... 380V / 400V/110V , 50/60HzDrive System: two and three phase motor,Anti-explosion motorFrequency conversion motorProtection Degree: IP55Flow Control ... . Mechanical actuate diaphragm. Changeable eccentric drive2.Power off seal,no leakage,with security delivery ... body.PurposeWidely used in petroleum, chemical industry, electric power, metallurgy, mining, shipbuilding,light industry, agriculture, ...