Applicable to variable fill-level systems, the unit features failsafe functionality that, in the event of power or pressure failure, allows operations personnel to advance the drive unit manually to a freely selectable safety position. The actuator offers simple maintenance and higher forces than an electrical actuator. Shipped fully assembled and tested, the drives are equipped with positioners and valves. The drive can be used for regulating knife gate valves e.g. in sewage plants, the bulk goods industry and all other applications in which the media in piping systems must be regulated. Units are available with diameters of 100, 125, 160, 200, 250 and 320 mm and strokes from 40 mm up to 990 mm; special designs with stroke above 990 mm are available on request. Protection class is IP65, IP67, IP69k, and explosion protection is per ATEX in accordance with EC directive 94/9/EC.
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