Learn about hydraulic cylinder and actuator symbols
The top symbol shows a double acting single rod cylinder.
The middle symbol is the same except it the cylinder has adjustable cushions on both sides.
The bottom symbol shows a basic single acting cylinder.
Rotary actuators come in a number of formats from cylinder drives to hydraulic motors.
The top symbol shows a rotary actuator or swivel drive with limited swivel angle and two directions of flow.
The middle symbol shows a single acting, semi-rotary actuator or swivel drive. This means it only receives flow through one port connection and a spring to return it to its static condition.
The bottom symbol shows a standard hydraulic motor which is also a form of rotary actuator.