... PVCTechnical Parameter ModelFlow (lph)Pressure (Bar)Frequency (min-1)Power (kw)Caliber (DN)Weight (kg)GB-S 1200/ ... of operation. Mechanical actuate diaphragm. Changeable eccentric drive2.Power off seal,no leakage,with security delivery device, ... of the body.PurposeWidely used in petroleum, chemical industry, electric power, metallurgy, mining, shipbuilding,light industry, agriculture, national defense ...