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| | Feature | Benefit | |
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| | Output torque and speed are independent of the supply voltage / frequency (within a wide tolerance) | - Actuator torque and positioning speed are unaffected by voltage variations of ±15 % of the specified voltage range (transitional voltage tolerance ±20 %) and frequency variations from 40 Hz to 70 Hz.
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| | Low starting current – always below nominal rated current | - Allows lower cable rating / longer cable lengths.
- More actuators can be connected to a given cable size.
- UPS systems can be specified with a lower power rating.
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| | Enhanced valve protection | - The actuator reduces speed before reaching the end position.
Valves are moved gently in or out of the end positions at full torque. - Torque tripping without over-torque
The actuator is shut off at the stall torque of the motor.
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| | Easy positioning speed changes | - Process optimisation can occur post installation.
- Allows simplification at the planning stage.
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| | Water hammer / cavitation avoidance | - The travel of the actuator can be divided into ranges: an optimal positioning speed can then be selected for each of these ranges to avoid water hammer and cavitation.
- In addition, it is also possible to linearise the valve flow characteristics using this variable speed capability.
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| | Precise control with high repeatability | - Accurate and repeatable valve positioning is achieved through speed reduction when approaching the setpoint.
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| | Multiple software configured options | - Many software options are available which can easily be subsequently configured, for example process controller, travel-positioning time curve etc.
- Customer specific functions can be implemented at short notice.
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| | DCS / PLC interface is fully flexible | - Binary and analog signaling are always available, even when utilizing the fieldbus interface.
- The fieldbus interface is easily retrofitted.
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| | Single or three-phase power supply | - Use of a frequency converter in combination with a robust three-phase asynchronous motor allows connection to single or three phase power supplies.
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| | Full motor protection | - Measuring and monitoring of both motor current and temperature provides full motor protection.
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| | Reduced spares inventory for the complete actuator range | - Converter technology and actuator software allows the number of mechanical and electrical components to be reduced to a minimum.
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