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HYSND series intelligent non-invasive electric actuator combines mechanical transmission system with advanced operation control system.HYSND can be debugged without having to open the cover.HYSND is a series field with three items:SND-ZTZ,SND-ZTD and SND-QTJ.They are normally used for globe valve,brake valve,throttling valve,water gate,ball valve,butterfly valve,damper and other valves.