Hydraulic driving device is a device that uses liquid pressure (usually hydraulic oil) to open and close or regulate valves. It is generally a hydraulic source device composed of hydraulic pump, driving motor, control box, oil cylinder, accumulator, throttle valve, overflow valve, etc. or a hydraulic device including control valve. It can be divided into two types: one is mounted on the actuator and the other is separated to form a hydraulic station.

l  Fast response, fast closing and opening

l  Single acting and double acting

l  Integrated and split