Auma announced the new MWG actuator, available with a mechanical position indicator and with considerably enhanced quality properties compared to its predecessor, thanks to the fact that, by performing a reference operation during commissioning, the position indicator automatically adjusts to the valve end position. The launch has been scheduled at the end of the year.The functional principle of sensing the travel, recording the torque applied within the valve via absolute encoder and transforming the result via Hall sensors into electronic signal remains unchanged. These signals are processed by AC integral actuator controls, and position recording is possible even without power supply and without battery buffer, in addition, the direction of the last operation is indicated. Consequently, any position change via handwheel is correctly recorded after restoring the power supply. Compared to the predecessor, the absolute encoder – the core of the control unit – comprises less components while providing identical resolution.
Automatic self-adjusting display means that, if the customer has specified the precise stroke range at the time of order, the device housing does not have to be opened for commissioning. Anyway, any further modification can still be done at a later time.
Up to nine different stroke ranges can be set via a lever without requiring to remove the control unit. The new control unit is also available for the stroke range 1 – 500 and 10 – 5,000.
The new MWG actuator