variable speed models. AUMA is spearheading market technology offering a wide speed control ratio of 1:10.
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Actuators of the SAV type range for open-close duty and positioning duty are rated for class A and B or types of duty S2 – 15 min. A special version for longer running is available for the S2 – 30 min duty.
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Actuators of the SARV type range are rated for class C or types of duty S4 – 25 %. Special versions for S4 – 50 % are also available.
Variable in Speed, Resistance against Voltage and Frequency fluctuations.
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Use of a specially developed frequency converter offers tremendous advantages. The most important features are variability in speed, resistance against voltage and frequency fluctuations, no current peaks during start-up as well as gentle operation of the valve by reducing speed in end positions. The robust design is extremely resilient against environmental influences (standard corrosivity class C5, IP67, double
sealed – protection is also ensured during commissioning) and can be further enhanced as an option. -
The SEVEN actuator is available in three electronics variants: ECOTRON, PROFITRON and HiMod.
