A hydraulic actuated valve means a valve has a hydraulic actuator, which consists of a cylinder or fluid motor that uses hydraulic power to facilitate mechanical operation. The hydraulic actuator has a similar working principle with the pneumatic actuator, the pneumatic actuators are normally used to control processes requiring quick and accurate response, as they do not require a large amount of motive force. But when a large amount of force is required to operate a valve (for example, the main steam system valves), hydraulic actuators are normally used.Although hydraulic actuators come in many designs, piston types are most common one.The mechanical motion gives an output in terms of linear, rotary or oscillatory motion. Because liquids are nearly impossible to compress, a hydraulic actuator can exert considerable force.

Hydraulic actuators are designed and suited for high force applications. They can produce forces 25 times greater than pneumatic cylinders of equal size.

Hydraulic Actuated Valve

Hydraulic Actuator For Valve