Hydraulic Actuators utilize hydraulic fluid pressure to generate the force required to operate valves.
They Comprise a piston and cylinder mechanism where hydraulic fluid pressure moves the piston to actuate the valve.
They are widely used in subsea systems due to their reliability and high force output.
Hydraulic actuators are typically made from stainless steel and aluminum.
They have a high power-to-weight ratio, reliable in deepwater conditions, and can generate significant force. On the other hand, they require a hydraulic power unit and extensive hydraulic infrastructure.