Enhanced range

AUMA is a specialist in offering an extremely wide speed control ratio, allowing operators to benefit simultaneously from both accurate positioning and rapid operation.

Variable speed can offer significant advantages in a wide variety of closed-loop and open-loop control applications, as for each change of valve position the optimum operating speed can be selected.

When working in modulating duty, the actuator speed reduces progressively as the valve position approaches the setpoint, giving a significant increase in positioning accuracy. In profile operation, with up to eight pivot points in each direction of travel, automatic speed adjustment ensures rapid travel while minimising cavitation and pressure surges. Soft start and soft stop allow smooth operation close to the end positions.

Actuator speed can also be controlled externally to take full advantage of additional control variables or algorithms. A further option is absolute speed synchronisation between two actuators.

The new actuators are available in six sizes covering torques up to 1,000 Nm. Open-close actuators operate within one of two speed ranges: 6 – 60 and 12 – 120 rpm. Most of the modulating actuators can also operate in the range 24 – 240 rpm.